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as431h document number: ds 39284 rev. 1 - 2 1 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product adjustable precision shunt regulators description the as431h is a three - terminal adjustable shunt regulator with guaranteed thermal stability over a full operation range. it features sharp turn - on characteristics, low temperature coefficien t and low output impedance, which make it ideal substitute for zener diode in applications such as switching power supply, charger and other adjustable regulators. the output voltage of as431h can be set to any value between v ref (2. 49 5v) and the corresp onding maximum cathode voltage (36v). the as431h precision reference is offered in two voltage tolerance: 0.5% and 1.0%. this ic is available in 2 packages: to 92 (ammo packing) and sot 23 . features ? programmable precise output voltage from 2. 49 5v to 36v ? high stability under capacitive load ? low temperature deviation: 5mv typical ? low equivalent full - range temperature coefficient with 20ppm/ c typical ? sink current capacity from 0.5 ma to 100ma ? low output noise ? wide operating range of - 40 to + 125 c ? lead - free p ackages, available in green molding compound: sot 23 , to92 (ammo packing) ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3) applications ? charger ? voltage adapter ? switching power supply ? graphic card ? p recision voltage reference pin assignments (top view) sot23 (normal pin - out) (top view) sot23 (mirror pin - out) (top view) to92 (ammo packing) 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 produc ts are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. a n o d e c a t h o d e r e f 3 2 1 3 2 1 anode cathode ref r e f c a t h o d e a n o d e 1 2 3
as431h document number: ds 39284 rev. 1 - 2 2 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product typical applications circuit shunt regulator h igh current shunt regulator
as431h document number: ds 39284 rev. 1 - 2 3 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product typ ical applications circuit (cont.) current source or current limit precision 5v 1a regulator pwm converter with reference
as431h document number: ds 39284 rev. 1 - 2 4 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product functional block diagram absolute maximum ratings ( note 4 ) symbol parameter rating unit v ka cathode voltage 40 v i ka cathode current range (continuous) - 100 to 150 ma i ref reference input current range 10 ma j a thermal resistance sot23 380 c/w to92 (ammo packing) 165 t j junction temperature + 150 c t stg storage temperature range - 65 to +150 c esd esd (human body model) 20 00 v note 4 : stresses greater than those listed under absolute maximum ratin gs 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 operating condi tions is not implied. exposure to absolute maxim um ratings for extended periods may affect device reliability. recommended operating conditions symbol parameter min max unit v ka cathode voltage v ref 36 v i ka cathode current 0.5 100 ma t a operating ambient temperature range - 40 +125 c
as431h document number: ds 39284 rev. 1 - 2 5 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product e lectrical characteristics ( operating conditions: t a = + 25c , unless otherwise specified .) symbol parameter test circuit conditions min typ max unit v ref reference voltage 0.5% 4 v ka = v ref , i ka = 10ma 2.48 3 2.495 2.5 07 v 1.0% 2.47 0 2. 495 2.52 0 ? v r ef deviation of reference voltage over full temperature range 4 v ka = v ref , i ka = 10ma 0 to +70 c 5 8 mv - 40 to +85 c 5 1 4 - 40 to +125 c 5 16 ? v ref ? v ka ratio of change in reference voltage to the change in cathode voltage 5 i ka = 10ma ? v ka = 10v to v ref - 1.0 - 2.7 mv/v ? v ka = 36v to 10v - 0.5 - 2.0 i ref reference current 5 i ka = 10ma, r1 = 10 k ?, r2 = 0.7 4 a ? i ref deviation of reference current over full temperature range 5 i ka = 10ma, r1 = 10 k ?, r2 = , t a = - 40 to +125 c 0.4 1.2 a i ka (min) minimum cathode current for regulation 4 v ka = v ref 0. 35 0.5 ma i ka (off) off - state cathode current 6 v ka = 36v, v ref = 0 0.0 02 0.5 a z ka dynamic impedance 4 v ka = v ref , i ka = 0.5 to 100ma, f 1.0khz 0.15 0.5 ? jc t hermal resistance sot 23 1 36 c/w to 92 (ammo packing) 8 0
