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rp506x series 2 a pwm / vfm s t e p -down dc/dc con verter with sy nchr onous re ctifi er no.ea-2 96-1 3092 5 1 outline the rp506x are low supply current cmos-based pwm/ vfm step-down dc/dc conver ters with synchronous rectifier featuring 2 a *1 output current. internally , a single conve r te r con s ist s of an o scill ator , a refe ren c e volt a g e unit, an e rro r amplifier , a switchi ng control ci rcuit, a m ode c ont rol ci rcuit, a sof t st art ci rcuit, a l atch type prot ection circuit, an un der-volt a g e lo ckout (uvlo ) circuit, a t hermal shu t do wn circuit, and swit chin g tran sisto r s. the rp5 06x is empl oying synchro nou s rectification f o r imp r oving the ef fici en cy of rectificatio n by repla c in g diode s with b uilt-in swit chi ng transi s to rs. using syn c h r ono us rectifi c ation not onl y increa se s circuit pe rform ance but also all ows a de sign to redu ce p a rt s cou nt. powe r control ling method can be sele cte d from forced pwm control type or pwm/vfm auto switchi ng cont rol type by inputting a si gnal to the mode pi n. in low outp u t current, forced p w m co ntrol switche s at fixed frequ ency rate in o r de r to redu ce n oi s e. likewi se, in low out p u t current, pwm/vfm auto swit chin g co n t rol automati c ally swit che s from pwm mode t o vfm mode in orde r to achieve high ef f i cien cy . output voltage type can be selected from an interna lly fixed output voltage type (rp506kxx1a/b/d/e) or an externally adjustable output voltage type (RP506K001C/ f). the output voltage of the rp506kxx1a/b/d/e can be set by 0.1 v step and the output voltag e accuracy is as high as 1.5% or 18 mv. the output voltage of the RP506K001C/f can be set by using the external resistors. oscillator frequency can be selected from 2.25 mhz (rp506kxx1a/b/c) or 1.2 mhz (rp506kxx1d/e/f). soft-start time is typ. 0.15 ms, and by connecting an external capacitor to the t ss pin, soft-start time is adjustable. power good (pg) function monitors the v out pin voltage or the feedback pin voltage (v fb ), and swit che s the pg pin to low if any abnormal con d ition is d e tected. protection circuits included in the rp506x are over cu rrent protection circuit, latch type protection circuit and thermal shutdown circuit. over current protection circuit supervises the inductor peak current in each switching cycle, and if the current exceeds the l x current limit (i lxlim ), it turns off pch tr. latch type protection circuit latches the built-in driver to the off state and stops the operati on of the step-down dc/dc conv erter if the over current status continues or v out continue s bein g the half of the setting volt age for equ a l or longer th an prote c tion delay time (tprot ). therm a l shut down ci rcuit detect s ove r h eating of the conve r ter if the output pi n is shorte d to the grou nd pin (gnd) etc. an d stop s the c onverte r operation to protect it from damage if the junctio n temperatu r e excee ds the spe c ified tem peratu r e. the rp506x is available in dfn(plp)2527-10 wh ich achieves high-density mounting on boards. *1 this is an approximate value. the output current is dependent on conditions and external components. http://
rp506x no.ea-2 96-1 3092 5 2 features z supply current typ. 48 a (vfm mode, lx at no load) z standby current max. 5 a z input voltage range 2.5 v to 5. 5 v (absolute maximum ratings: 6.5 v) z output voltage range *1 version forced pwm control pwm/vfm auto switching control rp506kxx1a/b 1.1 v to 3.3 v 0.8 v to 3.3 v RP506K001C 1.1 v to 4.0 v 0.8 v to 4.0 v rp506kxx1d/e 0.6 v to 3.3 v rp506k001f 0.6 v to 4.0 v z output voltage ac curacy 1.5% (v set *2 1.2 v), 18 mv (v set < 1.2 v) (rp506kxx1a/b/d/e) z feedback voltage accu racy 9 mv (v fb = 0.6 v) (RP506K001C/f) z output voltage/feedback voltage temperature coeffi cient 100 ppm/oc z oscillator frequency typ. 2.25 mhz (rp506kxx1a/b/c) typ. 1.2 mhz (r p506kxx1d/e/f) z oscillator maximum duty min. 100% z built-in driver on resi stance typ. pch. 0.130 ? , nch. 0.125 ? (v in = 3.6 v) z uvlo detector thre shold typ. 2.2 v z inductor current limit circuit current limit typ. 2.8 a z latch type protection circuit typ. 1.5 ms z package df n(plp)2527 ? 10 *1 refer to se lectio n guid e for det ail ed i n fo rmation. f i xed output volt a ge t y pe (rp506k xx 1 a/b/d/e) can be set by 0.1 v step. *2 v set = set output voltage z application z powe r so urce for li-ion b attery-u se d equi pment z power source for portable communication equipment, camcorder, dsc, notebook pc z powe r so ur ce for hd d, wl an
rp506x no.ea-2 96-1 3092 5 3 block diagram ce pv in ag nd l x chip enable ramp com p ensation current feedback current detecto r switching control uvlo osc vref v out mode control soft start pgnd mode thermal protection av in t ss ( ? l? d u r i ng s o f t s t a r t) pg o ver / u nder v ol t age det e c t i on ovd uvd rp506kxx1a/d ce pv in ag nd l x chip enable ramp com p ensation current feedback current detector switching control uvlo osc vref v out mode control soft start pgnd mode thermal protection av in t ss ( ? l? d u r i ng s o f t s t a r t) pg o ver / u nder v ol t age det e c t i on ovd uvd rp506kxx1b/e
rp506x no.ea-2 96-1 3092 5 4 ce pv in ag nd l x chip enable ramp com p ensation current feedback current detecto r switching control uvlo osc vref v fb mode control s o ft s ta r t pgnd mode thermal protection av in t ss ( ? l ? du r i ng sof t s t ar t) pg over / u nd er v ol t ag e det e c t i o n ov d uvd RP506K001C/f
rp506x no.ea-2 96-1 3092 5 5 selection guide the set o u tpu t voltage, the output volt ag e type, the auto-disch a rge functio n *1 , and the oscill ator frequen cy for the ics a r e use r -sel ect able optio ns. selection gu ide product name package quantity per reel pb free halogen free rp506kxx1$(y)-tr dfn(plp)2527 ? 10 5,000 pcs yes yes xx: designati on of the set output voltag e (v set ) for fixed output voltage type: 0.6 v (06) *2 to 3.3 v (33) in 0.1 v steps *3 for adjustable output voltage type: 001 only (y ): if v set includes the 3rd digit, indicate the digit of 0.01 v. ( 1 . 2 5 v ) ex. i f v set is 1.25 v, rp506k121$5-tr-fe. $: desi gnatio n of versio n v set version output voltage ty p e aut o-dis cha rge function oscillator freque nc y forced pwm pwm/vfm auto switching rp506kxx1a no rp506kxx1b fixed yes 1.1 v to 3.3 v 0.8 v to 3.3 v RP506K001C adjustabl e 2.25 mhz 1.1 v to 4.0 v 0.8 v to 4.0 v rp506kxx1d no rp506kxx1e fixed yes 0.6 v to 3.3 v rp506k001f adjustabl e no 1.2 mhz 0.6 v to 4.0 v *1 auto-d ischar ge functi on qui ckl y lo w e rs the output vo ltag e to 0 v, w h e n t he ch ip e n a b le sign al is s w i t c hed from th e active mode to the standby mode, by releasing the elec trical charge accumulated in the external capacitor. *2 v set can be set only within the specified range of voltage. refer to designation of version for detailed information. *3 0.0 5 v step i s also ava ila bl e as a custom code.
rp506x no.ea-2 96-1 3092 5 6 pin description bo tto m v i ew to p v i e w 61 0 78 9 51 432 10 6 9 8 7 1 5 2 3 4 ? dfn(plp)2527-10 pin configurations dfn(plp)2527-10 pin description pin no. symbol description 1 pv in pv in input voltage pin *1 2 av in av in input voltage pin *1 3 pg power good pin 4 ce chip ena ble pin (activ e ?h ?) 5 mode mode control pin (?h?: forced pwm control, ?l?: pwm/vfm auto switching control) 6 t ss soft-start pin 7 v out / v fb output/ feedback voltage pin 8 agnd analog ground pin *2 9 l x switching pin 10 pgnd power ground pin *2 ? the tab on the bottom of the package enhances thermal performance and is elec trically connected to gnd (substrate level). it is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating. *1 no.1 pin and no.2 pin must be wired to the v in plane when mounting on boards. *2 no.8 pin and no.10 pin must wired to the gnd plane when mounting on boards.
rp506x no.ea-2 96-1 3092 5 7 absolute maximum ratings a b s o l u t e m a x i m u m r a t i n g s (a gnd=pg nd=0v) symbol item rating unit v in a/pv in pin voltage ? 0.3 to 6.5 v v lx l x pin voltage ? 0.3 to a/pv in +0.3 v v ce ce pin voltage ? 0.3 to 6.5 v v out /v fb v out /v fb pin voltage ? 0.3 to 6.5 v v mode mode pin voltage ? 0.3 to 6.5 v v pg pg pin voltage ? 0.3 to 6.5 v v tss t ss pin voltage ? 0.3 to av in +0.3 v i lx l x pin output current 2.8 a standard land pattern 910 mw p d power dissipation *1 dfn(plp)2527-10 high wattage land pattern 1400 mw t t a operating temperature range ? 40 to +85 c t t stg storage temperature range ? 55 to +125 c *1 refer to package information for detailed information about power dissipation. absolute maximum ratings electronic and mechanical stress momentarily exc eeded absolute maximum ratings may cause the permanent damages and may degrade the lifetime and safety for both device and system using the device in the field. the functional operation at or over these abso lute maximum ratings is not assured. recommended operating conditions (electrical characteristics) all of electro n i c equi pme n t shou ld b e desi gne d that the mounted s e micon ductor d e vices o per ate w i th in the recommended operating conditions. the semiconductor devic es cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by mom entary electronic noise or surge. and the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.
