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ap 3591 document number: ds 36906 rev. 1 - 2 1 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated single phase synchronous buck controller description the AP3591 is a synchronous adaptive on - time buck controller providing high efficiency, e xcellent transient response and high dc output accuracy for low voltage regulation in notebook application. the constant - on - time pwm control scheme handles wide input/output voltage ratios with ease and features small external component count and fast tra nsient response. the operation mode is selectable by en voltage. a diode emulation mode (dem) is activated for increasing efficiency at light loads, while pwm mode is activated only for low noise operation. the AP3591 also integrates internal soft - start , uvlo, ovp, otp, and programmable ocp to protect the circuit. a power good signal is employed to monitor the output voltage. the AP3591 is available in u - qfn3 5 3 5 - 1 4 package . features ? fixed frequency constant on - time control; resistor programmable frequency adjustable from 100khz to 700khz ? good stability independent of the output capacitor esr ? quick load step response ? input voltage range: 4.5v to 26v ? output voltage range: 0.75v to 5.5v ? ccm/dem mode selection ? integrated bootstrap diode ? resistor programmable current limit by low - side r ds_on sense ? integrated negative over current limit ? integrated ovp/uvp and over thermal shutdown function ? power good indicator ? internal soft - start ? integrate output d ischarge (soft - stop) ? safe start - up into pre - biased loads ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3 ) pin assignments (top v iew) u - qfn 3 5 3 5 - 1 4 applications ? notebook computer , aio pc ? low - voltage distribute power ? i/o supplies notes: 1. no purposely added lead. fully eu directive 2002/95/ec ( rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of halogen - and antimony - free, "green" and lead - free. 3. halogen - and antimony - free "green produ cts are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. vout vdd fb pgood g n d p g n d lgate e n / d e m ton b o o t ugate phase cs vddp p in 1 mark ep 1 14 2 3 4 5 6 7 8 9 10 11 12 13
ap 3591 document number: ds 36906 rev. 1 - 2 2 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated typical applications circuit bom symbol value description manufacturer part number c1 10f/25v esr < 4m @400khz murata grm31cr61e106ka12 c4 220f/6.3v esr < 9m @300khz sanyo 6svpe220m l 1.0h dcr < 4m, i max = 24a vishay ihlp5050ceer1r0m01 q1 n - mosfet i dmax = 30a, r ds(on) = infineon bsc119n03s q2 n - mosfet i dmax = 30a, r ds(on) = infineon bsc119n03s v d d p b o o t u g a t e l g a t e p h a s e v o u t p g o o d e n / d e m f b a p 3 5 9 1 1 3 1 4 1 2 9 5 4 g n d 7 l 1 . 0 c 4 2 2 0 m f r 1 c 2 c 1 1 0 m f t o n q 2 q 1 c 3 0 . 1 m f r 3 p g n d v d d v d d p c c m / d e m c s m h 1 2 3 6 8 1 0 1 1 1 m f c o p t i o n a l 1 0 r 2 1 0 0 k 2 5 0 k r 4 1 8 k 1 2 k r 5 r 6 3 0 k v o u t = 1 . 0 5 v = 1 2 v v i n
ap 3591 document number: ds 36906 rev. 1 - 2 3 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated pin description s pin number p in name function 1 en/dem enable/diode emulation mode control input. connect to vdd for dem mode; connect to gnd for shutdown and float the pin for ccm mode 2 ton on time/frequency adjustment pin. connect to phase through a resistor. ton is an input for the pwm controller 3 vout output voltage pin. connect to the output of pwm converter. vout is an input for the pwm controller 4 vdd analog supply voltage input for the internal analog integrated circuit. bypass to gnd with a 1f ceramic capacitor 5 fb feedback input pin. connect fb pin to a resistor voltage divi der from vout to gnd to adjust v out from 0.75v to 3.3v 6 pgood power good signal open - drain output for pwm converter. this pin will be pulled high when the output voltage is within the target range 7 gnd analog ground 8 pgnd power ground 9 lgate low - side n - mosfet gate driver output for the pwm converter. this pin swings between pgnd and vddp 10 vddp vddp is the gate driver supply for external mosfets. bypass to gnd with a 1f ceramic capacitor 11 cs over curren t trip point set input. connect a resistor from this pin to signal ground to set threshold for both over current limit and negative over current limit 12 phase the ugate high - side gate driver return. also serves as anode of over current comparator 13 ugate high - side n - mosfet floating gate driver output for the pwm converter. this pin swings between phase and boot 14 boot bootstrap pin. a bootstrap capacitor is connected for pwm converter. connect to an external ceramic capacitor to phase C exposed pad the exposed pad must be soldered to a large pcb and connected to gnd for maximum power dissipation
