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r1211x series step-up dc/dc controller no.ea-088-0604 1 outline the r1211x series are cmos-based pwm step-up dc/ dc converter controllers with low supply current. each of the r1211x series consists of an oscillator, a pwm control circuit, a reference voltage unit, an error amplifier, a reference current unit, a protection circuit, and an under voltage lockout (uvlo) circuit. a low ripple, high efficiency step-up dc/dc converter can be composed of this ic with some external components, or an inductor, a diode, a power mosfet, divider resisters, and capacitors. phase compensation has been made internally in the r1211x002b/d series, while phase compensation can be made externally as for r1211x002a/c series. b/d version has stand-by mode. max duty cycle is internally fixed typically at 90%. soft start function is built-in, and soft-starting time is set typically at 9ms(a/b, 700khz version) or 10.5ms(c/d, 300khz version). as for the protection circuit, after the soft-starting time, if the maximum duty cycle is conti nued for a certain period, the r1211x series latch the external driver with its off state, or latch-type protection circuit works. the delay time for latch the state can be set with an external capacitor. to release the protection circuit, restart with power-on (voltage supplier is equal or less than uvlo detector threshold level), or once after making the circuit be stand-by with chip enable pin and enable the circuit again. features ? standby current ................................................typ. 0 a (for b/d version) ? input voltage range .........................................2.5v to 6.0v ? built-in latch-type protection function (output dela y time can be set with an external capacitor) ? two options of basic oscillator frequency ......300khz, 700khz ? max duty cycle.................................................typ. 90% ? high reference voltage accuracy .................... 1.5% ? u.v.l.o. threshold le vel ...................................typ. 2.2v (hys teresis typ. 0.13v) ? small packages ................................................sot-23-6 w or thin (package height max. 0.85mm) son-6 applications ? constant voltage power source for portable equipment. ? constant voltage power source for lcd and ccd.
r1211x 2 block diagrams version a/c version b/d v fb ampout ext v in gnd delay osc uvlo latch + - + - - - + - + - vref dtc v fb ce ext v in gnd dtc delay osc uvlo latch + - + - - - + - + - chip enable vref selection guide in the r1211x series, the oscillator frequency, the op tional function, and the package type for the ics can be selected at the user's request. the selection can be made with designating the part number as shown below; r1211x 002x -tr part number a b code contents a designation of package type: d: son-6 n: sot23-6w b designation of optional function a : 700khz, with ampout pin (external phase compensation type) b : 700khz, with ce pin (internal phase compensation type, with stand-by) c : 300khz, with ampout pin (external phase compensation type) d : 300khz, with ce pin (internal ph ase compensation type, with stand-by)
r1211x 3 pin configurations son-6 sot-23-6w top view bottom view 13 6 2 54 31 4 2 56 64 5 13 2 ext gnd v in (mark side) delay ampout/ce v fb pin descriptions pin no symbol pin description son6 sot23-6w 1 1 delay pin for external capacitor (for setting output delay of protection) 2 5 gnd ground pin 3 6 ext external fet drive pin (cmos output) 4 4 v in power supply pin 5 3 v fb feedback pin for monitoring output voltage 6 2 ampout or ce amplifier output pin(a/c version) or chip enable pin(b/d version, active at "h") * tab in the parts have gnd level. (they ar e connected to the reverse side of this ic.) do not connect to other wires or land patterns. absolute maximum ratings symbol item rating unit v in v in pin voltage 6.5 v v ext ext pin output voltage ? 0.3 ~ v in + 0.3 v v dly delay pin voltage ? 0.3 ~ v in + 0.3 v v amp ampout pin voltage ? 0.3 ~ v in + 0.3 v v ce ce pin input voltage ? 0.3 ~ v in + 0.3 v v fb v fb pin voltage ? 0.3 ~ v in + 0.3 v i amp ampout pin current 10 ma i ext ext pin inductor drive output current 50 ma power dissipation (sot-23-6w)* 430 p d power dissipation (son-6)* 500 mw topt operating temperature range ? 40 ~ + 85 c tstg storage temperature range ? 55 ~ + 125 c * ) for power dissipation, please refer to package information to be described.