rp506x no.ea-2 96-1 3092 5 8 electrical characteristics rp506 kx x1 electrical ch arac teris t ics (ta = 25 c) symbol item conditions min. typ. max. unit istandby standby current a/pv in = 5.5 v, v ce = 0 v 0 5 a i ceh ce ?h? input current a/pv in = v ce = 5.5 v ? 1 0 1 a i cel ce ?l? input current a/pv in = 5.5 v, v ce = 0 v ? 1 0 1 a i modeh mode ?h? input current a/pv in = v mode = 5.5 v, v ce = 0 v ? 1 0 1 a i model mode ?l? input current a/pv in = 5.5 v, v ce = v mode = 0 v ? 1 0 1 a i lxleakh l x leakage current ?h? a/pv in = v lx = 5.5 v, v ce = 0 v ? 1 0 6 a i lxleakl l x leakage current ?l? a/pv in = 5.5 v, v ce = v lx = 0 v ? 6 0 1 a v ceh ce ?h? input voltage a/pv in = 5.5 v 1.0 v v cel ce ?l? input voltage a/pv in = 2.5 v 0.4 v v modeh mode ?h? input voltage a/pv in = 5.5 v 1.0 v v model mode ?l? input voltage a/pv in = 2.5 v 0.4 v r onp on resistance of pch transistor a/pv in = 3.6 v, i lx = ? 100 ma 0.130 ? r onn on resistance of nch transistor a/pv in = 3.6 v, i lx = ? 100 ma 0.125 ? maxduty maximum duty cycle 100 % tstart1 soft-start time 1 a/pv in = v ce = 3.6 v or v set +1 v , t ss = open 150 300 s tstart2 soft-start time 2 a/pv in = v ce = 3.6 v or v set +1 v , c ss = 0.1 f 15 30 45 ms i lxlim l x current limit a/pv in = v ce = 3.6 v or v set +1 v 2300 2800 ma tprot protection delay time a/pv in = v ce = 3.6 v or v set +1 v 0.5 1.5 5 ms v uvlo1 uvlo detector threshold a/pv in = v ce 2.1 2.2 2.3 v v uvlo2 uvlo released voltage a/pv in = v ce 2.2 2.3 2.4 v t tsd thermal shutdown temperature junction temperature 150 c t tsr therm al shut down rel eased temperature junction temperature 100 c r pg on re si stan ce of pg pin when low output a/pv in = 3.6 v, v out = 0 v or v fb = 0 v 45 ? ? rp506kxx1a/b, RP506K001C (oscillator freque ncy: 2.25mhz) electrical characteristics 1.1 v v set < 1.2 v 2.5 4.5 when mode = h operating input voltage *1 1.2 v v set 2.5 5.5 0.8 v v set < 1.0 v 2.5 4.5 v in when mode = l operating input voltage *2 1.0 v v set 2.5 5.5 v f osc oscillator frequency a/pv in = v ce = 3.6 v or v set +1 v 2.00 2.25 2.50 mhz ? rp506kxx1d/e, rp506k001f (oscillator frequency: 1.2mhz) electrical characteristics 0.6 v v set < 0.7 v 2.5 4.5 when mode = h operating inp u t voltage 0.7 v v set 2.5 5.5 v in when mode = l operating input voltage 0.6 v v set 2.5 5.5 v f osc oscillator frequency a/pv in = v ce = 3.6 v or v set +1 v 1.00 1.20 1.40 mhz
rp506x no.ea-2 96-1 3092 5 9 symbol item conditions min. typ. max. unit rp506kxx1a/b/d/e (fixed output volt age type) electrical characteristics v set 1.2 v x ? 1.015 x 1.015 v out output voltage a/pv in = v ce = 3.6 v or v set +1 v v set < 1.2 v ? 0.018 +0.018 v v out / ta output voltage temperature coefficient ? 40c t a 85c 100 ppm /c i dd1 supply current 1 a/pv in = v ce = 5.5 v, v out = v set 0.8 600 a v mode = 0 v 48 72 a i dd2 supply current 2 a/pv in = v ce = v out = 5.5 v v mode = 5.5 v 600 a i voutl v out ?l? current a/pv in = 5.5 v, v ce = v out = 0 v ? 1 0 1 a v ovd ovd voltage a/pv in = 3.6 v v set 1.2 v v uvd uvd voltage a/pv in = 3.6 v v set 0.8 v rp506kxx1a/d (fixed output voltage type without auto-discharge function) i vouth v out ?h? current a/pv in = v out = 5.5 v, v ce = 0 v ? 1 0 1 a rp506kxx1b/e (fixed output voltage type with auto-discharge function) r low on resistance of low output a/pv in = 3.6 v, v ce = 0 v 45 ? RP506K001C/f (adjustable output voltage type) electrical characteristics v fb feedback voltage a/pv in = v ce = 3.6 v 0.591 0.600 0.609 v v fb / ta feedback voltage temperature coefficient ? 40c t a 85c 100 ppm /c i dd1 supply current 1 a/pv in = v ce = 5.5 v, v fb = 0.48 v 600 a v mode = 0 v 48 72 a i dd2 supply current 2 a/pv in = v ce = v fb = 5.5 v v mode = 5.5 v 600 a i vfbh v fb ?h? current a/pv in = v fb = 5.5 v, v ce = 0 v ? 1 0 1 a i vfbl v fb ?l? current a/pv in = 5.5 v, v ce = v fb = 0 v ? 1 0 1 a v ovd ovd voltage a/pv in = 3.6 v 0.72 v v uvd uvd voltage a/pv in = 3.6 v 0.48 v all test items listed under electrical characteristics are done under the pulse load condition (tj ta = 25c) except output voltage temperature coefficient and fe edback voltage temperature coefficient. *1 as for rp506kxx1a/b/c (mode = h), v set can be set from 1 . 1 v. *2 as for rp506kxx1a/b/c (mode = l), v set can be set from 0.8 v.
rp506x no.ea-2 96-1 3092 5 10 typical application pg function is used, 30 ms soft-start time *1 mode = ?h?: forced pwm control, mode = ?l?: pwm/vfm auto switching control pv in pg pg nd l x v out agnd v in c out 30 uf v ou t l1 2.2 uh r p 506 x series ce t ss mode *1 r pg 1 00 k c in 10 uf pg a v in c ss 0.1 uf rp506kxx1 a/b/d/e (fix ed outp ut v olt age t y pe) pg function is not used, 150 s soft-start time *1 mode = ?h?: forced pwm control, mode = ?l?: pwm/vfm auto switching control pv in pg pg n d l x v fb agnd v in c out 30 uf v ou t l2 2.2 uh r p 506 x series a v in ce t ss mode *1 c in 10 uf r1 r2 c1 rp506k001 c/f (adjust a ble outpu t v olt age t y pe)
rp506x no.ea-2 96-1 3092 5 1 1 recommended external components symbol size part description model c1608jb0j106m (tdk) c in 10 f ceramic capacitor jmk107bj106ma (taiyo yuden) 22 f x 2 ceramic capacitor c2012jb0j226m (tdk) c1608jb0j106m (tdk) c out 10 f x 3 ceramic capacitor jmk107bj106ma (taiyo yuden) slf6045t-2r2n3r3 (tdk) clf7045-2r2n (tdk) fdsd0415-2r2m (toko) l (v set 3.3v) 2.2 h inductor rlf7030t-2r2m5r4 (tdk) slf6045t-4r7n2r4 (tdk) clf7045-4r7n (tdk) fdsd0415-4r7m (toko) l (v set > 3.3v *1 ) 4.7 h inductor rlf7030t-4r7m3r4 (tdk) *1 only for rp506kxx1c/f small and low profile external components symbol size part description model dfe252010r-h-1r0m (toko) l (v set 1.5v) 1.0 h inductor vls252010hbx-1r0m (tdk) dfe252010r-h-1r5m (toko) l (v set 2.3v) 1.5 h inductor vls252010hbx-1r5m (tdk) dfe252010r-h-2r2m (toko) l 2.2 h inductor vls252010hbx-2r2m (tdk)
rp506x no.ea-2 96-1 3092 5 12 technical notes the performance of power source circuits using this ic largely depends on peripheral circuits. when selecting the peripheral components, please consider the conditions of use. do not allow each component, pcb pattern or the ic to exceed their respected rated values (v oltage, current, and power) when designing the peripheral circuits. z agnd and p g nd mu st be wired to the gnd plan e when mou n ting on boards. z av in and pv in must be wired to the v in plane when mo unting on b oa r ds. z ensure the a/pv in and a/pgnd lines are sufficiently robust. a large switching current flows through the a/ pgnd line, the v dd line, the v out line, an inductor, and l x . if their impedance is too high, noise pickup or unstable operation may result. set the external compo nents as close as possible to the ic and minimize the wiring between the components and the ic. especially, place a capacitor (c in ) as close as possible to the pv in pin and pgnd. for the rp506kxx1a/b/d/e, separate the wiring between the v out pin and an inductor (l1) from the wiring between l1 and load. likewise, for the RP506K001C/f, separate the wiring between a resistor for setting output voltage (r1) and an inductor (l2) from the wiring between l2 and load. z choose a low esr ceramic capacitor. the ceramic capacitance of c in should b e more than or equal to 1 0 f. for a ceramic capacitor (c out ), it is recommended that three paralleled 10 f ceramic capacitors or two paralleled 22 f ceramic capacitors be used. z when v set 3.3 v, a 2.2 h inductor is recommended for rp506kxx1a/b/c/d/e/f. when v set 2.3 v, a 1.5 h inductor can be used for rp506kxx1a/b/c. when v set 1.5 v, a 1 h inductor can be used for rp506kxx1a/b/c. when v set > 3.3 v, a 4.7 h inductor is recommended for rp506kxx1c/f. the phase compensation of this ic is designed according to the c out and l values. choose an inductor that has small dc resistance, has enough allowable current and is har d to cause magnetic saturation. if the inductance value of an inductor is extremely small, the peak current of l x may increase along with the load current. as a result, over current protection circuit ma y start to operate when the peak current of l x reaches to ?l x limit current?. set output voltage range vs. inductance range version rp506kxx1a/b rp506kxx1d/e set output voltage v set (v) l = 1.0 h l = 1.5 h l = 2.2 h l = 2.2 h up to 1.5 acceptable acceptable recommended recommended 1.6 to 2.3 - acceptable recommended recommended 2.4 to 3.3 - - recommended recommended version rp506kxx1c rp506kxx1f set output voltage v set (v) l = 1.0 h l = 1.5 h l = 2.2 h l = 4.7 h l = 2.2 h l = 4.7 h up to 1.5 acceptable acceptable recommended - recommended - 1.6 to 2.3 - acceptable recommended - recommended - 2.4 to 3.3 - - recommended - recommended - 3.4 or more - - - recommended - recommended
rp506x no.ea-2 96-1 3092 5 1 3 z over current protection circuit and latch type protec tion circuit may be affected by self-heating or power dissipation environment. z the output voltage (v set ) is adjustable by changing the resistance va lues of resistors (r1, r2) as follows. v set = v fb (r1 + r2) / r2 (recommended v out range for rp506k001f: 0.6 v v set 4.0 v) (recommended v out range for RP506K001C: 0.8 v v set 4.0 v) if r1 and r2 are too large, the impedances of v fb also become large, as a result, the ic could be easily affected by noise. for this reason, r2 should be 220 k ? or less. if the operation becomes unstable due to the high impedances, the impeda nces should be decreased. c1 can be calculated by the following equations. pl ease use the value close to the calculation result. c1 = 4.84 10 -6 / r 2 [f] the recommended resistance values for r1 and c1 when r 2 = 220 k ? or 100 k ? are as follows. set output voltage (v set ) v s . resistor s (r1, r2) a n d cap aci tor (c1) v set [v] 0.6 0.7 0.8 1.2 1.8 2.5 3.3 3.8 4.0 r1 [k ? ] 0 36.7 73.3 220 440 697 990 533 567 r2 [k ? ] 220 220 220 220 220 220 220 100 100 c1 [pf] - 22 22 22 22 22 22 15 15 z soft-start time (tstart) is adjustable by connecting a capacitor (c ss ) between the t ss pin and gnd. the capacitance value for c ss that is suitable for tstart can be calculated by the following equation. c ss (nf) = 3.5 ts ta r t ( m s ) the t ss pin must be open if soft-start time function is not used. soft-start time is set to typically 150 s when the t ss pin is open. z when using the power good function, the resistance value of a resistor (r pg ) should be between 10 k ? to 100 k ? . the pg pin must be open or connected to gnd if the power good function is not used.