ap 3591 document number: ds 36906 rev. 1 - 2 4 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated functional block diagram m i n . t o f f 1 - s h o t q s 1 l a t c h o n - t i m e c o m p u t e 1 - s h o t t r i g g m v r e f s s ( i n t e r n a l ) 1 2 5 % v r e f 7 0 % v r e f q s 1 l a t c h o v u v t r i g q 9 0 % v r e f s s t i m e r t h e r m a l s h u t d o w n d i o d e e m u l a t i o n q r s d r v d r v g m 5 2 3 4 1 7 6 8 9 1 0 1 2 1 3 1 4 1 1 1 0 m a v o u t t o n f b e n / d e m g n d c s p g o o d p g n d l g a t e v d d p p h a s e u g a t e b o o t v d d
ap 3591 document number: ds 36906 rev. 1 - 2 5 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated absolute maximum ratings ( note 4 ) symbol parameter rating unit v dd , v ddp supply voltage - 0.3 to 6 v v bs boot pin voltage - 0.3 to v phase +6 v v ugate voltage from ugate to phase - 0.3 to 6 v v lgate voltage from lgate to gnd - 0.3 to 6 v v phase voltage from phase to gnd - 0.3 to 36 v v pgnd voltage from pgnd to gnd - 0.3 to 0.3 v C voltage from other pins to gnd - 0.3 to 6 v ? ja thermal resistance (junction to ambient) 60 ? c/w t j operating junction temperature + 150 ? c t stg storage temperature - 65 to + 1 50 ? c t lead lead temperature (soldering, 10secs) + 260 ? c v hbm esd ( human body model) 2000 v v mm esd ( machine model) 200 v note 4 : stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operati ng conditions is not implied. exposure to absolute maximum ratings for extended periods may affect device rel iability . recommended operating conditions symbol parameter min max unit v dd , v ddp supply voltage 4.5 5.5 v v in input voltage 4.5 26 v v out (max) maximum output voltage C 5.5 v t a operating ambient temperature - 40 + 85 oc
ap 3591 document number: ds 36906 rev. 1 - 2 6 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated electrical char acteristics ( v in = 12v, v dd = v ddp = 5v, v out = 1.05v, t a = + 25 o c , unless otherwise specified .) symbol parameter conditions min typ max unit supply input v in input voltage C 4.5 C 26 v i q - ccm quiescent current vdd+vddp current, ccm, en floating, v fb = 0.8v C 500 800 a i q - dem v dd +v ddp current, dem, v en = 5v, v fb = 0.8v C 500 800 a i shdn shutdown current v dd +v ddp current, dem, v en = 0v C 1 10 a on - time timer, oscillator frequency and soft start t on on time v phase = 12v, v out = 2.5v, r on = 200k 510 630 750 ns v phase = 12v, v out = 1.05v, r on = 200k 190 260 330 t off - min min off time C 250 400 580 ns t ss internal soft start time C 0.82 1.2 1.5 m s pwm controller gate drivers r u_ph upper gate pull - up resistance v boot - v phase = 5v, 50ma source current C 3.3 7 r u_gate upper gate sink resistance v boot - v phase = 5v, 50ma sink current C 1 3 r l_ph lower gate pull - up resistance C C 1.8 4 r l_gate lower gate sink resistance v boot - v phase = 5v, 50ma source current C 0.5 2 C phase falling to lg ate rising delay v phase < 1.2v to v lgate > 1.2v C 30 C ns C lgate falling to ugate rising delay v lgate < 1.2v to (v ugate - v phase ) > 1.2v C 30 C ns v boot boot diode forward voltage v ddp - v boot , i boot = 10ma 0.5 0.83 1 v i bslk v bs leakage current v boot = 3 4v, v phase = 28v C 0.1 1 a power good C pgood threshold pgood from low to high 92.5 95 97.5 % C pgood from high to low 102 105 107 % C pgood lower threshold hysteresis C C 5 C % v pg_l pgood low voltage C C C 0.4 v i pg_leak pgood output leakage cur rent v pgood = 5v C C 1 a t delay pgood delay time delay for pgood pin 16 22 36 s