r1211x 4 electrical characteristics ? r1211x002a topt=25c symbol item conditions min. typ. max. unit v in operating input voltage 2.5 6.0 v v fb v fb voltage tolerance v in = 3.3v 0.985 1.000 1.015 v ? v fb / ? t v fb voltage temperature coefficient ? 40 c < = < = c 150 ppm/ c i fb v fb input current v in = 6v, v fb = 0v or 6v ? 0.1 0.1 a f os c oscillator frequency v in = 3.3v, v dly = v fb = 0v 595 700 805 khz ? f os c/ ? t oscillator frequency temperature coefficient ? 40 c < = < = c 1.4 khz/ c i dd1 supply current 1 v in = 6v, v dly = v fb = 0v, ext at no load 600 900 a maxdty maximum duty cycle v in = 3.3v, ext "h" side 82 90 94 % r exth ext "h" on resistance v in = 3.3v, i ext = ? 20ma 5 10 ? r extl ext "l" on resistance v in = 3.3v, i ext = 20ma 3 6 ? i dly1 delay pin charge current v in = 3.3v, v dly = v fb = 0v 2.5 5.0 7.5 a i dly2 delay pin discharge current v in = v fb = 2.5v, v dly = 0.1v 2.5 5.5 9.0 ma v dly delay pin detector threshold v in = 3.3v, v fb = 0v,v dly = 0v 2v 0.95 1.00 1.05 v t start soft-start time v in = 3.3v at 90% of rising edge 4.5 9.0 13.5 ms v uvlo1 uvlo detector threshold v in = 3.3v 0v, v dly = v fb = 0v 2.1 2.2 2.3 v v uvlo2 uvlo detector hysteresis v in = 0v 3.3v, v dly = v fb = 0v 0.08 0.13 0.18 v i amp1 amp "h" output current v in = 3.3v, v amp = 1v, v fb =0.9v 0.45 0.90 1.50 ma i amp2 amp "l" output current v in = 3.3v, v amp = 1v, v fb = 1.1v 30 60 90 a
r1211x 5 ? r1211x002b topt=25c symbol item conditions min. typ. max. unit v in operating input voltage 2.5 6.0 v v fb v fb voltage tolerance v in = 3.3v 0.985 1.000 1.015 v ? v fb / ? t v fb voltage temperature coefficient ? 40 c < = < = c 150 ppm/ c i fb vfb input current v in = 6v, v fb = 0v or 6v ? 0.1 0.1 a f osc oscillator frequency v in = 3.3v, v dly = v fb = 0v 595 700 805 khz ? f osc / ? t oscillator frequency temperature coefficient ? 40 c < = < = c 1.4 khz/ c i dd1 supply current 1 v in = 6v, v dly = v fb =0v, ext at no load 600 900 a maxdty maximum duty cycle v in = 3.3v, ext "h" side 82 90 94 % r exth ext "h" on resistance v in = 3.3v, i ext =? 20ma 5 10 ? r extl ext "l" on resistance v in = 3.3v, i ext = 20ma 3 6 ? i dly1 delay pin charge current v in = 3.3v, v dly = v fb = 0v 2.5 5.0 7.5 a i dly2 delay pin discharge current v in = v fb =2.5v, v dly = 0.1v 2.5 5.5 9.0 ma v dly delay pin detector threshold v in = 3.3v, v fb = 0v, v dly = 0v 2v 0.95 1.00 1.05 v t start soft-start time v in = 3.3v 4.5 9.0 13.5 ms v uvlo1 uvlo detector threshold v in = 3.3v 0v, v dly = v fb = 0v 2.1 2.2 2.3 v v uvlo2 uvlo detector hysteresis v in = 0v 3.3v, v dly = v fb = 0v 0.08 0.13 0.18 v i stb standby current v in = 6v, v ce = 0v 0 1 a i ceh ce "h" input current v in = 6v, v ce = 6v ? 0.5 0.5 a i cel ce "l" input current v in = 6v, v ce = 0v ? 0.5 0.5 a v ceh ce "h" input voltage v in = 6v, v ce = 0v 6v 1.5 v v cel ce "l" input voltage v in = 2.5v, v ce = 2v 0v 0.3 v
r1211x 6 ? r1211x002c topt=25c symbol item conditions min. typ. max. unit v in operating input voltage 2.5 6.0 v v fb v fb voltage tolerance v in = 3.3v 0.985 1.000 1.015 v ? v fb / ? t v fb voltage temperature coefficient ? 40 c < = < = c 150 ppm/c i fb vfb input current v in = 6v, v fb = 0v or 6v ? 0.1 0.1 a f osc oscillator frequency v in = 3.3v, v dly = v fb = 0v 240 300 360 khz ? f osc / ? t oscillator frequency temperature coefficient ? 40 c < = < = c 0.6 khz/c i dd1 supply current 1 v in = 6v, v dly = v fb = 0v, ext at no load 300 500 a maxdty maximum duty cycle v in = 3.3v, ext "h" side 82 90 94 % r exth ext "h" on resistance v in = 3.3v, iext =? 