rp506x no.ea-2 96-1 3092 5 14 soft start time adjustm ent function and po wer good function soft-start time ad justment function soft-start time (tstart) of the rp506x is adjustable by connecting a soft-start time adjustment capacitor (c ss ) between the t ss pin and gnd. tstart can be set from typ. 0.15 ms. as figure 6 shows, if 0.1 f c ss is connected, tstart will be 30 ms. the t ss pin must be open if the soft-start time func tion is not used. tstart is set to 0.15 ms (typ.) when the t ss pin is open. ts tar t 30ms 15ms 3ms 0.15 m s 0 470pf 0.01 f 0.047 f 0.1 f c ss c ss vs. tstart (typ.) sof t-st ar t t i m e (t st ar t) v s. sof t-st art t i m e adjust m ent cap aci tor ( c ss ) power good function the rp506x cont ain s a po wer go od fun c tion u s in g nch o pen drai n. if any abn ormal co nditi on is dete c te d, the power goo d functio n turns nch tran sist or on and switch es the pg pin to lo w . if the cause of the abnorm al con dition is re moved, the powe r good fu nction turn s nch tran sisto r of f and switch es the pg pin back to high. af ter the recovery from abno rmal con dition , it t akes typ i ca lly 0.1 ms for the ic to turns nch transi s to r of f. the followin g s a r e the abnormal conditio n s th at the powe r good fun c tion can dete c t. ? ce = ?l? (s hut down) ? uvl o (shu t down) ? the r mal s hut do wn ? over voltage detection: typ. v set x 1.2 v (rp506kxx1a/b/d/e) or 0.72 v (rp506kxx1c/f) ? under voltage detection: typ. v set x 0.8 v (rp506kxx1a/b/d/e) or 0.48 v (rp506kxx1c/f) when using the power good function, the resistance of pg pin (r pg ) should be between 10 k ? to 100 k ? . the pg pin must be open or connected to gnd if the power good function is not used.
rp506x no.ea-2 96-1 3092 5 1 5 sequencial start-up using soft-start time adjustment function and power good function sequential startup circuits can be built by using soft-sta rt time adjustment function and power good function of the rp506x. figure 7 is an example of sequential startup circuits using dc/dc1 and dc/dc 2. by sending a pg signal to the ce pin of dc/dc2, dc/dc1 starts up first followed by dc/dc2. dc/dc1 (RP506K001C/f): v in = 5.0 v, v out = 1.8 v, tstart = 30 ms (c ss = 0.1 f) dc/dc2 (RP506K001C/f): v in = 5.0 v, v out = 1.2 v, tstart = 30 ms (c ss = 0.1 f) pv in pg pg n d lx v fb agnd v in = 5.0 v c out1 30 f v ou t 1 1. 8 v l 1 2.2 h r p 506k 0 01c / f a v in ce t ss mode r pg 1 100 k ? c in 1 10 h 440 k ? 22 pf pv in pg pg n d lx v fb agnd c ou t 2 30 f v ou t 2 1. 2 v l 2 2.2 h r p 506k 0 01c / f a v in ce t ss mode c in 2 10 h 22 pf dc/ d c1 dc/ d c2 220 k ? 220 k ? 220 k ? c ss 1 0.1 f c ss 2 0.1 f circuit s example using sequen t ial s t artup
rp506x no.ea-2 96-1 3092 5 16 opera t i o n of step-down dc/dc co nverter and outptut current the step-down dc/dc converter charges energy in the inductor when l x tr. turns ?on?, and discharges the energy from the inductor when l x tr. turns ?off? and controls with less energy loss, so that a lower output voltage (v out ) than the input voltage (v in ) can be obt ained. th e o peratio n of the step -do w n dc/ dc conv erter i s explained in the following figures. pch t r l nch t r v in i1 v out cl i2 gnd t 1/fosc ton tof f topen ilm i n il m a x il i1 i2 basic circu i t inductor current (il) flowing through inductor (l) step1. pch tr. turns ?on? and il (i1) flows, l is charged with energy. at this moment, i1 increases from the minimum inductor current (ilmin), which is 0 a, and reaches the maximum inductor current (ilmax) in proportion to the on-time period (ton) of pch tr. step2. when pch tr. turns ?off?, l tries to maintain il at ilmax, so l turns nch tr. ?on? and il (i2) flows into l. s t ep3. i2 decrea s e s grad ually and reache s ilmin af ter t he op en-time pe rio d (topen ) of nch t r ., and then nch t r . turns ?off?. this is called discontinuous current mode. as the output current (i out ) increases, the off-time period (toff) of pch tr. runs out before il reaches ilmin. the next cycle starts, and pch tr. turns ?on? and nch tr. turns ?off?, which means il starts increasing from ilmin. this is called continuous current mode. in the case of pwm mode, v out is maintained by controlling ton. du ring pwm mode, the oscillator frequency (fosc) is being maintained constant. as shown in figure 9, when the step-down dc/dc operat ion is constant, ilmin and ilmax during ton of pch tr. would be same as during toff of pch tr. the current differential between ilmax and ilmin is described as i. i = ilmax ? ilmin = v out topen / l = (v in ? v out ) ton / l equation 1 however, t = 1 / fosc = ton + toff duty (%) = ton / t 100 = ton fosc 100 topen toff in equation 1, ?v out topen / l? shows the amount of curr ent change in "on" state. also, ?(v in ? v out ) ton / l? shows the amount of current change at "off" state.
rp506x no.ea-2 96-1 3092 5 1 7 discon t inuo us mode and continu ous mode as illustrated in figure 1, when i out is relatively small, topen < toff. in this case, the energy charged into l during ton will be completely discharged during toff, as a result, ilmin = 0. this is called discontinuous mode. when i out is gradually increased, event ually topen = toff and when i out is increased further, eventually ilmin > 0, as illustrated in figure 2. this is called continuous mode. ilm ax ilm i n ton toff t=1/fosc tope n il t ilm a x ilm i n ton toff t=1/fosc il iconst t figure 1. discontinuous mode figure 2. continuous mode in the continuous mode, the solution of equation 1 is described as tonc. tonc = ta v out / v in equat ion 2 when ton < tonc, it is discontinuous mode, and when ton = tonc, it is continuous mode.
rp506x no.ea-2 96-1 3092 5 18 forced pwm mode by setting the mode pin to ?h?, the ic switches the fr equency at the fixed rate to reduce noise even when the output load is light. therefore, when i out is ? il/2 or less, ilmin becomes less than 0. that is, the accumulated electricity in cl is discharged through the ic side while il is increasing from ilmin to 0 during ton, and also while il is decreasing from 0 to ilmin during toff. ilm ax ilm i n ton toff t=1/fosc il i out t 0 il forced pwm mode vfm mode by setting the mode pin to ?l?, in low output current, t he ic automatically switches into vfm mode in order to achieve high efficiency. in vfm mode, ton is forced to end when the inductor current reaches the pre-set ilmax. in the vfm mode, ilmax is typically set to 400 ma for the rp506kxx1a/b/c, and 550 ma for the rp506kxx1d/e/f. when ton reaches 1.5 times of t = 1 / fosc , ton will be forced to end even if the inductor current is not reached ilmax . il m a x il m i n ton toff il t 0 vfm mode
rp506x no.ea-2 96-1 3092 5 1 9 output current and selection of external components the following equations explain the relationship between output current and peripheral components that are listed in table1. recommended external components . ripple current p-p value is described as i rp , on resistance of pch tr. is described as r onp , on resistance of nch tr. is described as r onn , and dc resistor of the inductor is described as r l . first, when pch tr. is ?on?, the following equation is satisfied. v in = v out + (r onp + r l ) i out + l i rp / ton equation 3 second, when pch tr. is "off" (nch tr. is "on"), the following equation is satisfied. l i rp / toff = r onn i out + v out + r l i out equat ion 4 put equation 4 into equation 3 to solve on duty of pch tr. (d on = ton / (toff + ton)): d on = (v out + r onn i out + r l i out ) / (v in + r onn i out ? r onp i out )equation 5 ripple current is described as follows: i rp = (v in ? v out ? r onp i out ? r l i out ) d on / fosc / l equat ion 6 peak current that flows through l, and l x tr. is described as follows: il x max = i out + i rp / 2 e quation 7 please consider ilxmax when setting conditions of input and output, as well as selecting the external components. the above calculation formulas are based on the ideal operation of the ics in continuous mode.
