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a z431l document number: ds 36801 rev. 3 - 2 1 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated low voltage (1.24v) adjustable precision shunt regulator description the az431l series ics are low voltage three - terminal adjustable regulators with guaranteed thermal stability over a full opera tion range. these ics feature sharp turn - on characteristics, low temperature coefficient and low output impedance, which make them ideal substitutes for zener diodes in applications such as switching power supply, charger, motherboard and other adjustable regulators. the output voltage can be set to any value between 1.24v and 18v with two external resistors. the az431l precision reference is offered in two voltage tolerance: 0.5% and 1.0%. these ics are available in 4 packages: to - 92 (bulk or ammo packing), sot - 23, sot - 23 - 5 and sot - 89. features ? wide programmable precise output voltage from 1.24v to 18v ? high stability under capacitive load ? low temperature deviation: 3mv typical ? low equivalent full - range temperature coefficient: 20ppm/ o c typical ? low dynamic output resistance: 0.05 ? typical ? high sink current capacity from 0.1ma to 100ma ? low output noise ? wide operating range of - 40 to + 125 o c applications ? graphic card ? pc motherboard ? voltage adapter ? switching power supply ? charger pin assignments (top view) (top view) (top view) (to - 92 (bulk packing)/ z package) (to - 92 (ammo packing)/ z package) (sot - 23/ n package) 1 2 3 cathode anode ref cathode anode ref 1 2 3 cathode anode ref 3 2 1
a z431l document number: ds 36801 rev. 3 - 2 2 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated pin assignments (cont.) (top view) (top view) (top view) (sot - 23 - 5/ k package) (sot - 89 option 1/ r package) (sot - 89 option 2/ r package) note 1: *pin 2 is attached to substrate and must be connected to anode or open . typical applications circuit shunt regulator high current shunt regulator 1 2 3 ref anode cathode 1 2 3 ref anode cathode cathode anode ref 1 2 3 4 5 nc * ( note 1 )
a z431l document number: ds 36801 rev. 3 - 2 3 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated typical applications circuit (cont.) current source or current limit precision 5v 1a regulator pwm converter with reference
a z431l document number: ds 36801 rev. 3 - 2 4 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated functional block diagram absolute maximum ratings ( note 2 ) symbol parameter rating unit v ka cathode voltage 20 v i ka cathode current range (continuous) - 100 to 100 ma i ref reference input current range 10 ma p d power dissipation z, r package 770 m w n, k package 370 t j junction temperature + 150 oc t stg storage temperature range - 65 to + 150 oc note 2 : stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are stres s ratings on ly, and functional operation of the device at these or any other conditions beyond those indicated under recommended o perating conditions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. recommended operating conditions symbol parameter min max unit v ka cathode voltage v ref 18 v i ka cathode current 0.1 100 ma C operating ambient temperature range - 40 + 125 oc
a z431l document number: ds 36801 rev. 3 - 2 5 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated electrical characteristics ( operating conditions: t a = + 25 oc, unless otherwise noted. ) symbol parameter test circuit conditions min typ max unit v ref reference voltage 0.5% 4 v ka = v ref , i ka = 10ma 1.234 1.240 1.246 v 1.0% 1.228 1.240 1.252 ? v ref deviation of reference voltage over full temperature range 4 v ka = v ref , i ka = 10ma 0 to +70c C 2 10 mv - 40 to +85c C 3 10 - 40 to +125c C 4 15 ? v ref ? v ka ratio of change in v ref to the change in cathode voltage 5 i ka = 10ma, ? v ka : v ref to 16v C - 0.5 - 1.5 mv/v i ref reference input current 5 i ka = 10ma, r1 = 10k?, r2 = C 0.1 5 0.4 a ? i ref deviation of reference current over full temperature range 5 i ka = 10ma, r1 = 10k?, r2 = , t a = - 40 to +125c C 0.1 0.4 a i ka (min) minimum cathode current for regulation 4 v ka = v ref C 55 80 a i ka (off) off - state cathode current 6 v ref = 0, v ka = 18v C 0.04 0.10 a v ka = 6 , v ref = 0 C 0.01 0.05 z ka dynamic impedance 4 v ka = v ref , i ka = 1 to 100ma, f 1.0khz C 0.05 0.15 ? jc thermal resistance C sot - 23 C 84.84 C c/w sot - 23 - 5 C 84.84 C to - 92 C 140.80 C sot - 89 C 29.80 C
