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ap7346 document number: ds 38082 rev. 1 - 2 1 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product dual high accuracy current limit ldo with enable description the ap7346 is a d ual high accuracy current limit , low dropout regulator with high output voltage accuracy, low r ds ( on ) , high psrr, low output noise and low quiescent current . this regulator is based on a cmos process. each of regulators includes a voltage reference, error amplifier, current limit circuit and an enable input to turn on / off output . with the integrated res istor network , fixed output voltage versions can be delivered. with its low power consumption and line and load transient response , the ap7346 is well suited for low power handheld communication equipment. the ap7346 is packaged in x2 - dfn1 2 1 2 - 6 package and allows for smallest footprint and dense pcb layout. features ? low v in and w ide v in r ange: 1.7v to 5. 2 5v ? high accuracy current limit : 157ma+/ - 25ma ? v out a ccuracy : 1% ? ripple rejection : 75 d b at 1khz ? low o utput n oise : 60 vrms from 10hz to 100khz ? quiescent c urrent as l ow as 3 5 a ? v out f ixed 1. 2v to 3. 6 v ? totally lead - f ree & and fully rohs c ompliant (note s 1 & 2 ) ? halogen and antimony free, green device (note 3 ) pin assignments applications ? f i ngerprint modular ? smart p hone/pad ? rf supply ? cameras ? portable video ? portable media p layer ? wireless adapter ? wireless communication note s: 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 hal ogen - and antimony - free, "green" and lead - f ree . 3. halogen - and antimony - free "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. typical applications circuit ap7346 t o p v i e w 1 2 3 x 2 - d f n 1 2 1 2 - 6 6 5 4 v o u t 1 v o u t 2 g n d e n 1 v i n e n 2
ap7346 document number: ds 38082 rev. 1 - 2 2 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product pin description s pin number p in name function 1 v out1 channel 1 o utput v oltage pin 2 v out2 channel 2 o utput v oltage pin 3 gnd ground 4 en 2 chanel 2 e nable pin. this pin should be driven either high or low and must not be floating. driving this pin high enables channel 2 output , while pulling it low puts chanel 2 regulator into shutdown mode . 5 v in power i nput pin 6 en 1 chanel 1 e nable pin. this pin should be driven either high or low and must not be floating. driving this pin high enables channel 1 output , while pulling it low puts chanel 1 regulator into shutdown mode . C thermal pad i n pcb layout, prefer to use large copper area to cover this pad for better thermal dissipation, then connect this area to gnd or leave it open. h owever do not use it as gnd electrode function alone . functional block diagram with discharge en1 e n2 v in
ap7346 document number: ds 38082 rev. 1 - 2 3 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product absolute maximum ratings (@ t a = +25c, unless otherwise specified. note 4 ) symbol parameter rating unit v in input voltage 6. 0 v v en input voltage at en pins 6. 0 v v out output voltage - 0.3 to v in +0.3 v i out output current 1 30 ma p d power dissipation 600 mw t a operating ambient temperature - 40 to +85 c t stg storage temperature - 55 to +125 c note 4 : stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are str ess ratings only and functional operation of the device at these conditions is not implied. exposure to absolute - maximum - rated conditions for extended periods may affect device reliability. recommended operating conditions (@ t a = +25c, unless otherwise specified.) s ymbol p arameter min max u nit v in input voltage 1. 7 5. 2 5 v i out output current 0 130 ma t a operating ambient temperature - 40 +85 c
ap7346 document number: ds 38082 rev. 1 - 2 4 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product electrical characteristics (@ t a = +25c, v in = v out +1v (v out > 1.5v ) , v in = 2.5v ( v out 1.5v ) , i out = 1ma , c in = c out = 1.0 f , unless otherwise specified.) parameter conditions min typ max unit input voltage t a = - 40c to + 85c 1.7 C in = (v out - n om +1.0v) to 5.25 v , i out = 1 ma to 120 ma t a = + 25c - 1 C a = - 40c to + 85c - 1.5 C ? out / ? in /v out ) v in = (v out - nom +1.0v) to 5.25v , i out = 1.0 ma C ? out / ? out ) v in = v out - nom +1.0v, i out = 1ma to 120 ma C C C standby set en 1/ en 2 low, no load C C C C out short to ground C C in = ( v out +1v ) v dc + 0.2vp - pac, v out 1.8v, i out = 30ma f = 1khz C C out = 30 ma C C out = 120 ma v out C out C out C out C out C out C out C out = 30 ma, t a = - 40c to + 85c C C C C C C en = 0 v , v in = 5.0v or v en = 5.0v, v in = 0v - 1.0 C in = 4.0v , v en = 0v (disabled) d v ersion chan n el s 1 & 2 C C ? notes : 5 . dropout voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its n ominal value. 6 . quiescent current defined here i s the difference in current between the input and the output . 7 . short circuit current is measured with v out pulled to gnd . 8 . this specification is guaranteed by design. 9 . to make sure lowest environment noise minimizes the influence on noise measurement . 1 0 . ap7346 is available for b uilt - in discharge. 1 1 . potential multiple grades based on following output voltage accuracy .