as431h document number: ds 39284 rev. 1 - 2 6 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product electrical characteristics ( cont. ) test circuit 4 for v ka = v ref test circuit 5 for v ka > v ref tes t circuit 6 for i off
as431h document number: ds 39284 rev. 1 - 2 7 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product performance characteristics reference voltage vs. ambient temperature reference current vs. ambient temperature cathode current v s. cathode voltage cathode current v s. cathode voltage off - state cathode current ratio of delta reference voltage to the v s. ambient temperature ratio of delta cathode voltage -60 -40 -20 0 20 40 60 80 100 120 140 2.480 2.485 2.490 2.495 2.500 2.505 2.510 reference voltage (v) ambient temperature ( o c) v ka = v ref i ka = 10ma -60 -40 -20 0 20 40 60 80 100 120 140 0.00 0.25 0.50 0.75 1.00 1.25 1.50 r 1 =10k,r 2 =infinite i ka =10ma reference current ( ? a) ambient temperature ( 0 c) -2 -1 0 1 2 3 -100 -50 0 50 100 150 cathode current (ma) cathode voltage (v) v ka =v ref t a =25 0 c -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 -200 0 200 400 600 800 cathode current ( ? a) cathode voltage (v) v ka =v ref t a =25 0 c -40 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 off-state cathode current ( ? a) ambient temperature ( o c) v ka =36v v ref =0 -40 -20 0 20 40 60 80 100 120 -1.4 -1.3 -1.2 -1.1 -1.0 -0.9 v ka =3.5v to 36v ? v ref / ? v ka (mv/v) ambient temperature ( o c)
as431h document number: ds 39284 rev. 1 - 2 8 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product performance characteristics (cont.) small signal voltage gain vs. frequency reference impedance vs. frequency stability boundary conditions vs. load capacitance 1k 10k 100k 1m -10 0 10 20 30 40 50 60 70 voltage gain (db) small signal frequency (hz) t a =25 0 c i ka =10ma 1k 10k 100k 1,000k 0.1 1 10 reference impedance ( ? ) frequency (hz) i ka =10ma t a =25 o c 0 10 20 30 40 50 60 70 80 90 100 10 1 0.1 0.01 0.001 stable stable cathode current (ma) load capacitance ( ? f) t a =25 o c v ka =v ref v ka = 5v:no oscillation v ka =10v:no oscillation v ka =15v:no oscillation
as431h document number: ds 39284 rev. 1 - 2 9 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product performance characteristics (cont.) pulse response of input and output voltage 0 2 4 6 0 1 2 3 4 5 input input and output voltage (v) time ( ? s) output
as431h document number: ds 39284 rev. 1 - 2 10 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product ordering information package temperature range pin - out voltage tolerance part number marking id packing sot 23 - 40 to +125 c normal pin - out 0.5% as431h antr - g1 g ja 3000/ tape & reel 1.0% as431h bntr - g1 g jb 3000/ tape & reel sot 23 - 40 to +125 c mirror pin - out 0.5% as431h m a n tr - g1 g m 5 3000/ tape & reel 1.0% as431h m b n tr - g1 g m 6 3000/ tape & reel to 92 (ammo packing) - 40 to +125 c normal pin - out 0.5% as431h aztr - g1 431h az - g1 2000/ ammo 1.0% as431h bztr - g1 431h bz - g1 2000/ ammo a s 4 3 1 h x x x x - x p a c k i n g v o l t a g e t o l e r a n c e a : 0 . 5 % p i n - o u t p a c k a g e z : t o 9 2 ( a m m o p a c k i n g ) n : s o t 2 3 r o h s / g r e e n t r : t a p e & r e e l o r a m m o g 1 : g r e e n b : 1 . 0 % p r o d u c t n a m e b l a n k : n o r m a l p i n - o u t m : m i r r o r p i n - o u t