rp506x no.ea-2 96-1 3092 5 20 timing chart (1) soft-start time starting-up with ce pin the ic starts to operate when the ce pin voltage (v ce ) exceeds the threshold voltage. the threshold voltage is preset between ce ?h? input voltage (v ceh ) and ce ?l? input voltage (v cel ). after the start-of the start-up of the ic , soft-start circuit starts to operate. then, after a certain period of time, the reference voltage (v ref ) in the ic gradually increases up to the specified value. v ceh so ft- sta r t ti me ic internal reference voltage v ce l threshold level lx voltage (v ce ) (v ref ) s o ft - s ta rt ci rc u i t operation starts. (v lx ) dependi ng on p ow er s uppl y , load current , e x t ernal co m ponen t s (v out ) output voltage ce p i n i npu t v ol t age i c operat es w i t h p w m m ode duri ng s of t - s t ar t t i m e . t i ming chart sof t -st a rt time st art s wh e n sof t -st a rt circuit is a c tivated, and end s whe n the referen c e volt age re ach es the spe c ified volt age. sof t st a r t time is n o t al wa ys equ al to t he turn-o n s peed of the step-do wn dc/dc conv e r ter . plea se n o te that the turn-on sp eed co uld be af fe ct ed by the po wer sup ply cap a city , the output cu rre nt, the induct a n c e value and the c out value. s t arting-up w i th po w e r supply after the power-on, when v in exceeds the uvlo released voltage (v uvlo2 ), the ic starts to operate. then, soft-start circuit starts to operate and after a certain period of time, v ref gradually incre ases up to the sp ecified value. soft-start time starts when soft-s tart circuit is activated, and ends when v ref reaches the specified voltage. out put v ol t age (v ou t ) i nput v o l t age (v in ) v uv lo 2 i c i n t ernal ref erenc e v ol t age (v re f ) v uv lo 1 lx v ol t age (v lx ) v set v set dependi ng on p ow er s uppl y , loa d current , e x t ernal com ponent s s o ft - s ta rt t i m e ic operates with pwm mode during soft-start time. timing chart please n ote that the turn-o n spee d of v out could be affected by the power s upply capacity, the output current, the inductance value, the c out value and the turn-on speed of v in determined by c in .
rp506x no.ea-2 96-1 3092 5 2 1 (2) under voltage lockout (uvlo) circuit if v in becomes lower than v set , the step-down dc/dc converter stop s the switching operation and on duty becomes 100%, and then v out gradually drops according to v in . if the v in drops more and becomes lower than the uvlo detector threshold (v uvlo1 ), the uvlo circuit starts to operate, v ref stops, and pch and nch built-in switch transistors turn ?off?. as a result, v out drops according to the c out capacitance value and the load. to restart the operation, v in needs to be higher than v uvlo2 . the timing chart below shows the voltage shifts of v ref , v lx and v out when v in value is varied. output voltage (v out ) i nput v o l t age (v in ) v uv lo 2 i c i n t ernal ref erenc e v ol t age (v re f ) v uv lo 1 lx v ol t age (v lx ) v set v set dependi ng on p ow er s uppl y , loa d current , e x t ernal com ponent s soft-start time timing chart falling edge (operating) and rising edge (releasing) waveforms of v out could be affected by the initial voltage of c out and the output current of v out .
rp506x no.ea-2 96-1 3092 5 22 (3) over current protection circuit, latch type protection circuit over current protection circuit supervises the inductor peak current (the peak current flowing through pch tr.) in each switching cycle, and if the current exceeds the l x current limit (i lxlim ), it turns off pch tr. i lxlim of the rp506x is set to typ.2800 ma. latch type protection circuit latches the built-in driv er to the off state and stops the operation of the step-down dc/dc converter if the ov er current status continues or v out continues being the half of the setting voltage for equal or longer than protection delay time (tprot). notes: i lxlim and tprot could be easily affected by self-heating or ambient environment. if the v in drops dramatically or becomes unstable due to short-circ uit, protection operation and tprot could be affected. p r ot ect i on delay t i m e ( t prot ) lx limit current (i lxlim ) il flow in g t h r o u g h l cur r en t f l ow i ng t hrough p c h t r . l x v ol t age (v lx ) protection delay time t o rele ase th e latch type p r otectio n circuit, rest art th e ic by in putting "l" signal to the ce pi n, or re st art t he ic with power-on or make the supply voltage lower than v uvlo1 . the timing chart below shows the voltage shift of v ce , v lx and v out when the ic status is changed by the following orders: v in rising stable operation high load ce reset stable operation v in falling v in recovering (uvlo reset) stable operation. (1)(2) if the large current flows through the circuit or the ic goes into low v out condition due to short-circuit or other reasons, the latch type protection circuit latches the built-in driver to ?off? state after tprot. then, v lx becomes "l" and v out turns ?of f ?. (3) the latch type protection circuit is released by ce re set, which puts the ic into "l" once with the ce pin and back into "h". (4) the latch type protection circuit is released by uvlo reset, which makes v in lower than v uvlo1 . i n p u t v o lt ag e (v in ) v se t uvlo de t ect or thre s hol d (v uv l o 1 ) ce pi n in pu t v o lt ag e (v ce ) v se t thres hol d level l x v o lt a ge (v lx ) v se t o u tp ut v olt age (v out ) uvlo rel ea s e d v olt age (v uv l o 2 ) (1) ( 2) soft- s tart t i m e v set soft- s t a rt t i m e s o ft - s ta r t t i m e s t abl e operat i on stabl e operat i o n s t abl e operat i on prot ect i on del ay t i me p r o t ect i on del ay t i me uv lo res e t ce res et lat c h-type protection latch-type protection (3 ) ( 4) timing chart
rp506x no.ea-2 96-1 3092 5 2 3 package information power dissipation (dfn(plp)2527-10) power dissipation (p d ) of the package is dependent on pcb materi al, layout, and environmental conditions. the following conditions are used in this measurement. measurement conditions high wattage land pattern standard land pattern environment mounting on board (wind velocity = 0 m/s) mounting on board (wind velocity = 0 m/s) board material glass cloth epoxy plastic (4-lay ers) glass cloth epoxy plastic (double-sided) board dimensions 35 mm x 90 mm x 0.8 mm 40 mm x 40 mm x 1.6 mm copper ratio each layers: approx. 15% top side: approx. 50%, back side: approx. 50% through-holes 0.30 mm x 9 pcs 0.50 mm x 10 pcs 0.54 mm x 30 pcs measurement result (t a = 25c, t j max = 12 5c) high wattage land pattern standard land pattern power dissipation 1400 mw (tjmax = 125c) 910 mw (tjmax = 125c) thermal resistance ja = (125 ? 25c) / 1.4w = 71c/w ja = (125 ? 25c) / 0.91 w = 110c/w power dissipation p d (mw) 20 00 15 00 10 00 50 0 0 0 25 50 75 100 1 25 15 0 amb i en t t e mpe r atur e ( c) 85 1400 high wattage land pattern standard land pattern 910 power dissipation vs. ambient temperature measurement board pattern
rp506x no.ea-2 96-1 3092 5 24 package dimensions (dfn(plp)2527-10) 2.50 2.70 a b 0.05 x4 index 0.6max. 0.05min. s 0.05 s 6 1 0 51 0.25 0.1 0.25 0.1 0.10nom . 0.3 0 0.1 1.5 0.1 0.50 0.20 0.1 0.0 5 m ab 2.3 0.1 ? 0 .5 0.05 (unit : mm) bo ttom v i ew ? the tab on the bottom of the package enhances thermal performance and is electrically connected to gnd (substrate level). it is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating. dfn (plp) 2527-10 package dimensions mark specification (dfn(plp)2527-10) cdef : product code ? refer to mark specification table (dfn(plp)2527-10) gh : lot number ? alp h anume r i c serial numb er cde fgh 1 2 3 4 5 10 9 8 7 6 dfn (plp) 2527-10 mark specification