ap7346 document number: ds 38082 rev. 1 - 2 5 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product performance characteristics
ap7346 document number: ds 38082 rev. 1 - 2 6 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product performance characteristics (cont.)
ap7346 document number: ds 38082 rev. 1 - 2 7 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product performance characteristics (cont.) line transient response waveforms i out =30ma, t r =t f =5s, c in =none, c out1 =c out2 =0. 47 f, t a = + 25c v out = 1.8v time t ( s) output voltage input voltage 0 20 40 60 80 100 output voltage v out (v) 1.80 1.78 1.82 4 3 2 input voltage v in (v)
ap7346 document number: ds 38082 rev. 1 - 2 8 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product performance characteristics (cont.) load transient response waveforms (v in =v out +1v, c in =c out1 =c out2 =0. 47 f, t a = + 25c ) v out = 1.8v time t ( s) output voltage output current 0.1ma ? 150ma 0 80 160 240 320 400 output voltage v out (v) 200 100 0 output current i out (ma) 1.9 1.8 1.7 3.4 3.3 3.2 output voltage i out =30ma v out = 1.8v time t ( s) output voltage output current 50ma ? 100ma 0 80 160 240 320 400 output voltage v out (v) 150 100 50 0 output current i out (ma) 1.9 1.8 1.7 3.4 3.3 3.2 output voltage i out =30ma v out =3 .3 v time t ( s) output voltage output current 50ma ? 100ma 0 80 160 240 320 400 output voltage v out (v) 150 100 50 0 output current i out (ma) 3.4 3.3 3.2 1 . 9 1 . 8 1 .7 output voltage iout=30ma time t ( s) output voltage 0 80 160 240 320 400 output voltage v out (v) 200 100 0 output current i out (ma) 3.4 3.3 3.2 1 . 9 1 .8 1 .7 output voltage iout =30ma v out =3.3v output current 0.1ma ? 130ma
ap7346 document number: ds 38082 rev. 1 - 2 9 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product performance characteristics (cont.) turn o n waveform of output discharge v ersions (v in =v out +1v, c in =c out1 =c out2 =0. 47 f, t a = + 25c ) turn off waveform of output discharge versions (v in =v out +1v, c in =c out1 =c out2 =0. 47 f, t a = +25c ) v out = 3.3v time t ( s) output voltage e n input voltage 0 40 80 120 160 200 output voltage v out (v) 0 2 2 4 en input voltage v en (v) i out =0ma i out =30ma i out =130ma 0 4 v out = 1.8v time t ( s) output voltage en input voltage 0 40 80 120 160 200 output voltage v out (v) 0 1 3 2 1 2 en input voltage v en (v) i out =0ma i out =30ma i out =150ma 0 v out = 3.3v time t ( s) output voltage en input voltage 0 40 80 120 160 200 output voltage v out (v) 0 2 2 4 en input voltage v en (v) i out =0ma i out =30ma i out =130ma 0 4 v out = 1.8v time t ( s) output voltage e n input voltage 0 40 80 120 160 200 output voltage v out (v) 0 1 3 2 1 2 en input voltage v en (v) i out =0ma i out =30ma i out =150ma 0
ap7346 document number: ds 38082 rev. 1 - 2 10 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product application information output capacitor an output capacitor (c out ) is needed to improve transient response and maintain stability. the ap7346 is stable with very small ceramic output capacitors. the esr ( e quivalent s eries r e sistance) and capacitance drive the selection. if the application has large load variations, it is recommended to utilize low - esr bulk capacitors. it is recommended to place ceramic capacitors as close as possible to the load and t he gnd pin and care should be taken to reduce the impedance in the layout. input