ap 3591 document number: ds 36906 rev. 1 - 2 7 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated electrical characteristics ( cont. v in = 12v, v dd = v ddp = 5v, v out = 1.05v, t a = + 25 o c , unless otherwise specified .) symbol parameter conditions min typ max unit vout and reference voltage v out out put voltage C 0.75 C 5.5 v r discharge output discharge resistance v en = 0v C 20 C v fb feedback voltage v dd = 4.5v to 5.5v 0.742 0.75 0.758 v i fb feedback bias current v fb = 0.75v - 1 C 1 a protection i oc current limit source current cs to gnd 9 10 11 a C i oc temperature coefficient C C 4500 C ppm/ o c v ilim_set current limit sett ing voltage range cs to gnd 30 C 200 mv v ocl_offset over current limit comparator offset voltage v cs = 60mv, v cs - gnd - v pgnd - phase - 10 0 10 mv v zc_offset zero crossing comparator offset voltage v phase to gnd, v en = 5v - 10 0 10 mv v ucl_offset negative ove r current limit comparator offset voltage en floating, v cs = 60mv, v cs - gnd - v phase - pgnd - 10 0 10 mv v fbov /v fb feedback over voltage threshold C 120 125 130 % t fbov_d feedback over voltage delay time C C 33 C s v fbuv /v fb feedback under voltage threshol d C 65 70 75 % t fbuv_d feedback under voltage protection delay time C C 28 C s t fbuv_en_d feedback under voltage protection enable delay time C 1.3 2 3.1 ms v uvlo v dd under voltage lock threshold v dd rising 3.7 3.9 4.1 v v hys v dd under voltage lock hy steresis C C 300 C mv t otsd thermal shutdown C C + 160 C o c t hys thermal shutdown hysteresis C C + 20 C o c logic threshold v enh en control logic input voltage setting dem mode 2.4 2.65 2.9 v v enh - hys hysteresis C 25 C mv v en_ft setting pwm - only mode 1.9 1.96 2 v v enl shutdown threshold 0.8 1.24 1.6 v v enl - hys hysteresis C 65 C mv i en_ph en pull_up current v en = 0v C 1 C a
ap 3591 document number: ds 36906 rev. 1 - 2 8 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated performance characteristics efficiency vs. load current @v out = 1.05v efficie ncy vs. load current @v out = 2.5v efficiency vs. load current (ccm vs. dem) frequency vs. r t frequency vs. load current frequency vs. v in 0 2000 4000 6000 8000 10000 12000 0 20 40 60 80 100 efficiency (%) load current (ma) v in = 8v v in = 12v v in = 20v 5 10 15 20 25 30 100 150 200 250 300 350 400 frequency (khz) v in (v) v out = 1.05v@0a v out = 1.05v@10a v out = 2.5v@0a v out = 2.5v@10a 0 2000 4000 6000 8000 10000 12000 0 20 40 60 80 100 efficiency (%) load current (ma) dem ccm -2 0 2 4 6 8 10 12 14 16 100 150 200 250 300 350 400 frequency (khz) load current (a) v in = 8v v in = 12v v in = 20v 0 100 200 300 400 500 600 700 800 900 0 100 200 300 400 500 600 700 800 900 1000 1100 frequency (khz) r t ( ? ) v out = 1.05v v out = 2.5v 0 2000 4000 6000 8000 10000 12000 0 20 40 60 80 100 efficiency (%) load current (ma) v in = 8v v in = 12v v in = 20v
ap 3591 document number: ds 36906 rev. 1 - 2 9 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated performance characteristics (cont.) shutdown current vs. v in i cs vs. temperature ( ? power on from en @ccm power on from en @dem power on from vdd @ccm power on from vdd @dem v out 2v/div v phase 10v/div v en 1v/div i l 2.5a/div time 2 ms/div v out 2v/div v phase 10v/div v en 2v/div i l 5a/div time 1ms/div v out 2v/div v phase 10v/div v dd 1v/div i l 5a/div time 1ms/div v out 2v/div v phase 10v/div v dd 2v/div i l 5a/div time 1ms/div 6 8 10 12 14 16 18 20 22 24 26 0.0 0.5 1.0 1.5 2.0 shutdown current ( m a) v in (v) -40 -20 0 20 40 60 80 100 120 140 160 7 8 9 10 11 12 13 14 15 i cs ( m a) temperature ( o c)
ap 3591 document number: ds 36906 rev. 1 - 2 10 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated performance characteristics (cont.) ovp uvp mode transition dem to ccm mode transition ccm to dem load transient response @ ccm load transient response @ dem v out 2v/div v ug 5v/div v lg 5v/div v fb 1v/div time 2 00 s/div v out 2v/div v ug 5v/div i l 10a/div time 2 0 s/div v out 2v/div v phase 10v/div v en 2v/div time 4ms/div v out 2v/div v phase 10v/div v en 2v/div time 4ms/div v out 100mv/div i l 10a/div time 1ms/div v out 100mv/div i l 10a/div time 1ms/div v lg 10v/div