rp506x no.ea-2 96-1 3092 5 2 5 mark specification table (dfn (plp) 2527-10) product name c d e f product name c d e f rp506k081a d 0 8 a rp506k061d d 0 6 d rp506k091a d 0 9 a rp506k071d d 0 7 d rp506k101a d 1 0 a rp506k081d d 0 8 d rp506k111a d 1 1 a rp506k091d d 0 9 d rp506k121a d 1 2 a rp506k101d d 1 0 d rp506k131a d 1 3 a rp506k111d d 1 1 d rp506k141a d 1 4 a rp506k121d d 1 2 d rp506k151a d 1 5 a rp506k131d d 1 3 d rp506k161a d 1 6 a rp506k141d d 1 4 d rp506k171a d 1 7 a rp506k151d d 1 5 d rp506k181a d 1 8 a rp506k161d d 1 6 d rp506k191a d 1 9 a rp506k171d d 1 7 d rp506k201a d 2 0 a rp506k181d d 1 8 d rp506k211a d 2 1 a rp506k191d d 1 9 d rp506k221a d 2 2 a rp506k201d d 2 0 d rp506k231a d 2 3 a rp506k211d d 2 1 d rp506k241a d 2 4 a rp506k221d d 2 2 d rp506k251a d 2 5 a rp506k231d d 2 3 d rp506k261a d 2 6 a rp506k241d d 2 4 d rp506k271a d 2 7 a rp506k251d d 2 5 d rp506k281a d 2 8 a rp506k261d d 2 6 d rp506k291a d 2 9 a rp506k271d d 2 7 d rp506k301a d 3 0 a rp506k281d d 2 8 d rp506k311a d 3 1 a rp506k291d d 2 9 d rp506k321a d 3 2 a rp506k301d d 3 0 d rp506k331a d 3 3 a rp506k311d d 3 1 d rp506k121a5 d 0 0 a rp506k321d d 3 2 d rp506k081b d 0 8 b rp506k331d d 3 3 d rp506k091b d 0 9 b rp506k121d5 d 0 0 d rp506k101b d 1 0 b rp506k061e d 0 6 e rp506k111b d 1 1 b rp506k071e d 0 7 e rp506k121b d 1 2 b rp506k081e d 0 8 e rp506k131b d 1 3 b rp506k091e d 0 9 e rp506k141b d 1 4 b rp506k101e d 1 0 e rp506k151b d 1 5 b rp506k111e d 1 1 e rp506k161b d 1 6 b rp506k121e d 1 2 e rp506k171b d 1 7 b rp506k131e d 1 3 e rp506k181b d 1 8 b rp506k141e d 1 4 e rp506k191b d 1 9 b rp506k151e d 1 5 e rp506k201b d 2 0 b rp506k161e d 1 6 e rp506k211b d 2 1 b rp506k171e d 1 7 e rp506k221b d 2 2 b rp506k181e d 1 8 e rp506k231b d 2 3 b rp506k191e d 1 9 e rp506k241b d 2 4 b rp506k201e d 2 0 e rp506k251b d 2 5 b rp506k211e d 2 1 e rp506k261b d 2 6 b rp506k221e d 2 2 e rp506k271b d 2 7 b rp506k231e d 2 3 e rp506k281b d 2 8 b rp506k241e d 2 4 e rp506k291b d 2 9 b rp506k251e d 2 5 e rp506k301b d 3 0 b rp506k261e d 2 6 e rp506k311b d 3 1 b rp506k271e d 2 7 e rp506k321b d 3 2 b rp506k281e d 2 8 e rp506k331b d 3 3 b rp506k291e d 2 9 e rp506k121b5 d 0 0 b rp506k301e d 3 0 e RP506K001C d 0 0 c rp506k311e d 3 1 e rp506k321e d 3 2 e rp506k331e d 3 3 e rp506k121e5 d 0 0 e rp506k001f d 0 0 f
rp506x no.ea-2 96-1 3092 5 26 typical performanc e characteristics 1) output voltage vs. output current rp506 kx x1 a/b/c v out = 1.2 v rp506kxx1a/b/c v out = 1.2 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 1.180 1. 185 1. 190 1. 195 1. 200 1. 205 1. 210 1. 215 1. 220 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t put v o lt a g e v ou t (v) vin=3.6v vin=5.0v 1.180 1. 185 1. 190 1. 195 1. 200 1. 205 1. 210 1. 215 1. 220 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t put v o lt a g e v ou t (v) vin=3.6v vin=5.0v rp506 kx x1 a/b/c v out = 1.8 v rp506kxx1a/b/c v out = 1.8 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 1.780 1. 785 1. 790 1. 795 1. 800 1. 805 1. 810 1. 815 1. 820 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t p ut v o lt a ge v ou t (v) vin=3.6v vin=5.0v 1.780 1. 785 1. 790 1. 795 1. 800 1. 805 1. 810 1. 815 1. 820 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t p ut v o lt a ge v ou t (v) vin=3.6v vin=5.0v rp506 kx x1 a/b/c v out = 3.3 v rp506kxx1a/b/c v out = 3.3 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 3.260 3. 270 3. 280 3. 290 3. 300 3. 310 3. 320 3. 330 3. 340 3. 350 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t put v o lt a ge v ou t (v) vin=4.3v vin=5.0v 3.260 3. 270 3. 280 3. 290 3. 300 3. 310 3. 320 3. 330 3. 340 3. 350 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t put v o lt a ge v ou t (v) vi n =4 .3 v vi n =5 .0 v
rp506x no.ea-2 96-1 3092 5 2 7 rp506kxx1d/e/f v out = 0.6 v rp506kxx1d/e/f v out = 0.6 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 0.580 0. 585 0. 590 0. 595 0. 600 0. 605 0. 610 0. 615 0. 620 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o ut put v o l t ag e v ou t (v ) vin=3.6v vin=4.5v 0.580 0. 585 0. 590 0. 595 0. 600 0. 605 0. 610 0. 615 0. 620 0 2 00 400 6 00 800 1000 1200 1400 16 00 180 0 2 000 o ut put cur r ent i ou t (m a ) o u tp u t v o l ta g e v ou t (v ) vi n =3 .6 v vi n =4 .5 v rp506 kx x1 d/e/f v out = 0.8 v rp506kxx1d/e/f v out = 0.8 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 0.780 0. 785 0. 790 0. 795 0. 800 0. 805 0. 810 0. 815 0. 820 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t put v o lt a g e v ou t (v) vin=3.6v vin=5.0v 0.780 0. 785 0. 790 0. 795 0. 800 0. 805 0. 810 0. 815 0. 820 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t put v o lt a g e v ou t (v) vin=3.6v vin=5.0v rp506 kx x1 d/e/f v out = 1.2 v rp506kxx1d/e/f v out = 1.2 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 1.180 1. 185 1. 190 1. 195 1. 200 1. 205 1. 210 1. 215 1. 220 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t put v o lt a ge v ou t (v) vin=3.6v vin=5.0v 1.180 1. 185 1. 190 1. 195 1. 200 1. 205 1. 210 1. 215 1. 220 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t put v o lt a ge v ou t (v) vin=3.6v vin=5.0v
rp506x no.ea-2 96-1 3092 5 28 rp506 kx x1 d/e/f v out = 1.8 v rp506kxx1d/e/f v out = 1.8 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 1.780 1. 785 1. 790 1. 795 1. 800 1. 805 1. 810 1. 815 1. 820 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t p ut v o lt a ge v ou t (v) vin=3.6v vin=5.0v 1.780 1. 785 1. 790 1. 795 1. 800 1. 805 1. 810 1. 815 1. 820 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t p ut v o lt a ge v ou t (v) vin=3.6v vin=5.0v rp506 kx x1 d/e/f v out = 3.3 v rp506kxx1d/e/f v out = 3.3 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol 3.260 3. 270 3. 280 3. 290 3. 300 3. 310 3. 320 3. 330 3. 340 3. 350 0. 01 0 . 1 1 10 10 0 100 0 1 0000 o ut put cur r ent i ou t (m a ) o u t put v o lt a g e v ou t (v) vin=4.3v vin=5.0v 3.260 3. 270 3. 280 3. 290 3. 300 3. 310 3. 320 3. 330 3. 340 3. 350 0 200 4 00 60 0 80 0 1000 12 00 14 00 160 0 1 800 2 000 o ut put cur r ent i ou t (m a ) o u t put v o lt a g e v ou t (v) vi n =4 .3 v vi n =5 .0 v 2) outpu t volta ge v s . input voltage rp506 kx x1 d/e/f v out = 0.6 v rp506kxx1d/e/f v out = 0.8 v mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 0.780 0. 785 0. 790 0. 795 0. 800 0. 805 0. 810 0. 815 0. 820 2 . 53 3 . 54 4 . 55 5 . 5 i nput v ol t age v in (v ) o ut put v ol t ag e v ou t (v ) iout=1ma iout=1000ma iout=2000ma 0.580 0. 585 0. 590 0. 595 0. 600 0. 605 0. 610 0. 615 0. 620 2 . 533 . 5 4 4 . 555 . 5 i nput v ol t age v in (v ) o ut put v ol t ag e v ou t (v ) iout=1ma iout=1000ma iout=2000ma
rp506x no.ea-2 96-1 3092 5 2 9 rp506k v out = 1.2 v rp506k v out = 1.8 v mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 1.180 1. 185 1. 190 1. 195 1. 200 1. 205 1. 210 1. 215 1. 220 2. 5 3 3. 5 4 4. 5 5 5. 5 i nput v o lt age v in (v ) o u tp u t v o l ta g e v ou t (v ) iout=1m a iout=1000ma iout=2000ma 1.780 1. 785 1. 790 1. 795 1. 800 1. 805 1. 810 1. 815 1. 820 2 . 53 3 . 544 . 5 5 5 . 5 i n put v o lt age v in (v ) o ut put v o l t ag e v ou t (v ) iout=1m a iout=1000ma iout=2000ma rp506k v out = 3.3 v mode = ?h? forced p w m contr ol 3.260 3. 270 3. 280 3. 290 3. 300 3. 310 3. 320 3. 330 3. 340 3. 350 3. 8 4. 3 4. 8 5. 3 i npu t v ol t age v in (v ) o u t pu t v o l t ag e v ou t (v ) iout=1m a iout=1000ma iout=2000ma 3) ou tput vo ltage v s . ambient tempe ratur e 4) feedb ack voltag e v s . ambient tempera t ure rp506k181a/b/d/e v out = 1.8 v RP506K001C/f 1.770 1. 780 1. 790 1. 800 1. 810 1. 820 1. 830 - 50 - 25 0 25 50 7 5 100 t em per at ur e t a ( ) o ut p ut v o l t ag e v ou t (v) vin=3.6v 0.591 0. 593 0. 595 0. 597 0. 599 0. 601 0. 603 0. 605 0. 607 0. 609 - 50 - 25 0 25 50 75 100 t em p er at ur e t a ( ) f eed bac k v olt age v fb (v ) vin=3.6v