capacitor to prevent the input voltage from dropping during load steps , it is recommended to utilize an input capacitor (c in ). a minimum 0.47f ceramic capacitor is recommended between v in and gnd pin to decouple input power supply glitch. this input capacitor must be located as close as possible to the device to assure input stability and reduce noise. for pcb layout, a wide copper trace is requi red for both v in and gnd pin . enable control the ap7346 is turned on by setting the en pin s high, and is turned off by pulling it low. if this feature is not used, the en pin s should be tied to v in pin to keep the regulator output on at all time. to ensure proper operation, the signal source used to drive the en pin s must be able to swing above and below the specified turn - on/off voltage thresholds listed in the electrical characteristics section. short circuit protection when v out pin s are short - cir cuit to gnd, short circuit protection will be triggered and clamp the output current to approximately 60ma. this feature protects the regulator from over - current and damage due to overheating. layout considerations for good ground loop and stability, the input and output capacitors should be located close to the input, output, and gnd pin of the device. the regulator gnd pin should be connected to the external circuit ground to reduce voltage drop caused by trace impedance. ground plane is gene rally used to reduce trace impedance. wide trace should be used for large current paths from v in to v out , and load circuit. esr vs. output current ceramic type output capacitor is recommended for this series; however, the other output capacitors with low esr also c an be used. the relations between i out (output current) and esr of an output capacitor are shown below. the stable region is marked as the hatched area in the graph. measurement conditions : frequency band: 10hz to 2mhz , temperature : ?40c to + 85c . 0.001 0.01 0.1 1 10 100 0 50 100 150 200 250 300 esr ( ) output current i out (ma) esr vs. output current ap734 6 - 18 - 40 c 85 c 0.001 0.01 0.1 1 10 100 0 50 100 150 200 250 300 esr ( ) output current i out (ma) esr vs. output current ap734 6 - 33 - 40 c 85 c
ap7346 document number: ds 38082 rev. 1 - 2 11 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product ordering information device package code packaging 7 tape and reel quantity part number suffix ap7346 d - xx xx fs6 - 7 fs6 x2 - dfn1 2 12 - 6 5000/tape & reel - 7 marking information (1) x2 - dfn1212 - 6 part number v out1 /v out2 package identification code ap7346 d - 12 18 fs6 - 7 1.2v/1.8v x2 - dfn1 2 12 - 6 eaa ap7346 d - 1 528 fs6 - 7 1.5v/2.8v x2 - dfn1 2 12 - 6 eab ap7346 d - 1 815 fs6 - 7 1.8v/1.5v x2 - dfn1 2 12 - 6 eac ap7346 d - 1 818 fs6 - 7 1.8v/1.8v x2 - dfn1 2 12 - 6 ead ap7346 d - 1 828 fs6 - 7 1.8v/2.8v x2 - dfn1 2 12 - 6 eae ap7346 d - 1 833 fs6 - 7 1.8v/3.3v x2 - dfn1 2 12 - 6 eaf ap7346 d - 2518 fs6 - 7 2.5v/1.8v x2 - dfn1 2 12 - 6 eag a p 7 3 4 6 x - x x x x x x x - x p a c k i n g p a c k a g e o u t p u t d i s c h a r g e 7 : t a p e & r e e l f s 6 : x 2 - d f n 1 2 1 2 - 6 c h 1 / c h 2 o u t p u t v o l t a g e d : o u t p u t d i s c h a r g e c h 1 c h 2 1 2 : 1 . 2 v 1 5 : 1 . 5 v 1 8 : 1 . 8 v 2 5 : 2 . 5 v 2 8 : 2 . 8 v 3 0 : 3 . 0 v 3 3 : 3 . 3 v 3 6 : 3 . 6 v 1 2 : 1 . 2 v 1 5 : 1 . 5 v 1 8 : 1 . 8 v 2 5 : 2 . 5 v 2 8 : 2 . 8 v 3 0 : 3 . 0 v 3 3 : 3 . 3 v y : y e a r : 0 ~ 9 ( t o p v i e w ) x : i n t e r n a l c o d e y w x x x x x x x : i d e n t i f i c a t i o n c o d e w : w e e k : a ~ z : 1 ~ 2 6 w e e k ; a ~ z : 2 7 ~ 5 2 w e e k ; z r e p r e s e n t s 5 2 a n d 5 3 w e e k