20ma 5 10 ? r extl ext "l" on resistance v in = 3.3v, iext = 20ma 3 6 ? i dly1 delay pin charge current v in = 3.3v, v dly = v fb = 0v 2.0 4.5 7.0 a i dly2 delay pin discharge current v in = v fb = 2.5v, v dly = 0.1v 2.5 5.5 9.0 ma v dly delay pin detector threshold v in = 3.3v, v fb = 0v, v dly = 0v 2v 0.95 1.00 1.05 v t start soft-start time v in = 3.3v 5.0 10.5 16.0 ms v uvlo1 uvlo detector threshold v in = 3.3v 0v, v dly = v fb = 0v 2.1 2.2 2.3 v v uvlo2 uvlo detector hysteresis v in = 0v 3.3v, v dly = v fb = 0v 0.08 0.13 0.18 v i amp1 amp "h" output current v in = 3.3v, v amp = 1v, v fb = 0.9v 0.45 0.90 1.50 ma i amp2 amp "l" output current v in = 3.3v, v amp = 1v, v fb = 1.1v 25 50 75 a
r1211x 7 ? r1211x002d topt=25c symbol item conditions min. typ. max. unit v in operating input voltage 2.5 6.0 v v fb v fb voltage tolerance v in = 3.3v 0.985 1.000 1.015 v ? v fb / ? t v fb voltage temperature coefficient ? 40 c < = < = c 150 ppm/ c i fb v fb input current v in = 6v, v fb = 0v or 6v ? 0.1 0.1 a f osc oscillator frequency v in = 3.3v, v dly = v fb = 0v 240 300 360 khz ? f osc / ? t oscillator frequency temperature coefficient ? 40 c < = < = c 0.6 khz/ c i dd1 supply current 1 v in = 6v, v dly = v fb =0v, ext at no load 300 500 a maxdty maximum duty cycle v in = 3.3v, ext "h" side 82 90 94 % r exth ext "h" on resistance v in = 3.3v, iext =? 20ma 5 10 ? r extl ext "l" on resistance v in = 3.3v, iext = 20ma 3 6 ? i dly1 delay pin charge current v in = 3.3v, v dly = v fb = 0v 2.0 4.5 7.0 a i dly2 delay pin discharge current v in = v fb = 2.5v, v dly = 0.1v 2.5 5.5 9.0 ma v dly delay pin detector threshold v in = 3.3v, v fb = 0v, v dly = 0v 2v 0.95 1.00 1.05 v t start soft-start time v in = 3.3v 5.0 10.5 16.0 ms v uvlo1 uvlo detector threshold v in = 3.3v 0v, v dly = v fb = 0v 2.1 2.2 2.3 v v uvlo2 uvlo detector hysteresis v in = 0v 3.3v, v dly = v fb = 0v 0.08 0.13 0.18 v i stb standby current v in = 6v, v ce = 0v 0 1 a i ceh ce "h" input current v in = 6v, v ce = 6v ? 0.5 0.5 a i cel ce "l" input current v in =6v, v ce =0v ? 0.5 0.5 a v ceh ce "h" input voltage v in =6v, v ce =0v 6v 1.5 v v cel ce "l" input voltage v in =2.5v, v ce =2v 0v 0.3 v
r1211x 8 typical applications and technical notes v in delay gnd ext v fb ampout inductor r3 c4 c3 r1 r2 v out diode nmos c1 c2 c5 r4 nmos : irf7601 (international rectifier) inductor: ldr655312t-100 10 h (tdk) for r1211x002a : ldr655312t-220 22 h (tdk) for r1211x002c diode : crs02 (toshiba) c1 : 4.7 f (ceramic) c2 : 0.22 f (ceramic) c3 : 10 f (ceramic) c4 : 680pf (ceramic) c5 : 2200pf (ceramic) r1 : output voltage setting resistor 1 r2 : output voltage setting resistor 2 r3 : 30k ? r4 : 30k ? v in delay gnd ext v fb ce inductor r3 c4 c3 r1 r2 v out diode nmos c1 c2 ce control nmos : irf7601 (international rectifier) inductor: ldr655312t-100 10 h (tdk) for r1211x002b : ldr655312t-220 22 h (tdk) for r1211x002d diode : crs02 (toshiba) c1 : 4.7 f (ceramic) c2 : 0.22 f (ceramic) c3 : 10 f (ceramic) c4 : 680pf (ceramic) r1 : setting output voltage resistor 1 r2 : setting output voltage resistor 2 r3 : 30k ? [ note ] these example circuits may be applied to the output volt age requirement is 15v or less. if the output voltage requirement is 15v or more, ratings of nmos and diode as shown above is over t he limit, therefore, choose other external components.