rp506x no.ea-2 96-1 3092 5 30 5) efficiency vs. output current rp506 kx x1 a/b/c v out = 1.2 v rp506 kx x1 a/b/c v out = 1.8 v 0 10 20 30 40 50 60 70 80 90 10 0 0 . 01 0 . 1 1 10 100 10 00 100 00 o u t p u t cu r r ent i ou t (m a ) e f f i c i enc y ( % ) v in =5.0v, v mode =0v v in =3.6v, v mode =0v v in =v mode =5.0v v in =v mode =3.6v 0 10 20 30 40 50 60 70 80 90 100 0. 01 0. 1 1 1 0 10 0 1000 10000 o ut put cur r ent i ou t (m a ) ef f i ci e n cy (% ) v in =5.0v, v mode =0v v in =3 .6 v , v mode =0v v in =v mode =5.0v v in =v mode =3.6v rp506 kx x1 a/b/c v out = 3.3 v 0 10 20 30 40 50 60 70 80 90 10 0 0. 01 0. 1 1 10 1 00 1 000 100 00 o ut put c u r r ent i ou t (m a ) e f f i ci e n cy (% ) v in =5.0v, v mode =0v v in =4.3v, v mode =0v v in =v mode =5.0v v in =v mode =4.3v rp506 kx x1 d/e/f v out = 0.6 v rp506 kx x1 d/e/f v out = 0.8 v 0 10 20 30 40 50 60 70 80 90 100 0. 01 0. 1 1 10 100 1000 10000 o ut put c ur r e nt i ou t (m a ) e f f i ci e n cy (% ) v in =5.0v, v mode =0v v in =3.6v, v mode =0v v in =v mode =3.6v v in =v mode =5.0v 0 10 20 30 40 50 60 70 80 90 100 0. 01 0. 1 1 10 100 1000 100 00 o u t p u t cu r r ent i ou t (m a ) e f f i ci e n cy (% ) v in =4.5v, v mode =0v v in =3.6v, v mode =0v v in =v mode =4.5v v in =v mode =3.6v
rp506x no.ea-2 96-1 3092 5 3 1 rp506 kx x1 d/e/f v out = 1.2 v rp506 kx x1 d/e/f v out = 1.8 v 0 10 20 30 40 50 60 70 80 90 10 0 0 . 01 0 . 1 1 10 100 10 00 100 00 o u t p u t cu r r ent i ou t (m a ) e ffi c i e n c y ( % ) v in =5.0v, v mode =0v v in =3.6v, v mode =0v v in =v mode =5.0v v in =v mode =3.6v 0 10 20 30 40 50 60 70 80 90 100 0. 01 0. 1 1 1 0 10 0 1000 10000 o ut put cur r ent i ou t (m a ) ef f i ci e n cy (% ) v in =5.0v, v mode =0v v in =3 . 6 v , v mode =0v v in =v mode =5.0v v in =v mode =3.6v rp506kxx1d/e/f v out = 3.3 v 0 10 20 30 40 50 60 70 80 90 10 0 0. 01 0. 1 1 10 1 00 1 000 100 00 o ut put c u r r ent i ou t (m a ) e f f i ci e n cy (% ) v in =5.0v, v mode =0v v in =4.3v, v mode =0v v in =v mode =5.0v v in =v mode =4.3v 6) supply cu rrent v s. ambient tempe ratur e 7) supply current v s . input voltage rp506 k v ou t = 1.8 v(v in = 5.5 v) rp506k v out = 1.8 v mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 35 40 45 50 55 60 65 - 50 0 50 100 t em pe r at ur e t a ( c ) s upply cur r ent ( ua ) closed loop open loop 35 40 45 50 55 60 65 2 . 533 . 54 4 . 555 . 5 i n put v o l t age v in (v ) s upply cur r ent ( ua ) closed loop open loop
rp506x no.ea-2 96-1 3092 5 32 8) output voltage waveform rp506 kx x1 a/b/c v out = 0.8 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 - 50 - 40 - 3 0 - 20 - 10 0 10 20 3 0 4 0 50 t i m e t ( s) o u t p u t ri ppl e v o l t ag e( a c ) v r i p pl e ( v ) -1 0 0 0 10 0 20 0 30 0 40 0 50 0 i n d u c to r c u r r e n t i l ( m a ) output voltage il i ou t = 10m a rp506kxx1a/b/c v out = 1.2 v(v in = 3.6 v) rp506kxx1a/b/c v out = 1.2 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 - 5 - 4 - 3 - 2 - 1 012345 ti m e t ( s) o ut put rippl e v ol t age( a c ) v r ipple ( v ) - 100 0 100 200 300 400 i nduc t or cu r r ent i l ( m a ) output voltage il i ou t =1 0 m a -0.03 -0 . 0 2 -0 . 0 1 0. 0 0 0. 0 1 0. 0 2 - 5 0 - 40 - 30 - 20 - 10 0 10 20 30 40 50 ti m e t ( s) o ut put ripple v olt age( a c ) v r i pple ( v ) - 100 0 100 200 300 400 500 i nduc t or cur r ent i l (m a ) output voltage il i ou t =1 0 m a rp506 kx x1 a/b/c v out = 1.8 v(v in = 3.6 v) rp506 kx x1 a/b/c v out = 1.8 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 - 5 - 4 - 3 - 2 - 1 012345 ti m e t ( s) o u t p ut ripple v o lt ag e( a c ) v r ipple ( v ) - 100 0 100 200 300 400 i nduc t or cur r ent i l ( m a ) o u t p u t v o lt age il i ou t =1 0 m a -0 . 0 3 -0 . 0 2 -0 . 0 1 0. 0 0 0. 0 1 0. 0 2 - 5 0 - 40 - 30 - 20 - 10 0 10 20 30 40 50 ti m e t ( s) o u t p ut ripple v o lt ag e( a c ) v r ipple ( v ) - 100 0 100 200 300 400 500 i nduc t or cur r ent i l ( m a ) o u t put v o lt age il i ou t =1 0 m a
rp506x no.ea-2 96-1 3092 5 3 3 rp506kxx1a/b/c v out = 3.3 v(v in = 5.0 v) rp506kxx1a/b/c v out = 1.8 v(v in = 5.0 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 - 5 - 4 - 3 - 2 - 1 012345 ti m e t ( s) o u t p ut ripple v o lt ag e( a c ) v r ipple ( v ) - 100 0 100 200 300 400 i nduc t or cur r ent i l ( m a ) output voltage il i ou t = 10m a -0.03 -0 . 0 2 -0 . 0 1 0. 0 0 0. 0 1 0. 0 2 - 5 0 - 40 - 30 - 20 - 10 0 10 20 30 40 50 ti m e t ( s) o u t p ut ripple v o lt ag e( a c ) v r ipple ( v ) - 100 0 100 200 300 400 500 i nduc t or cur r ent i l ( m a ) output voltage il i ou t =1 0 m a rp506kxx1d/e/f v out = 0.6 v(v in = 3.6 v) rp506kxx1d/e/f v out = 0.6 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 - 5 - 4 - 3 - 2 - 1 012345 ti m e t ( s) o ut put r i pple v olt age( a c ) v r ipple ( v ) - 100 0 100 200 300 400 i n d u c to r c u r r e n t il ( m a ) output voltage il i ou t =1 0 m a -0.06 -0 . 0 4 -0 . 0 2 0. 0 0 0. 0 2 - 250 - 150 - 50 50 15 0 2 50 ti m e t ( s) o ut put ripple v ol t age( a c ) vr i p p l e ( v) 0 200 400 600 800 i nduc t or cur r ent i l ( m a ) output voltage il i ou t =1 0 m a rp506kxx1d/e/f v out = 0.8 v(v in = 3.6 v) rp506kxx1d/e/f v out = 0.8 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 -5 - 4 -3 - 2 -1 0 1 2 3 4 5 ti m e t ( s) o u t put r i pple v o lt age ( a c ) v r ipple ( v ) -1 0 0 0 10 0 20 0 30 0 40 0 in d u c to r c u r r e n t il ( m a) output voltage il i ou t = 10m a -0.06 -0 . 0 4 -0 . 0 2 0. 0 0 0. 0 2 - 2 50 - 2 00 - 1 5 0 - 1 00 - 5 0 0 5 0 1 00 1 50 20 0 25 0 ti m e t ( s) o ut p ut rip ple v o l t a ge( a c ) v r ip ple ( v ) 0 20 0 40 0 60 0 80 0 in d u c t o r c u r r e n t il ( m a ) output voltage il i ou t = 10m a
rp506x no.ea-2 96-1 3092 5 34 rp506kxx1d/e/f v out = 1.2 v(v in = 3.6 v) rp506kxx1d/e/f v out = 1.2 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 -5 - 4 -3 - 2 -1 0 1 2 3 4 5 ti m e t ( s) o u t p ut rip p le v o lt a ge( a c ) vr i p p l e ( v) -1 0 0 0 10 0 20 0 30 0 40 0 in d u c to r c u r r e n t il ( m a ) output voltage il i ou t = 10m a -0.06 -0 . 0 4 -0 . 0 2 0. 0 0 0. 0 2 - 2 50 - 2 00 - 1 5 0 - 1 00 - 5 0 0 5 0 1 00 1 50 20 0 25 0 t i m e t ( s) o u t p u t ripple v o lt ag e( a c ) v r ip ple ( v ) 0 20 0 40 0 60 0 80 0 in d u c to r c u r r e n t il ( m a ) output voltage il i ou t = 10m a rp506kxx1d/e/f v out = 1.8 v(v in = 3.6 v) rp506kxx1d/e/f v out = 1.8 v(v in = 3.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 -5 - 4 -3 - 2 -1 0 1 2 3 4 5 ti m e t ( s) o u t p ut r i pp le v o lt a g e ( a c ) vri p p l e (v) -1 0 0 0 10 0 20 0 30 0 40 0 in d u c to r c u r r e n t il ( m a ) output voltage il i ou t = 10m a -0.06 -0 . 0 4 -0 . 0 2 0. 0 0 0. 0 2 - 2 50 - 2 00 - 1 5 0 - 1 00 - 5 0 0 5 0 1 00 1 50 20 0 25 0 t i m e t ( s) o u t p ut r i pp le v o lt a g e ( a c ) vri p p l e (v) 0 20 0 40 0 60 0 80 0 in d u c to r c u r r e n t il ( m a ) output voltage il i ou t = 10m a rp506kxx1d/e/f v out = 3.3 v(v in = 5.0 v) rp506kxx1d/e/f v out = 3.3 v(v in = 5.0 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?h? forced p w m contr ol -0.03 -0 . 0 2 -0 . 0 1 0. 00 0. 01 0. 02 -5 - 4 -3 - 2 -1 0 1 2 3 4 5 ti m e t ( s) o ut p ut rip ple v o lt a ge( a c ) v r ip ple ( v ) -1 0 0 0 10 0 20 0 30 0 40 0 in d u c t o r c u r r e n t il ( m a ) output voltage il i ou t = 10m a -0.03 -0 . 0 2 -0 . 0 1 0. 0 0 0. 0 1 0. 0 2 - 2 50 - 2 00 - 1 5 0 - 1 00 - 5 0 0 5 0 1 00 1 50 20 0 25 0 t i m e t ( s) o ut p ut rip ple v o lt a ge( a c ) v r ip ple ( v ) 0 20 0 40 0 60 0 80 0 in d u c t o r c u r r e n t il ( m a ) output voltage il i ou t = 10m a
rp506x no.ea-2 96-1 3092 5 3 5 9) oscillator frequency vs. ambient temperature rp506 kx x1 a/b/c rp506kxx1d/e/f 2.00 2. 05 2. 10 2. 15 2. 20 2. 25 2. 30 2. 35 2. 40 2. 45 2. 50 - 50 - 2 5 0 25 50 75 100 t em per at ur e t a ( c) f r eque nc y f o s c ( m hz ) vin=3.6 1.00 1. 05 1. 10 1. 15 1. 20 1. 25 1. 30 1. 35 1. 40 -5 0 -2 5 0 2 5 5 0 7 5 1 0 0 t em per at ur e t a ( c) f r equen c y f o s c ( m hz ) vin=3.6 10) oscillator frequency vs. input voltage rp506 kx x1 a/b/c rp506kxx1d/e/f 2.00 2. 05 2. 10 2. 15 2. 20 2. 25 2. 30 2. 35 2. 40 2. 45 2. 50 2. 5 3 3. 5 4 4. 5 5 5. 5 in p u t v o l ta g e v in (v ) f r equen c y f o s c ( m hz ) -40c 25c 85c 1.00 1. 05 1. 10 1. 15 1. 20 1. 25 1. 30 1. 35 1. 40 2. 5 3 3. 5 4 4. 5 5 5. 5 i npu t v o l t ag e v in (v ) f r equen c y f o s c ( m hz ) -40c 25c 85c 11) soft-start time vs. ambient temperature 150 16 0 17 0 18 0 19 0 20 0 21 0 22 0 23 0 24 0 25 0 - 50 - 25 0 25 5 0 75 100 t e m p er a t ur e t a ( ) s o ft s t a r t t i m e ts t a r t1 ( u s )