a z431l document number: ds 36801 rev. 3 - 2 6 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated electrical characteristics ( cont. ) test circuit 4 for v ka = v ref test circuit 5 for v ka > v ref test circuit 6 for i off
a z431l document number: ds 36801 rev. 3 - 2 7 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated performance characteristics reference voltage vs. ambient temperature reference current vs. ambient temperature cathode current vs. cathode voltage cathode current vs. cathode voltage small signal voltage gain vs. frequency -1 0 1 -150 -100 -50 0 50 100 150 cathode current (ma) cathode voltage (v) v ka =v ref t a =25 o c -50 -25 0 25 50 75 100 125 150 1.235 1.236 1.237 1.238 1.239 1.240 1.241 1.242 reference voltage (v) ambient temperature ( o c) v ka =v ref i ka =10ma 1k 10k 100k -10 0 10 20 30 40 50 60 70 voltage gain (db) small signal frequency (hz) t a =25 0 c i ka =10ma -1 0 1 -300 -200 -100 0 100 200 300 400 cathode current ( ? a) cathode voltage (v) v ka =v ref t a =25 o c -50 -25 0 25 50 75 100 125 0.12 0.13 0.14 0.15 0.16 0.17 0.18 r1=10k ? r2=infinite i ka =10ma ambient temperature ( o c) reference current ( ? a)
a z431l document number: ds 36801 rev. 3 - 2 8 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated performance characteristics (cont.) dynamic impedance vs. frequency pulse response of input and output voltage ratio of delta reference voltage to the ratio of cathode voltage vs. ambient temperature -40 -20 0 20 40 60 80 100 120 -0.55 -0.50 -0.45 -0.40 -0.35 -0.30 i ka =10ma ? v ka =v ref to 16v ratio of ? v ref to ? v ka (mv/v) ambient temperature ( o c) 1k 10k 100k 1m 0.01 0.1 1 10 i ka =1ma to 100ma dynamic impedance ( ? ) frequency (hz) -1 0 1 2 3 4 5 6 0 1 2 3 input input and output voltage (v) time ( ? s) output
a z431l document number: ds 36801 rev. 3 - 2 9 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated ordering information diodes ic 's pb - free products, as designated with " e 1" suffix in the part number, are rohs compliant . products with " g1 " suffix are available in green packages . package temperature range voltage tolerance part number marking id packing type lead free green lead free green to - 92 - 40 to +125 c 0.5% az431laz - e 1 az431laz - g 1 az431laz - e 1 az431laz - g 1 bulk 0.5% az431laztr - e 1 az431laztr - g 1 az431laz - e 1 az431laz - g 1 ammo 1.0% az431lbz - e 1 az431lbz - g 1 az431lbz - e 1 az431lbz - g 1 bulk 1.0% az431lbztr - e 1 az431lbztr - g 1 az431lbz - e 1 az431lbz - g 1 ammo sot - 23 - 40 to +125 c 0.5% az431lantr - e 1 az431lantr - g 1 e a6 g a6 tape & reel 1.0% az431lbntr - e 1 az431lbntr - g 1 e a7 g a7 tape & reel sot - 23 - 5 - 40 to +125 c 0.5% az431laktr - e 1 az431laktr - g 1 e 5a g 5a tape & reel 1.0% az431lbktr - e 1 az431lbktr - g 1 e6a g6a tape & reel sot - 89 - 40 to +125 c 0.5% az431lartr - e 1 az431lartr - g 1 e 41a g 41a tape & reel 1.0% az431lbrtr - e 1 az431lbrtr - g 1 e 41b g 41b tape & reel a z 4 3 1 l x x x x - x x p a c k i n g p a c k a g e t r : t a p e & r e e l a : 0 . 5 % b : 1 . 0 % e 1 : l e a d f r e e p r o d u c t n a m e e 1 / g 1 b l a n k : b u l k g 1 : g r e e n v o l t a g e t o l e r a n c e z : t o - 9 2 n : s o t - 2 3 k : s o t - 2 3 - 5 r : s o t - 8 9 o r a m m o