r1211x 9 use a 1 f or more capacitance value of bypass capacitor between v in pin and gnd, c1 as shown in the typical applications above. ? in terms of the capacitor for setting delay time of the latch protection, c2 as shown in typical applications of the previous page, connect between delay pin and gnd pin of the ic with the minimum wiring distance. ? connect a 1 f or more value of capacitor between v out and gnd, c3 as shown in typical applications of the previous page. (recommended value is from 10 f to 22 f.) if the operation of the composed dc/dc converter may be unstable, use a tantalum type capacitor instead of ceramic type. ? connect a capacitor between v out and the dividing point, c4 as shown in typical applications of the previous page. the capacitance value of c4 depends on divider re sistors for output voltage setting. typical value is between 100pf and 1000pf. ? output voltage can be set with divider resistors for voltage setting, r1 and r2 as shown in typical applications of the previous page. refer to the next formula. output voltage = v fb (r1 + r2)/r2 r1 + r2=100k ? is recommended range of resistances. ? the operation of latch protection circuit is as follo ws: when the ic detects maximum duty cycle, charge to an external capacitor, c2 of delay pin starts. and maximum duty cycle continues and the voltage of d elay pin reaches delay voltage detector threshold, v dly , outputs "l" to ext pin and turns off the external power mosfet. to release the latch protection operation, make the ic be standby mode with ce pin and make it active in terms of b/d version. otherw ise, restart with power on. the delay time of latch protection can be calculated with c2, v dly , and delay pin charge current, i dly1 , as in the next formula. t=c2 v dly /i dly1 once after the maximum duty is detected and released before delay time, charge to the capacitor is halt and delay pin outputs "l". ? as for r1211x002a/c version, the values and positioni ng of c4, c5, r3, and r4 shown in the above diagram are just an example combination. these are for ma king phase compensation. if the spike noise of v out may be large, the spike noise may be picked into v fb pin and make the operation unstable. in this case, a resistor r3, shown in typical applications of the previous pa ge. the recommended resistance value of r3 is in the range from 10k ? to 50k ? . then, noise level will be decreased. ? as for r1211x002b/d version, ext pi n outputs gnd level at standby mode. ? select the power mosfet, the diode, and the inductor within ratings (voltage, current, power) of this ic. choose the power mosfet with low threshold voltage depending on input voltage to be able to turn on the fet completely. choose the diode with low v f such as shottky type with low reverse current i r , and with fast switching speed. when an external transistor is switching, spike voltage may be generated caused by an inductor, therefore recommended voltage tolerance of capacitor connected to v out is three times of setting voltage or more. ? the performance of power circuit with using this ic depends on external components. choose the most suitable components for your application.
r1211x 10 output current and selection of external components i1 cl l x tr v in i out v out i2 inductor gnd diode discontinuous mode continuous mode il ilxmax ilxmin tf t to n t=1/fosc to ff il ilxmax ilxmin t to n t=1/fosc iconst to ff there are two modes, or discontinuous mode and continuou s mode for the pwm step-up switching regulator depending on the continuous characte ristic of inductor current. during on time of the transistor, when the voltage added on to the inductor is described as v in , the current is v in t/l. therefore, the electric power, p on , which is supplied with input side, can be described as in next formula. dt t/l v p 2 in ton 0 on = .............................................................................................................................. f ormula 1 with the step-up circuit, electric power is supplied from power source also during off time. in this case, input current is described as (v out ? v in ) t/l, therefore electric power, p off is described as in next formula. dt t/l ) v (v v p in out in tf 0 off ? = ........................................................................................................ form ula 2 in this formula, tf means the time of which the energ y saved in the inductance is being emitted. thus average electric power, p av is described as in the next formula. dt} t/l ) v (v v dt t/l v { ) t 1/(t p in out in tf 0 2 in ton 0 off on av ? + + = ................................................... form ula 3 in pwm control, when tf = toff is true, the induc tor current becomes contin uos, then the operation of switching regulator becomes continuous mode. in the continuous mode, the deviation of the current is equal between on time and off time. toff/l ) v (v /l v in out on in ? = t ................................................................................................... formula 4 further, the electric power, p av is equal to output electric power, v out i out , thus, {} ) v l /(2 t v ) v (v l 2 / t v f i out on 2 in in out 2 on 2 in osc out = ? = .................................................... form ula 5
r1211x 11 when i out becomes more than formula 5, the current flows through the inductor, then the mode becomes continuous. the continuous current through t he inductor is described as iconst, then, {} out in in out 2 on 2 in osc out iconst/v v ) v (v l 2 / t v f i + ? = ...............................................................formula 6 in this moment, the peak current, il xmax flowing through the inductor and the driver tr. is described as follows: /l t v iconst ilxmax on in + = .................................................................................................................form ula 7 with the formula 4,6, and ilxmax is, l) /(2 t v i /v v ilxmax on in out in out + = ..............................................................................................formula 8 therefore, peak current is more than i out . considering the value of ilxmax, the condition of input and output, and external components should be selected. in the formula 7, peak current ilxmax at di scontinuous mode can be calculated. put iconst = 0 in the formula. the explanation above is based on the ideal calculation, and the loss caused by lx switch and external components is not included. the actual maximum output current is between 50% and 80% of the calculation. especially, when the ilx is large, or v in is low, the loss of v in is generated with the on resistance of the switch. as for v out , vf (as much as 0.3v) of the diode should be considered.
r1211x 12 timing chart ? r1211x002a/r1211x002c r1 r2 v out v fb + - v ref ampout - + - - ss dtc ext pwm comparator ext op amp ? r1211x002b/r1211x002d r1 r2 v out v fb + - v ref ampout - + - - ss dtc ext pwm comparator ext op amp soft-start operation is starting from power-on as follows: (step1) the voltage level of ss is rising gradually by constant current circuit of the ic and a capacitor. v ref level which is input to op amp is also gradually rising. v out is rising up to input voltage level just after the power-on, therefore, v fb voltage is rising up to the setting voltage with input voltage and the ration of r1 and r2. ampout is at "l", and switching does not start. (step2) when the voltage level of ss becomes the setting voltage with the ration of r1 and r2 or more, switching operation starts. v ref level gradually increases together with ss level. v out is also rising with balancing v ref and v fb . duty cycle depends on the lowest level among ampout , ss, and dtc of the 4 input terminals in the pwm comparator.