rp506x no.ea-2 96-1 3092 5 36 12) uvlo detector threshold/ released voltage vs. ambient temperature uvlo detector thresh old uvlo relea sed v olt ag e 2.15 2. 16 2. 17 2. 18 2. 19 2. 20 2. 21 2. 22 2. 23 2. 24 2. 25 - 5 0 - 25 0 2 5 5 0 7 5 1 00 t em per at ur e ( ) uv lo v olt age v uv l o 1 (v ) 2.25 2. 26 2. 27 2. 28 2. 29 2. 30 2. 31 2. 32 2. 33 2. 34 2. 35 - 50 - 25 0 25 5 0 75 1 00 t em per at ur e ( ) uv lo v olt age v uv l o 2 (v ) 13) ce input voltage vs. ambient temperature ce?h? inpu t v o lt age (v in = 5.5 v) ce?l ? inpu t v o lt age (v in = 2.5 v) 0.3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 1. 1 - 50 - 25 0 25 50 75 100 t e m per at u r e ( ) ce i nput v olt age v ce h (v ) 0.3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1. 0 1. 1 - 50 - 25 0 25 50 75 100 t em per at ur e ( ) ce i n put v olt age v ce l (v ) 14) lx limit current vs. ambient temperature 27 00 2800 29 00 30 00 31 00 32 00 33 00 - 5 0 - 2 5 0 2 55 07 5 1 0 0 t em p er at u r e ( ) l x li m i t c u r r en t i lxli m (m a )
rp506x no.ea-2 96-1 3092 5 3 7 15) nch tr. on re sista n ce v s . ambient temper ature 16) pch tr. on resi stan ce v s . a m bient tem perature 0 0. 02 0. 04 0. 06 0. 08 0. 10 0. 12 0. 14 0. 16 0. 18 0. 20 - 5 0 - 2 502 5 5 0 7 5 1 0 0 t em per at ur e ( ) nc h t r . o n r e s i s t anc e r on ( ? ) 0 0. 02 0. 04 0. 06 0. 08 0. 10 0. 12 0. 14 0. 16 0. 18 0. 20 - 50 - 25 0 25 50 7 5 100 t e m per at u r e ( ) p c h t r . o n res i s t anc e r on ( ? ) 17) pg detector threshold vs. ambient temperature ov er v o lt age dete ction (v ovd ) under v o lt ag e detec t ion (v uv d ) 1.10 1. 15 1. 20 1. 25 1. 30 - 50 - 25 0 2 5 50 7 5 100 t e m per at u r e ( ) p g o v er v olt age de t e c t ion v ov d vo l t a g e ( v se t y) 0.70 0. 75 0. 80 0. 85 0. 90 - 50 - 25 0 25 50 75 100 t em per a t ur e ( ) p g unde r v olt a ge det ec t ion v uv d v o lt age ( vset y) vs e t vs e t vs e t vs e t 18) soft-start waveform rp506k v out = 1.8 v t ss = open rp506k v out = 1.8 v t ss = 0.1 f 0 2 4 6 - 50 0 50 1 00 150 200 25 0 300 350 40 0 450 ti m e t ( u s ) c e in p u t v o l ta g e ( v ) -1 0 1 2 3 4 o ut put v ol t ag e ( v ) pg vo l t a g e ( v ) 0 2 4 6 - 5 0 5 1 0 15 20 2 5 30 35 40 45 t i m e t ( m s ) c e in p u t v o l ta g e ( v ) -1 0 1 2 3 4 o ut put v ol t ag e ( v ) pg vo l t a g e ( v ) ce input voltage ce input voltage pg voltage pg voltage output voltage output voltage
rp506x no.ea-2 96-1 3092 5 38 19) lo ad tra n sient resp onse rp506kxx1a/b/c (v in = 3.6 v, v out = 0.8 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 0.8 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 0.70 0. 7 5 0. 8 0 0. 8 5 0. 9 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t put v o lt a g e v ou t (v) 0 50 0 10 00 15 00 ou tp u t c u r r e n t i ou t (ma) 0.70 0. 75 0. 80 0. 85 0. 90 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t put v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output voltage output current 200ma-->1000ma output current 1000ma-->200ma output voltage rp506kxx1a/b/c (v in = 3.6 v, v out = 0.8 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 0.8 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 0.70 0. 7 5 0. 8 0 0. 8 5 0. 9 0 0. 9 5 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o u t p u t c u r r e n t i ou t (ma) output current 1000ma-->2000ma 0.70 0. 75 0. 80 0. 85 0. 90 0. 95 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o u t p u t c u r r e n t i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 3 9 rp506kxx1a/b/c (v in = 3.6 v, v out = 1.2 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 1.2 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 1.00 1. 1 0 1. 2 0 1. 3 0 - 20 0 20 4 0 60 80 100 120 140 16 0 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 100 0 150 0 ou tp u t c u r r e n t i ou t (ma) 1.00 1. 10 1. 20 1. 30 - 20 0 20 40 6 0 80 100 120 1 40 160 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output current 200ma-->1000ma output current 1000ma-->200ma output voltage output voltage rp506kxx1a/b/c (v in = 3.6 v, v out = 1.2 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 1.2 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 1.00 1. 1 0 1. 2 0 1. 3 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 1.00 1. 10 1. 20 1. 30 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1a/b/c (v in = 3.6 v, v out = 1.2 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 1.2 v) 1.00 1. 1 0 1. 2 0 1. 3 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) output current 1000ma-->2000ma 1.00 1. 10 1. 20 1. 30 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 40 rp506kxx1a/b/c (v in = 3.6 v, v out = 1.8 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 1.8 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 1.60 1. 7 0 1. 8 0 1. 9 0 2. 0 0 - 20 0 20 4 0 60 80 100 120 140 16 0 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 100 0 150 0 ou tp u t c u r r e n t i ou t (ma) 1.60 1. 70 1. 80 1. 90 2. 00 - 20 0 20 40 6 0 80 100 120 1 40 160 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output current 200ma-->1000ma output current 1000ma-->200ma output voltage output voltage rp506kxx1a/b/c (v in = 3.6 v, v out = 1.8 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 1.8 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 1.60 1. 7 0 1. 8 0 1. 9 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 1.60 1. 70 1. 80 1. 90 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1a/b/c (v in = 3.6 v, v out = 1.8 v) rp506kxx1a/b/c (v in = 3.6 v, v out = 1.8 v) 1.60 1. 7 0 1. 8 0 1. 9 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) output current 1000ma-->2000ma 1.60 1. 70 1. 80 1. 90 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 4 1 rp506kxx1a/b/c (v in = 5.0 v, v out = 3.3 v) rp506kxx1a/b/c (v in = 5.0 v, v out = 3.3 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 3.10 3. 2 0 3. 3 0 3. 4 0 3. 5 0 - 20 0 20 4 0 60 80 100 120 140 16 0 180 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 100 0 150 0 o ut put cur r e nt i ou t (ma) 3.10 3. 20 3. 30 3. 40 3. 50 - 20 0 20 40 6 0 80 100 120 1 40 160 180 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o ut put cur r e nt i ou t (ma) output current 200ma-->1000ma output current 1000ma-->200ma output voltage output voltage rp506kxx1a/b/c (v in = 5.0 v, v out = 3.3 v) rp506kxx1a/b/c (v in = 5.0 v, v out = 3.3 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 3.10 3. 2 0 3. 3 0 3. 4 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 3.10 3. 20 3. 30 3. 40 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1a/b/c (v in = 5.0 v, v out = 3.3 v) rp506kxx1a/b/c (v in = 5.0 v, v out = 3.3 v) 3.10 3. 2 0 3. 3 0 3. 4 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) 3.10 3. 20 3. 30 3. 40 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 42 rp506kxx1d/e/f (v in = 3.6 v, v out = 0.6 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 0.6 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 0.50 0. 5 5 0. 6 0 0. 6 5 0. 7 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 50 0 10 00 15 00 ou tp u t c u r r e n t i ou t (ma) 0.50 0. 55 0. 60 0. 65 0. 70 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output voltage output current 200ma-->1000ma output current 1000ma-->200ma output voltage rp506kxx1d/e/f (v in = 3.6 v, v out = 0.6 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 0.6 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 0.50 0. 5 5 0. 6 0 0. 6 5 0. 7 0 0. 7 5 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 0.50 0. 55 0. 60 0. 65 0. 70 0. 75 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1d/e/f (v in = 3.6 v, v out = 0.6 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 0.6 v) 0.50 0. 5 5 0. 6 0 0. 6 5 0. 7 0 0. 7 5 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) 0.50 0. 55 0. 60 0. 65 0. 70 0. 75 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output voltage output voltage output current 1000ma-->2000ma output current 2000ma-->1000ma