ap 3591 document number: ds 36906 rev. 1 - 2 11 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated application information 1. functional description the AP3591 is a sync hronous step - down controller. adaptive constant on time (cot) control is employed to provide fast transition response and easy loop stabilization. AP3591 does not have a dedicated in board oscillator. it runs with a pseudo - constant frequency which is set b y r on . the output voltage variation is sensed by fb pin. if v fb is below 0.75v, the error comparator will trigger the control logic and generate an on - time period, in which high side mosfet is turned on and low side mosfet is turned off. the on - time period length is calculated using the following equation: v out is the output voltage, v in is the input voltage, and f is the switching frequency. the on - time is the time required for the voltage on this capacitor charging from zero volt s to v out , thereby the on - time of the high side switch is directly proportional to the output voltage and inversely proportional to the input voltage. the implementation results in a nearly constant switching frequency without the need of a clock generator . t on = 14.5pr ton (v out +0.1)/v in +50ns after an on - time period, the AP3591 goes into the off - time period. the off - time period length depends on v fb in most case. it will end when v fb decreases below 0.75v and then the on - time period is triggered again. i f the off - time period is less than the minimum off time, the minimum off time will be applied, which is about 400ns typical. 2. mode selection operation AP3591 has two operation modes: continuous conduction mode (ccm) and diode emulation mode (dem). wh en the en/dem pin voltage is higher than 2.9v, AP3591 will operate in dem mode for high efficiency; when the en/dem pin is floating, AP3591 will operate i n forced ccm mode to a certain frequency during a light load condition. 2.1 diode emulation mod e if the dem mode is selected, the AP3591 automatically reduces the switching frequency under a light load condition to get hig h efficiency. when the output current decreases and heavy load condition is formed, the inductor current decreases as well, and e ventually comes close to zero current, which is the boundary between ccm and dem. the low side mosfet will turn off whenever the inductor current reaches z ero level. the load is provided only by the output capacitor. when fb voltage is lower than 0.75v, th e next on cycle is beginning. the on - time is kept the same as that in the heavy load condition. the switching frequency increases to keep v out voltage when the output current increases from light to heavy load. the transition load point is calculated using the following equation: t on is the on - time. 2.2 continuous conduction mode when AP3591 operates in ccm mode, the duty cycle v out /v in is not changed at light load condition. the low side mosfet keeps on even when inductor current decreases to reverse. the benefit of ccm is to keep the switching frequency fairly constant to avoid a certain frequency duri ng a light load condition. 3. power on reset and soft - start power on reset occurs when v dd rises above approximately 3.9v: the i c will reset the fault latch and prepare the pwm for operation. when v dd is below 3.6v, the vdd under voltage lockout (uvlo) circuitry inhibits switching by keeping ugate and lgate low. a built - in soft - start is used to prevent surge current from power supp ly input v in during turn on (referring to functional block diagram). the error amplifier is a three - input device. reference voltage v ref or the internal soft - start voltage v ss whichever is smaller dominates the behavior of the non - inverting inputs of the e rror amplifier. v ss internally ramps up to 95% of 0.75v in 1.2ms for AP3591 after the soft - start cycle is initiated. figure 1 shows a typical start - up interval for AP3591 when the en/dem pin has been released from a grounded (system shutdown) state. f ? ? in out on v v t on t ? ? ? 2l v v i out in load
ap 3591 document number: ds 36906 rev. 1 - 2 12 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated app lication information ( cont. ) power on from en (dem mode) figure 1 . start - up behavior of AP3591 4. power good output the AP3591 features power good output to monitor the output voltage. it is an open - drain output and should be c onnected to a 5v power supply node through a resistor. the power good function is active after the soft start is finished. pgood signal becomes high if out put voltage reaches 5% of the target value after 64 s delay building into the pgood circuitry. it wi ll become low immediately if the output voltage goes beyond 10% of the target value. 5. soft stop the AP3591 has a built in soft - stop circuitry. the output is discharged with an i nternal 20 transistor when en/dem is low or the device is in a fault condition including uvlo and otp. the discharge time constant is determined by the output capacitance and resistance of the discharge transistor. 