r1211x 13 (step3) when ss reaches 1v, soft-start operation finishes. v ref becomes constant voltage (=1v). then the switching operation becomes normal mode. ss v fb ,v ref dtc ampout ampout ss,v ref step1 step2 step3 v fb v out v in the operation of latch protection circuit is as fo llows: when ampout becomes "h" and the ic detects maximum duty cycle, charge to an external capacito r, c2 of delay pin starts. and maximum duty cycle continues and the voltage of delay pin re aches delay voltage detector threshold, v dly , outputs "l" to ext pin and turns off the external power mosfet. to release the latch protection operation, make the ic be standby mode with ce pin and make it active in terms of r1211x002b/d version. othe rwise, make supply voltage down to uvlo detector threshold or lower, and make it rise up to the normal input voltage. during the soft-start time, if the duty cycle may be th e maximum, protection circuit does not work and delay pin is fixed at gnd level. the delay time of latch protection can be calculated with c2, v dly , and delay pin charge current, i dly1 , as in the next formula. t=c2 v dly /i dly1 once after the maximum duty is detected and released bef ore delay time, charge to the capacitor is halt and delay pin outputs "l". ampout ampout dtc output short normal latched maxduty operation ext delay v dly
r1211x 14 test circuits ? r1211x002a/r1211x002c ? oscillator frequency, maximum duty cycle, v fb voltage test ? consumption current test oscilloscope v in gnd ext v fb delay 3.3v v in gnd v fb delay 6v a ? ext "h" on resistance ? ext "l" on resistance oscilloscope v in gnd ext v fb delay 3.3v 150 ? v in gnd ext v fb delay 3.3v 150 ? v ? delay pin charge current ? delay pin discharge current v in gnd v fb delay 3.3v a v in gnd v fb delay 2.5v a 0.1v
r1211x 15 ? delay pin detector threshold voltage test ? amp "h" output current/"l" output current test oscilloscope v in gnd ext v fb delay 3.3v v in gnd ampout v fb delay 3.3v a 0.9v/1.1v 1v ? uvlo detector threshold/hysteresis range test oscilloscope v in gnd ext v fb delay ? soft-start time test v in gnd ext ampout v fb delay coil c5 c2 oscilloscope c4 r4 r3 c1 r1 r2 rout v out diode nmos c3 inductor (l) : 22 h (tdk ldr655312t-220) diode (sd) : crs02 (toshiba) capacitors c1:68 0pf(ceramic), c2:22 f (tantalum) + 2.2 f (ceramic), c3:68 f (tantalum) + 2.2 f (ceramic), c4:2200pf(ceramic), c5:22 f(tantalum) nmos transistor : irf760 1 (international rectifier) resistors : r1: 90k ? , r2:10k ? , r3:30k ? , r4:30k ? , rout:1k ? /330 ?
r1211x 16 ? r1211x002b/r1211x002d ? oscillator frequency, ? consumption current test maximum duty cycle, v fb voltage test oscilloscope v in gnd ext ce v fb delay 3.3v v in gnd ce v fb delay 6v a ? ext "h" on resistance ? ext "l" on resistance oscilloscope v in gnd ext ce v fb delay 3.3v 150 ? v in gnd ext ce v fb delay 3.3v 150 ? v ? delay pin charge current ? delay pin discharge current v in gnd ce v fb delay 3.3v a v in gnd ce v fb delay 2.5v a 0.1v ? delay pin detector threshold voltage test ? standby current test v in gnd ext ce v fb delay 3.3v oscilloscope v in gnd ce v fb delay 6v a
r1211x 17 ? uvlo detector threshold/ ? ce "l" input current/"h" input current test hysteresis range test v in gnd ext ce v fb delay oscilloscope v in gnd ce v fb delay 6v a 0v/6v ? ce "l" input voltage/"h" input voltage test v in gnd ext ce v fb delay oscilloscope 2.5v/6v ? soft-start time test v in gnd ext ce v fb delay coil c5 c2 oscilloscope 0v/3.3v r3 c1 r1 r2 rout v out diode nmos c3 inductor (l) : 22 h (tdk ldr655312t-220) diode (sd) : crs02 (toshiba) capacitors c1 : 680pf (ceramic), c2: 22 f (tantalum) + 2.2 f (ceramic), c3 : 68 f (tantalum) + 2.2 f (ceramic), c5: 22 f (tantalum) nmos transistor : irf760 1 (international rectifier) resistors : r1: 90k ? , r2: 10k ? , r3: 30k ?