rp506x no.ea-2 96-1 3092 5 4 3 rp506kxx1d/e/f (v in = 3.6 v, v out = 0.8 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 0.8 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 0.70 0. 7 5 0. 8 0 0. 8 5 0. 9 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 50 0 10 00 15 00 ou tp u t c u r r e n t i ou t (ma) 0.70 0. 75 0. 80 0. 85 0. 90 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output voltage output current 200ma-->1000ma output current 1000ma-->200ma output voltage rp506kxx1d/e/f (v in = 3.6 v, v out = 0.8 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 0.8 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 0.70 0. 7 5 0. 8 0 0. 8 5 0. 9 0 0. 9 5 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 0.70 0. 75 0. 80 0. 85 0. 90 0. 95 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1d/e/f (v in = 3.6 v, v out = 0.8 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 0.8 v) 0.70 0. 7 5 0. 8 0 0. 8 5 0. 9 0 0. 9 5 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) output current 1000ma-->2000ma 0.70 0. 75 0. 80 0. 85 0. 90 0. 95 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 44 rp506kxx1d/e/f (v in = 3.6 v, v out = 1.2 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 1.2 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 1.00 1. 1 0 1. 2 0 1. 3 0 - 20 0 20 4 0 60 80 100 120 140 16 0 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 100 0 150 0 ou tp u t c u r r e n t i ou t (ma) 1.00 1. 10 1. 20 1. 30 - 20 0 20 40 6 0 80 100 120 1 40 160 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output current 200ma-->1000ma output current 1000ma-->200ma output voltage output voltage rp506kxx1d/e/f (v in = 3.6 v, v out = 1.2 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 1.2 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 1.00 1. 1 0 1. 2 0 1. 3 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 1.00 1. 10 1. 20 1. 30 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1d/e/f (v in = 3.6 v, v out = 1.2 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 1.2 v) 1.00 1. 1 0 1. 2 0 1. 3 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) output current 1000ma-->2000ma 1.00 1. 10 1. 20 1. 30 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 4 5 rp506kxx1d/e/f (v in = 3.6 v, v out = 1.8 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 1.8 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 1.60 1. 7 0 1. 8 0 1. 9 0 2. 0 0 - 20 0 20 4 0 60 80 100 120 140 16 0 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 100 0 150 0 ou tp u t c u r r e n t i ou t (ma) 1.60 1. 70 1. 80 1. 90 2. 00 - 20 0 20 40 6 0 80 100 120 1 40 160 180 ti m e t ( s) o u t p ut v o lt a g e v ou t (v) 0 500 1000 1500 ou tp u t c u r r e n t i ou t (ma) output current 200ma-->1000ma output current 1000ma-->200ma output voltage output voltage rp506kxx1d/e/f (v in = 3.6 v, v out = 1.8 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 1.8 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 1.60 1. 7 0 1. 8 0 1. 9 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 1.60 1. 70 1. 80 1. 90 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1d/e/f (v in = 3.6 v, v out = 1.8 v) rp506kxx1d/e/f (v in = 3.6 v, v out = 1.8 v) 1.60 1. 7 0 1. 8 0 1. 9 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) output current 1000ma-->2000ma 1.60 1. 70 1. 80 1. 90 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 46 rp506kxx1d/e/f (v in = 5.0 v, v out = 3.3 v) rp506kxx1d/e/f (v in = 5.0 v, v out = 3.3 v) mode = ?l ?pwm/vfm auto s w i t c hing control mode = ?l ?pwm/vfm auto s w i t c hing control 3.10 3. 2 0 3. 3 0 3. 4 0 3. 5 0 - 20 0 20 4 0 60 80 100 120 140 16 0 180 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 100 0 150 0 o ut put cur r e nt i ou t (ma) 3.10 3. 20 3. 30 3. 40 3. 50 - 20 0 20 40 6 0 80 100 120 1 40 160 180 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o ut put cur r e nt i ou t (ma) output current 200ma-->1000ma output current 1000ma-->200ma output voltage output voltage rp506kxx1d/e/f (v in = 5.0 v, v out = 3.3 v) rp506kxx1d/e/f (v in = 5.0 v, v out = 3.3 v) mode = ?h? forced p w m contr ol mode = ?h? forced p w m contr ol 3.10 3. 2 0 3. 3 0 3. 4 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( s) o u t p ut v o lt a ge v ou t (v) 0 50 0 10 00 15 00 o ut put c u r r ent i ou t (ma) 3.10 3. 20 3. 30 3. 40 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( s) o u t p ut v o lt ag e v ou t (v) 0 500 1000 1500 o u t p u t c u r r e n t i ou t (ma) output voltage output voltage output current 200ma-->1000ma output current 1000ma-->200ma rp506kxx1d/e/f (v in = 5.0 v, v out = 3.3 v) rp506kxx1d/e/f (v in = 5.0 v, v out = 3.3 v) 3.10 3. 2 0 3. 3 0 3. 4 0 - 20 0 20 40 60 80 100 120 140 1 60 180 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 10 00 20 00 30 00 o ut put cur r e nt i ou t (ma) output current 1000ma-->2000ma 3.10 3. 20 3. 30 3. 40 - 20 0 20 40 60 80 100 120 140 160 18 0 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 1000 2000 3000 o ut put cur r e nt i ou t (ma) output current 2000ma-->1000ma output voltage output voltage
rp506x no.ea-2 96-1 3092 5 4 7 20) auto switching control waveform r p 5 0 6 k x x 1 a / b / c r p 5 0 6 k x x 1 a / b / c ( v in = 3.6 v , v out = 1.2 v , i out = 1 m a ) ( v in = 3.6 v , v out = 1.2 v , i out = 1 m a ) mode = ?l ? -- > mo de = ? h? mode = ?h ? -- > mo de = ?l ? 1.15 1. 20 1. 25 1. 30 - 100 0 10 0 200 300 400 5 00 600 700 80 0 900 ti m e t ( u s ) o u t p ut v o lt age v ou t (v) 0 2 4 6 m o d e in p u t v o l ta g e v mo d e (v) output voltage mode input voltage 1.15 1. 20 1. 25 1. 30 - 10 0 0 100 20 0 300 400 500 60 0 700 800 900 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 2 4 6 m o d e in p u t v o l ta g e v mo de (v) output voltage mode input voltage r p 5 0 6 k x x 1 a / b / c r p 5 0 6 k x x 1 a / b / c (v in = 3.6 v , v out = 1.8 v , i out = 1 m a ) ( v in = 3.6 v , v out = 1.8 v , i out = 1 m a ) mode = ?l ? -- > mo de = ?h ? mode = ?h ? -- > mo de = ?l ? 1.75 1. 80 1. 85 1. 90 1. 95 2. 00 - 100 0 100 200 300 4 00 500 600 700 80 0 900 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 2 4 6 m o d e in p u t v o l ta g e v mo de (v) output voltage mode input voltage 1.75 1. 80 1. 85 1. 90 1. 95 2. 00 - 100 0 10 0 200 300 400 50 0 6 00 700 800 900 ti m e t ( u s ) o u t p ut v o lt ag e v ou t (v) 0 2 4 6 m o d e in p u t v o l ta g e v mo de (v) output voltage mode input voltage
rp506x no.ea-2 96-1 3092 5 48 rp506kx x1d/e/f rp506 kxx 1 d/e/f ( v in = 3.6 v , v out = 1.2 v , i out = 1 m a) (v in = 3.6 v , v out = 1.2 v , i out = 1 m a ) mode = ?l ? -- > mo de = ?h ? mode = ?h ? -- > mo de = ?l ? 1.15 1. 20 1. 25 1. 30 -20 0 0 2 00 40 0 6 00 80 0 10 00 1 20 0 14 00 16 00 1 80 0 ti m e t ( u s ) o ut put v o lt age v ou t (v) 0 2 4 6 m o de i n pu t v ol t ag e v mo d e v) output voltage mode input voltage 1.15 1. 20 1. 25 1. 30 -2 00 0 20 0 4 00 6 00 80 0 1 00 0 1 20 0 14 00 16 00 1 80 0 ti m e t ( u s ) o u t p ut v ol t a ge v ou t (v) 0 2 4 6 m od e i n put v o lt age v mo d e (v) output voltage mode input voltage rp506kx x1 d/e/f rp506kxx 1d/e/f (v in = 3.6 v , v out = 1.8 v , i out = 1 m a) (v in = 3.6 v , v out = 1.8 v , i out = 1m a) mode = ?l ? -- > mo de = ?h ? mode = ?h ? -- > mo de = ?l ? 1. 75 1.80 1. 85 1. 90 1. 95 2. 00 - 2 00 0 20 0 4 00 6 00 80 0 1 00 0 1 20 0 14 00 16 00 1 80 0 ti m e t ( u s ) o u t p ut v ol t a ge v ou t (v) 0 2 4 6 m od e i n put v o lt age v mo d e (v) out put v ol t age mode i nput v ol t age 1. 75 1.80 1. 85 1. 90 1. 95 2. 00 - 2 00 0 2 00 40 0 60 0 80 0 10 00 12 00 1 40 0 1 60 0 1 80 0 ti m e t ( u s ) o u t p ut v ol t a ge v ou t (v) 0 2 4 6 m od e i n put v o lt age v mo d e (v) ou tp u t v o l t a g e mode i nput v ol t age
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