ap7346 document number: ds 38082 rev. 1 - 2 12 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product marking information (cont.) ap7346 d - 2812 fs6 - 7 2.8v/1.2v x2 - dfn1212 - 6 eah ap7346 d - 2818 fs6 - 7 2.8v/1.8v x2 - dfn1212 - 6 eaj ap7346 d - 2825 fs6 - 7 2.8v/2.5v x2 - dfn1212 - 6 eak ap7346 d - 2833 fs6 - 7 2.8v/3.3v x2 - dfn1212 - 6 eam ap7346 d - 3018 fs6 - 7 3.0v/1.8v x2 - dfn1212 - 6 ean ap7346 d - 3028 fs6 - 7 3.0v/2.8v x2 - dfn1212 - 6 eap ap7346 d - 3030 fs6 - 7 3.0v/3.0v x2 - dfn1212 - 6 ear ap7346 d - 3318 fs6 - 7 3.3v/1.8v x2 - dfn1212 - 6 eas ap7346 d - 3328 fs6 - 7 3.3v/2.8v x2 - dfn1212 - 6 eat ap7346 d - 3330 fs6 - 7 3.3v/3.0v x2 - dfn1212 - 6 eau ap7346 d - 3333 fs6 - 7 3.3v/3.3v x2 - dfn1212 - 6 eav ap7346 d - 3612 fs6 - 7 3.6v/1.2v x2 - dfn1212 - 6 eaw package outline dimensions (all d imensions in mm . ) please see ap02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. (1) package type: x2 - dfn1212 - 6 x2 - dfn1212 - 6 dim min max typ a - ? 0.40 0.39 ? 0 .00 0.0 5 0.0 20 a 3 - - 0.13 b 0. 13 0. 23 0. 18 d 1.15 1.25 1.20 d2 0.89 0.99 0.94 e 1.15 1.25 1.20 e2 0.25 0.35 0.30 e - - 0.40 k 0.15 0.25 0.20 l 0.15 0.25 0.20 z - - 0.11 z1 - - 0.05 all dimensions in mm a a3 seating plane a1 d e l b d2 e2 e k pin 1 id c0.15 z z1
ap7346 document number: ds 38082 rev. 1 - 2 13 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product suggested pad layout please see ap02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. (1) package type: x2 - dfn1212 - 6 tape orientation note : the taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf . dimensions value (in mm) c 0.400 g 0.150 x 0.250 x1 0.940 x2 1.050 y 0.400 y1 0.300 y2 1.400 x x y w x x x y w x x x y w x p i n 1 y2 x2 c y1 x1 x y g
ap7346 document number: ds 38082 rev. 1 - 2 14 of 14 www.diodes.com july 2015 ? diodes incorporated ap7346 new product 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 warranties 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 changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license unde r its patent or trademark rights, nor the rights of others. any customer or user of t his document or products described herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diod es 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. should customers purchase or use diodes incorporated products for any unintended or unauthorized application , customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t 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 nam es and markings noted herein may also be covered by one or more united states, international or fore ign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of this document is the final and determinative format released by diodes incorporated. life support diodes incorp orated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or syst ems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expe cted 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 regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safe ty - 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 in corporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 201 5 , diodes incorporated www.diodes.com

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