r1211x 18 typical characteristics 1) output voltage vs. output current r1211x002a r1211x002a 4.9 5.1 5.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=10 h v out =5v v in =2.5v v in =3.3v 9.8 10.2 10.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=10 h v out =10v v in =2.5v v in =3.3v v in =5.0v r1211x002a r1211x002b 14.7 15.3 15.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=10 h v out =15v v in =2.5v v in =3.3v v in =5.0v 4.9 5.1 5.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=10 h v out =5v v in =2.5v v in =3.3v r1211x002b r1211x002b 9.8 10.2 10.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=10 h v out =10v v in =2.5v v in =3.3v v in =5.0v 14.7 15.3 15.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=10 h v out =15v v in =2.5v v in =3.3v v in =5.0v
r1211x 19 r1211x002c r1211x002c 4.9 5.1 5.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=22 h v out =5v v in =2.5v v in =3.3v 9.8 10.2 10.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=22 h v out =10v v in =2.5v v in =3.3v v in =5.0v r1211x002c r1211x002d 14.7 15.3 15.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=22 h v out =15v v in =2.5v v in =3.3v v in =5.0v 4.9 5.1 5.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=22 h v out =5v v in =2.5v v in =3.3v r1211x002d r1211x002d 9.8 10.2 10.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=22 h v out =10v v in =2.5v v in =3.3v v in =5.0v 14.7 15.3 15.0 output current i out (ma) output voltage v out (v) 1 10 100 1000 l=22 h v out =15v v in =2.5v v in =3.3v v in =5.0v
r1211x 20 2) efficiency vs. output current r1211x002a r1211x002a 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=10 h v out =5v v in =2.5v v in =3.3v 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=10 h v out =10v v in =2.5v v in =3.3v v in =5.0v r1211x002a r1211x002b 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=10 h v out =15v v in =2.5v v in =3.3v v in =5.0v 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=10 h v out =5v v in =2.5v v in =3.3v r1211x002b r1211x002b 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=10 h v out =10v v in =2.5v v in =3.3v v in =5.0v 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=10 h v out =15v v in =2.5v v in =3.3v v in =5.0v
r1211x 21 r1211x002c r1211x002c 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=22 h v out =5v v in =2.5v v in =3.3v 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=22 h v out =10v v in =2.5v v in =3.3v v in =5.0v r1211x002c r1211x002d 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=22 h v out =15v v in =2.5v v in =3.3v v in =5.0v 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=22 h v out =5v v in =2.5v v in =3.3v r1211x002d r1211x002d 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=22 h v out =10v v in =2.5v v in =3.3v v in =5.0v 0 20 40 100 60 80 output current i out (ma) efficiency (%) 1 10 100 1000 l=22 h v out =15v v in =2.5v v in =3.3v v in =5.0v
r1211x 22 3) v fb voltage vs. input voltage (topt=25c) r1211x002x input voltage v in (v) 1015 1010 1005 1000 995 990 985 23456 v fb voltage(mv) topt=25 c 4) oscillator frequency vs. input voltage (topt=25 c) r1211x002a/b r1211x002c/d input voltage v in (v) 900 600 800 700 500 23456 oscillator frequency(khz) topt=25 c input voltage v in (v) 400 250 350 300 200 23456 oscillator frequency(khz) topt=25 c 5) supply current vs. input voltage (topt=25 c) r1211x002a r1211x002b input voltage v in (v) 600 500 400 300 200 100 0 23456 supply current( a) topt=25 c input voltage v in (v) 600 100 200 400 500 300 0 23456 supply current( a) topt=25 c
r1211x 23 r1211x002c r1211x002d input voltage v in (v) 100 200 400 300 0 23456 supply current( a) topt=25 c input voltage v in (v) 100 200 400 300 0 23456 supply current( a) topt=25 c 6) maximum duty cycle vs. input voltage (topt=25 c) r1211x002a/b r1211x002c/d input voltage v in (v) 84 86 88 90 94 96 92 80 82 23456 maximum duty cycle( % ) topt=25 c input voltage v in (v) 84 86 88 90 94 96 92 80 82 23456 maximum duty cycle( % ) topt=25 c 7) v fb voltage vs. temperature r1211x002x temperature topt( c) 985 990 995 1000 1010 1015 1005 - 50 - 25 0 25 75 50 100 v fb voltage(mv) v in =3.3v
r1211x 24 8) oscillator frequency vs. temperature r1211x002a/b r1211x002c/d temperature topt( c) 500 600 700 800 900 - 50 - 25 0 25 75 50 100 oscillator frequency(khz) v in =3.3v temperature topt( c) 200 250 300 350 400 - 50 - 25 0 25 75 50 100 oscillator frequency(khz) v in =3.3v 9) supply current vs. temperature r1211x002a r1211x002b temperature topt( c) 0 100 300 500 600 - 50 - 25 0 25 75 50 100 supply current(a) 400 200 v in =3.3v temperature topt( c) 0 100 300 500 600 - 50 - 25 0 25 75 50 100 supply current( a) 400 200 v in =3.3v r1211x002c r1211x002d temperature topt( c) 0 100 300 400 - 50 - 25 0 25 75 50 100 supply current( a) 200 v in =3.3v temperature topt( c) 0 100 300 400 - 50 - 25 0 25 75 50 100 supply current( a) 200 v in =3.3v