6. pre - biased output figure 2 shows the normal v out start - up curve in blue; initialization begins at t0, and output ramps between t1 and t2. if the output is pre - biased to a voltage less than the expected value, as shown by the magenta curve, the AP3591 will detect that condition. neither mosf e t will turn on until the soft - start ramp voltage exceeds the output. v out starts seamlessly ramping from there. if the output is pre - biased to a voltage above the expected value, as showed in the black curve, neither mosfet will turn on until the output vo ltage is pulled down to the expected value through external load. any resistive load connected to the output will help pull down the voltage. figure 2. start - up behavior with pre - biased output voltage v out 1v/div v ugate 20v/div v en 2v/div v pgood 5v/div time 400 s/div t 0 t 1 t 2 v out normal v out pre - biased v out over - charged gnd
ap 3591 document number: ds 36906 rev. 1 - 2 13 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated application informati on ( cont. ) 7. over current protection (ocp) figure 3 shows the over current protection (ocp) scheme of AP3591. in each switching cycle, the inductor current is sensed by monitori ng the low - side mosfet in the off period. when the voltage between pgnd pin an d phase pin is larger than the over current trip level, the ocp is triggered and the controller keeps the off state. because the r ds(on) of mosfet increases with the temperature, i oc has 4500ppm/oc temperature coefficient to compensate this temperature dep endency of r ds(on) . figure 3 . over current scheme a resistor r oc - set should be connected from cs pin to gnd. an internal current source i oc (10 a typically), flowing through r oc - set determines the ocp trip point i ocset , which can be calculated us ing the following equation: the load current at over - current threshold (i o_ocset ), can be calculated using the following equation: v out is the output voltage, i l(pp) is the inductor current ripple peak to peak value and f is the switching fr equency. 8. negative over current protection (nocp) the AP3591 supports cycle by cycle negative over current limiting in ccm mode. the over current limit value is the same absol ute value as the positive over current limit. if the inductor reverse current is larger than nocp current at off time, the lmosfet is turned off. the reverse current will flows to vin through the body diode of hmosfet. after 400ns delay, lmosfet is turned on again. if the nocp is released, the hmosfet is turned on and the device re sumes normal operation. 9. under voltage protection (uvp) the output voltage is also monitored for under voltage protection. when the output voltage is less than 70% of the setting vo ltage threshold, under voltage protection is triggered after 28 s delay to prevent false transition. when uvp is triggered, ugate and lgate will get low, and the output is discharged with the internal 20 transistor. uvp is a latched protection; it can only be released by vdd or en/dem power - on reset. the uvp blanking time is 2ms during soft - start. 10. under voltage lockout the AP3591 provides an under voltage lockout circuit to prevent from undefined s tatus at startup. the uvlo circuit shuts down the device when v dd drops below 3.6v. the uvlo circuit has 300mv hysteresis, which means the device will start up again when v dd rises to 3.9 v. 11. over voltage protection (ovp) the feedback voltage is continu ously monitored for over voltage protection. when ovp is triggered, lgate will go high and ugate will go low to discharge the output capacitor. ) ( r a 10 ) ( v set - oc cs ? ? ? k mv m in out out in pp l v v v v f l v i v ? ? ? ? ? ? ? ? ? ? ) ( 2 1 r 2 r i ds(on) cs ) ( ds(on) cs o_ocset oc comparator current sense ioc ops r oc - set q 1 q 2 reverse buffer