as431h document number: ds 39284 rev. 1 - 2 11 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product marking information (1) to92 (ammo packing) (top view) (2) sot23 (top view) firs t and s econd l ine: logo and marking id (see ordering information) third l ine: date cod e y: y ear ww: w ork w eek of m olding a: a ssembly h ouse c ode xx: internal code. xxx x xx - xx ywwaxx 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 t o z : 1 t o 2 6 w e e k ; x : i n t e r n a l c o d e y : y e a r 0 t o 9 a t o z : 2 7 t o 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 1 2 3 x x x y w x
as431h document number: ds 39284 rev. 1 - 2 12 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product package outline dimensions (all d imensions in mm . ) (1) to 92 (ammo packing) 4 . 3 0 0 ( 0 . 1 6 9 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 1 2 . 5 0 0 ( 0 . 4 9 2 ) 1 4 . 5 0 0 ( 0 . 5 7 1 ) 2 . 5 4 0 ( 0 . 1 0 0 ) t y p 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 0 . ( 0 . 0 1 5 ) 0 . 5 5 0 ( 0 . 0 2 2 ) 4 . 4 0 0 ( 0 . 1 7 3 ) 4 . 8 0 0 ( 0 . 1 8 9 ) 3 . 4 3 0 ( 0 . 1 3 5 ) m i n 0 . 3 2 0 ( 0 . 0 1 3 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 0 . 0 0 0 ( 0 . 0 0 0 ) 0 . 3 8 0 ( 0 . 0 1 5 ) m a x 1 . 1 0 0 ( 0 . 0 4 3 1 . 4 0 0 ( 0 . 0 5 5 ) 3 . 3 0 0 ( 0 . 1 3 0 ) 3 . 8 0 0 ( 0 . 1 5 0 ) 1 . 6 0 0 ( 0 . 0 6 3 ) ) 3 8 0 2 . 5 0 0 ( 0 . 0 9 8 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 1 3 . 0 0 0 ( 0 . 5 1 2 ) 1 5 . 0 0 0 ( 0 . 5 9 1 )
as431h document number: ds 39284 rev. 1 - 2 13 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product package outline dimensions ( cont. all d imensions in mm . ) (2) sot23 2 . 3 0 0 ( 0 . 0 9 1 ) 2 . 5 0 0 ( 0 . 0 9 8 ) 1 . 2 0 0 ( 0 . 0 4 7 ) 1 . 4 0 0 ( 0 . 0 5 5 ) 0 . 8 9 0 ( 0 . 0 3 5 ) 1 . 0 3 0 ( 0 . 0 4 1 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 1 . 9 0 0 ( 0 . 0 7 5 ) r e f 2 . 8 0 0 ( 0 . 1 1 0 ) 3 . 0 0 0 ( 0 . 1 1 8 ) 2 . 0 3 . 0 0 . 5 0 0 ( 0 . 0 2 0 ) 0 . 7 0 0 ( 0 . 0 2 8 ) 1 . 0 5 0 ( 0 . 0 4 1 ) r e f 0 . 0 1 0 ( 0 . 0 0 0 4 ) 0 . 1 0 0 ( 0 . 0 0 4 ) 0 . 9 0 0 ( 0 . 0 3 5 ) 1 . 1 0 0 ( 0 . 0 4 3 ) 4 r 0 . 1 0 0 ( 0 . 0 0 4 ) 7 . 0 7 . 0 0 . 5 5 0 ( 0 . 0 2 2 ) r e f 0 . 2 0 0 ( 0 . 0 0 8 ) m i n 0 . 1 0 0 ( 0 . 0 0 4 ) g a u g e p l a n e 0 . 0 8 0 ( 0 . 0 0 3 ) 0 . 1 8 0 ( 0 . 0 0 7 ) r 0 . 1 0 0 ( 0 . 0 0 4 ) 0 . 0 ~ 1 0 . 0
as431h document number: ds 39284 rev. 1 - 2 14 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew product suggested pad layout (1) sot23 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e (mm)/(inch) value 2.900/0.114 1.100/0.043 0.800/0.031 0.900/0.035 0.950/0.037 y g z y x e g r i d p l a c e m e n t c o u r t y a r d
as431h document number: ds 39284 rev. 1 - 2 15 of 15 www.diodes.com january 2017 ? diodes incorporated as431h n ew 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 u nder 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. diod es 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 c ustomer or user of this 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 a gainst 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 unau thorized 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, i nternational or foreign 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 su pport diodes incorporated products are specifically not authorized for use as critical components in life support devices or system s without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life sup port devices or systems 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 r easonably 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 safety - related requirements concerning their products and any use of diodes incorporated products in such safety - crit ical, 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 against any dama ges arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 201 7 , diodes incorporated www.diodes.com

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