r1211x 25 10) maximum duty cycle vs. temperature r1211x002a/b r1211x002c/d 84 86 88 90 94 96 92 80 82 maximum duty cycle(%) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 84 86 88 90 94 96 92 80 82 maximum duty cycle(%) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 11) ext "h" on resistance vs. temperature r1211x002x 4 5 6 7 8 2 3 ext "h" on resistance( ? ) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 12) ext "l" on resistance vs. temperature r1211x002x 3 4 5 1 2 ext "l" on resistance( ? ) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v
r1211x 26 13) soft-start time vs. temperature r1211x002a/b r1211x002c/d 10 14 12 16 6 8 soft-start time(ms) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 10 14 12 16 6 8 soft-start time(ms) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 14) uvlo detector threshold vs. temperature r1211x002x 2200 2250 2300 2100 2150 uvlo detector threshold(mv) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 15) amp "h" output current vs. temperature r1211x002a/c 800 1000 1200 1400 1600 400 600 amp "h" output current( a) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v
r1211x 27 16) amp "l" output current vs. temperature r1211x002a r1211x002c 40 50 60 70 80 20 30 amp "l" output current( a) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 40 50 60 70 80 20 30 amp "l" output current( a) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 17) delay pin charge current vs. temperature r1211x002a/b r1211x002c/d 4 6 5 7 2 3 delay pin charge current( a) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 4 6 5 7 2 3 delay pin charge current( a) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v 18) delay pin detector threshold vs. temperature r1211x002x 1020 1000 1040 960 980 delay pin detector threshold(mv) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =3.3v
r1211x 28 19) delay pin discharge current vs. temperature r1211x002x 4 8 6 10 0 2 delay pin discharge current( a) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =2.5v 20) ce "l" input voltage vs. temperature r1211x002b/d 800 900 1000 1100 1200 600 700 ce "l" input voltage(mv) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =2.5v 21) ce "h" input voltage vs. temperature r1211x002b/d 800 900 1000 1100 1200 600 700 ce "h" input voltage(mv) - 50 - 25 0 25 75 50 100 temperature topt( c) v in =6.0v
r1211x 29 22) standby current vs. temperature r1211x002b/d 0.4 0.8 0.6 1.0 -0.2 0.2 standby current( a) 0.0 - 50 - 25 0 25 75 50 100 temperature topt( c) v in =6.0v 23) load transient response r1211x002a 5.6 5.0 4.4 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=10 h v in =3.3v, c3=22 f v out =5v, i out =1-100ma v out i out r1211x002a
r1211x 30 r1211x002a 16.8 15.0 13.2 300 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=10 h v in =3.3v, c3=22 f v out =15v, i out =1-50ma v out i out r1211x002b 5.6 5.0 4.4 300 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=10 h v in =3.3v, c3=22 f v out =5v, i out =1-100ma v out i out r1211x002b 11.2 10.0 8.8 300 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=10 h v in =3.3v, c3=22 f v out =10v, i out =1-100ma v out i out
r1211x 31 r1211x002b v out i out 16.8 15.0 13.2 300 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=10 h v in =3.3v, c3=22 f v out =15v, i out =1-50ma r1211x002c 5.6 5.0 4.4 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=22 h v in =3.3v, c3=22 f v out =5v, i out =1-100ma v out i out r1211x002c 11.2 10.0 8.8 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=22 h v in =3.3v, c3=22 f v out =10v, i out =1-100ma v out i out
r1211x 32 r1211x002c 16.8 15.0 13.2 300 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=22 h v in =3.3v, c3=22 f v out =15v, i out =1-50ma v out i out r1211x002d 5.6 5.0 4.4 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=22 h v in =3.3v, c3=22 f v out =5v, i out =1-100ma v out i out r1211x002d 11.2 10.0 8.8 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=22 h v in =3.3v, c3=22 f v out =10v, i out =1-100ma v out i out