ap 3591 document number: ds 36906 rev. 1 - 2 14 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated application information ( cont. ) the AP3591 provides full - time over voltage protection whenever soft - start com pletes or not. the typical ovp threshold is 125% of the internal reference voltage v ref . the AP3591 provides latched ovp and can only be released by vdd or en/dem power - on reset. there is 33 s delay built into the over voltage protection circuit to prevent false transitions. figure 4 . over voltage protection 12. thermal shutdown if the junction temperature of the device reaches the thermal shutdown limit of + 160oc, the AP3591 shuts itself off. both ugate and lgate are driven low, turn ing off both mosfets. the output is discharged with the internal 20 transistor. when the junction temperature cools down to the required level ( + 140c nominal), the device initiates soft - start as during a normal power - up cycle. v out 1v/div v lgate 5v/div time 100 s/div v ugat e 20v/div
ap 3591 document number: ds 36906 rev. 1 - 2 15 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated ordering information diodes ics pb - free products with "g1" suffix in the part number, are rohs compliant and green . package temperature range part number marking id packing u - qfn3 5 3 5 - 1 4 - 40 to + 85 ? c ap35 91fn tr - g1 bha 5000/ tape & reel ma rk ing information (1) u - qfn3 5 3 5 - 1 4 (top view) first l ine: logo and marking id second and third l ine s : date code y: y ear ww: w ork w eek of m olding a: a ssembly h ouse c ode xx: 7 th and 8 th d igits of batch no . p a c k i n g p a c k a g e p r o d u c t n a m e t r : t a p e & r e e l g 1 : g r e e n a p 3 5 9 1 x x x x C r o h s / g r e e n f n : u - q f n 3 5 3 5 - 1 4
ap 3591 document number: ds 36906 rev. 1 - 2 16 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated package outline dimensions (all d imensions in mm (inch) . ) (1) package type: u - qfn3 5 3 5 - 1 4 3 . 4 0 0 ( 0 . 1 3 4 ) 3 . 6 0 0 ( 0 . 1 4 2 ) 3 . 4 0 0 ( 0 . 1 3 4 ) 3 . 6 0 0 ( 0 . 1 4 2 ) 1 . 9 0 0 ( 0 . 0 7 5 ) 2 . 1 0 0 ( 0 . 0 8 3 ) 1 . 5 0 0 ( 0 . 0 5 9 ) b s c 0 . 5 0 0 ( 0 . 0 2 0 ) b s c 0 . 3 5 0 ( 0 . 0 1 4 ) 0 . 4 5 0 ( 0 . 0 1 8 ) 0 . 2 0 0 ( 0 . 0 0 8 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 7 5 0 ( 0 . 0 3 0 ) 0 . 9 0 0 ( 0 . 0 3 5 ) 0 . 0 0 0 ( 0 . 0 0 0 ) 0 . 0 5 0 ( 0 . 0 0 2 ) a 1 p i n 1 m a r k p i n # 1 i d e n t i f i c a t i o n s e e d e t a i l a 1 d e t a i l a p i n 1 o p t i o n s n 1 n 2 n 6 n 8 n 1 3 n 1 4 2 3 4 1 2 3 4 1 2 3 4 s y m b o l a 1 m i n ( m m ) m a x ( m m ) m i n ( i n c h ) m a x ( i n c h ) o p t i o n 1 o p t i o n 2 0 . 2 0 3 ( r e f ) 0 . 1 5 0 ( r e f ) 0 . 0 0 8 ( r e f ) 0 . 0 0 6 ( r e f ) 1 . 9 0 0 ( 0 . 0 7 5 ) 2 . 1 0 0 ( 0 . 0 8 3 )
ap 3591 document number: ds 36906 rev. 1 - 2 17 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated s uggested pad layout (1) package t ype: u - qfn 3 5 3 5 - 1 4 dimensions x=y (mm)/(inch) x1=y1 (mm)/(inch) x2=y2 (mm)/(inch) x3=y3 (mm)/(inch) e1 (mm)/(inch) e2 (mm)/(inch) value 3.800/0.15 0 2.100/0.083 0.650/0.026 0.300/0.012 0.500/0.020 1.500/0.059 e 2 x 2 x 1 y 1 y 2 e 1 y 3 x 3 x y
ap 3591 document number: ds 36906 rev. 1 - 2 18 of 18 www.diodes.com march 2014 ? diodes incorporated AP3591 new product a product line of diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warrant ies of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other ch anges without further notice to this document and any product described herein. diodes incorporated does not assume any liability a rising out of the application or use of this document or any product described herein; neither does diodes incorporated conve y any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthor ized sales channel. shou ld customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall ind emnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arisi ng out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of this docu ment is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or system s without the express written approval o f the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or susta in life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life sup port device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regula tory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety - related requirements concerning their products and any use of diodes incorporated products in such safety - critical, life support devices or systems, notwithstanding any devices - or systems - related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorpora ted and its representatives again st any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 201 4 , diodes incorporated www.diodes.com

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