r1211x 33 r1211x002d 16.8 15.0 13.2 300 200 100 0 time (5ms/div) output current i out (ma) output voltage v out (v) l=22 h v in =3.3v, c3=22 f v out =15v, i out =1-50ma v out i out 24) power-on response r1211x002a r1211x002b 16 2 8 6 4 12 14 10 0 0 5 10 15 20 25 output voltage(v) time (5ms/div) l=10 h v in =3.3v, i out =10ma (c)v out =15v (b)v out =10v (a)v out =5v v in 16 2 8 6 4 12 14 10 0 0 5 10 15 20 25 output voltage(v) time (5ms/div) l=10 h v in =3.3v, i out =10ma (c)v out =15v (b)v out =10v (a)v out =5v v in r1211x002c r1211x002d 16 2 8 6 4 12 14 10 0 0 5 10 15 20 25 output voltage(v) time (5ms/div) l=22 h v in =3.3v, i out =10ma (c)v out =15v (b)v out =10v (a)v out =5v v in 16 2 8 6 4 12 14 10 0 0 5 10 15 20 25 output voltage(v) time (5ms/div) l=22 h v in =3.3v, i out =10ma (c)v out =15v (b)v out =10v (a)v out =5v v in
r1211x 34 25) turn-on speed with ce pin r1211x002b r1211x002d 16 2 8 6 4 12 14 10 0 0 5 10 15 20 25 output voltage(v) time (5ms/div) l=10 h v in =3.3v, i out =10ma (c)v out =15v (b)v out =10v (a)v out =5v ce 16 2 8 6 4 12 14 10 0 0 5 10 15 20 25 output voltage(v) time (5ms/div) l=22 h v in =3.3v, i out =10ma (c)v out =15v (b)v out =10v (a)v out =5v ce
package information pe-sot-23-6w-0512 ? sot-23-6w unit: mm package dimensions +0.1 ? 0.075 0.15 0.2 min. 4 5 2 6 1 1.9 0.2 0.8 0.1 0 to 0.1 0.4 +0.1 ? 0.2 1.1 +0.2 ? 0.1 2.9 0.2 2.8 0.3 1.8 0.2 (0.95) (0.95) taping specification 3.2 ? 1.1 0.1 5 64 2 13 2.0 0.05 4.0 0.1 0.3 0.1 ? 1.5 +0.1 0 3.3 4.0 0.1 2.0max. tr 8.0 0.3 1.75 0.1 user direction of feed 3.5 0.05 taping reel dimensions (1reel=3000pcs) 21 0.8 2 0.5 13 0.2 180 60 0 ? 1.5 +1 0 11.4 1.0 9.0 0.3
package information pe-sot-23-6w-0512 power dissipation (sot-23-6w) this specification is at mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurement at the condition below: measurement conditions standard land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plactic (double sided) board dimensions 40mm 40mm 1.6mm copper ratio top side : approx. 50% , back side : approx. 50% through-hole 0.5mm 44pcs measurement result (topt=25 c,tjmax=125 c) standard land pattern power dissipation 430mw thermal resistance ja = (125 ? 25 c)/0.43w = 233 c/w 0 50 100 25 75 85 125 150 ambient temperature ( c) 0 200 100 300 400 430 500 600 power dissipation p d (mw) on board 40 40 power dissipation measurement board pattern ic mount area unit : mm recommended land pattern (sot-23-6w) 0.7 max. 0.95 0.95 1.9 2.4 1.0 (unit: mm)
package information pe-son-6-0510 ? son-6 unit: mm package dimensions 3.0 0.15 2.6 0.2 0.13 0.05 1.6 0.2 0.2 0.1 0.85max. (0.3) 1.34 (0.3) attention: tab suspension leads in the parts have v dd or gnd level.(they are connected to the reverse side of this ic.) refer to pin discription. do not connect to other wires or land patterns. bottom view 0.1 0.5 1 3 6 4 taping specification 1.7max. 0.2 0.1 4.0 0.1 2.0 0.05 4.0 0.1 1.9 3.2 8.0 0.3 1.75 0.1 3.5 0.05 1.5 +0.1 0 ? ? 1.1 0.1 tr user direction of feed taping reel dimensions (1reel=3000pcs) 21 0.8 2 0.5 13 0.2 180 60 0 ? 1.5 +1 0 11.4 1.0 9.0 0.3
package information pe-son-6-0510 power dissipation (son-6) this specification is at mounted on board. power dissipation (p d ) depends on conditions of mounting on board. this specification is based on the measurement at the condition below: measurement conditions standard land pattern environment mounting on board (wind velocity=0m/s) board material glass cloth epoxy plactic (double sided) board dimensions 40mm 40mm 1.6mm copper ratio top side : approx. 50% , back side : approx. 50% through-hole 0.5mm 44pcs measurement result (topt=25 c,tjmax=125 c) standard land pattern free air power dissipation 500mw 250mw thermal resistance ja = (125 ? 25 c)/0.5w = 200 c/w - 0 50 100 25 75 85 125 150 ambient temperature ( c) 0 200 250 100 300 400 500 600 power dissipation p d (mw) free air on board 40 40 power dissipation measurement board pattern ic mount area (unit : mm) recommended land pattern 0.5 0.75 1.05 0.25 (unit: mm)
mark information me-r1211n-0310 r1211n series mark specification ? sot-23-6w 1234 1 , 2 : product code (refer to part number vs. product code) 3 , 4 : lot number ? part number vs. product code product code part number 1 2 r1211n002a l 0 r1211n002b l 1 r1211n002c l 2 r1211n002d l 3
mark information me-r1211d-0310 r1211d series mark specification ? son-6 1 2 3 4 1 , 2 : product code (refer to part number vs. product code) 3 , 4 : lot number ? part number vs. product code product code product code part number 1 2 part number 1 2 r1211d002a l 0 r1211d102a l 6 r1211d002b l 1 r1211d101c l 7 r1211d002c l 2 r1211d102c l 8 r1211d002d l 3 R1211D103A l 9 r1211d100a l 4 r1211d103c l a r1211d101a l 5 r1211d104a l b

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