a z431l document number: ds 36801 rev. 3 - 2 10 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated package outline dimensions (all dimensions in mm (inch) .) (1) package type: to - 92 (bulk packing) 2 . 4 2 0 ( 0 . 0 9 5 ) 2 . 6 6 0 ( 0 . 1 0 5 ) 0 . 3 6 0 ( 0 . 0 1 4 ) 0 . 7 6 0 ( 0 . 0 3 0 ) 1 . 6 0 0 ( 0 . 0 6 3 ) m a x 1 2 . 5 0 0 ( 0 . 4 9 2 ) 1 5 . 5 0 0 ( 0 . 6 1 0 ) 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 3 . 3 0 0 ( 0 . 1 3 0 ) 3 . 7 0 0 ( 0 . 1 4 6 ) 4 . 3 0 0 ( 0 . 1 6 9 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 1 . 0 0 0 ( 0 . 0 3 9 ) 1 . 4 0 0 ( 0 . 0 5 5 ) 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 )
a z431l document number: ds 36801 rev. 3 - 2 11 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated package outline dimensions ( cont. all d imensions in mm ( inch ) . ) (2) package type: 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 )
a z431l document number: ds 36801 rev. 3 - 2 12 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated package outline dimensions ( cont. all dimensions in mm (inch) .) (3) package type: sot - 23 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
a z431l document number: ds 36801 rev. 3 - 2 13 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated package outline dimensions ( cont. all dimensions in mm (inch) .) (4) package type: sot - 23 - 5 2 . 8 2 0 ( 0 . 1 1 1 ) 2 . 6 5 0 ( 0 . 1 0 4 ) 1 . 5 0 0 ( 0 . 0 5 9 ) 0 . 0 0 0 ( 0 . 0 0 0 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 9 5 0 ( 0 . 0 3 7 ) 0 . 9 0 0 ( 0 . 0 3 5 ) 0 . 1 0 0 ( 0 . 0 0 4 ) 0 . 2 0 0 ( 0 . 0 0 8 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 8 0 3 . 1 0 0 ( 0 . 1 2 2 ) 1 . 7 0 0 ( 0 . 0 6 7 ) 3 . 0 0 0 ( 0 . 1 1 8 ) 0 . 5 0 0 ( 0 . 0 2 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 3 0 0 ( 0 . 0 5 1 ) 0 . 2 0 0 ( 0 . 0 0 8 ) 0 . 6 0 0 ( 0 . 0 2 4 ) 1 . 8 0 0 ( 0 . 0 7 1 ) 2 . 0 0 0 ( 0 . 0 7 9 ) 0 . 7 0 0 ( 0 . 0 2 8 ) r e f t y p 1 . 4 5 0 ( 0 . 0 5 7 ) m a x
a z431l document number: ds 36801 rev. 3 - 2 14 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated package outline dimensions ( cont. all dimensions in mm (inch) .) (5) package type: sot - 89 4 5 1 . 5 5 0 ( 0 . 0 6 1 ) r e f 4 . 4 0 0 ( 0 . 1 7 3 ) 4 . 6 0 0 ( 0 . 1 8 1 ) 0 . 9 0 0 ( 0 . 0 3 5 ) 1 . 2 0 0 ( 0 . 0 4 7 ) 3 . 9 5 0 ( 0 . 1 5 6 ) 4 . 2 5 0 ( 0 . 1 6 7 ) 3 . 0 0 0 ( 0 . 1 1 8 ) t y p 0 . 4 8 0 ( 0 . 0 1 9 ) 2 . 3 0 0 ( 0 . 0 9 1 ) 2 . 6 0 0 ( 0 . 1 0 2 ) 0 . 3 2 0 ( 0 . 0 1 3 ) 0 . 5 4 0 ( 0 . 0 2 1 ) 3 1 0 2 . 0 6 0 ( 0 . 0 8 1 ) r e f 1 . 4 0 0 ( 0 . 0 5 5 ) 1 . 6 0 0 ( 0 . 0 6 3 ) 0 . 3 5 0 ( 0 . 0 1 4 ) 0 . 4 5 0 ( 0 . 0 1 8 ) r 0 . 1 5 0 ( 0 . 0 0 6 ) 3 1 0 1 . 5 0 0 ( 0 . 0 5 9 ) 0 . 3 2 0 ( 0 . 0 1 3 ) r e f 1 . 6 2 0 ( 0 . 0 6 4 ) r e f 2 . 2 1 0 ( 0 . 0 8 7 ) r e f 0 . 3 2 0 ( 0 . 0 1 3 ) 0 . 5 4 0 ( 0 . 0 2 1 ) 1 . 8 0 0 ( 0 . 0 7 1 ) o p t i o n 1 o p t i o n 2 0 . 6 2 0 ( 0 . 0 2 4 ) 1 . 0 3 0 ( 0 . 0 4 1 ) r e f r 0 . 2 0 0 ( 0 . 0 0 8 ) 1 . 6 2 0 ( 0 . 0 6 4 ) 1 . 8 3 0 ( 0 . 0 7 2 ) 2 . 6 3 0 ( 0 . 1 0 4 ) 2 . 9 3 0 ( 0 . 1 1 5 ) o p t i o n 1
a z431l document number: ds 36801 rev. 3 - 2 15 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated suggested pad layout (1) package type: sot - 23 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
a z431l document number: ds 36801 rev. 3 - 2 16 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated suggested pad layout (cont.) (2) package type: sot - 23 - 5 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e1 (mm)/(inch) e2 (mm)/(inch) value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037 1.900/0.075 e 2 e 1 y x g z
a z431l document number: ds 36801 rev. 3 - 2 17 of 18 www.diodes.com january 2014 ? diodes incorporated az431l a product line of diodes incorporated suggested pad layout (cont.) (3) package type: sot - 89 dimensions z (mm)/(inch) x (mm)/(inch) x1 (mm)/(inch) x2 (mm)/(inch) y (mm)/(inch) y1 (mm)/(inch) e (mm)/(inch) value 4.600/0.181 0.550/0.022 1.850/0.073 0.800/0.031 1.300/0.051 1.475/0.058 1.500/0.059 x 1 x 2 y 1 e x y z
a z431l document number: ds 36801 rev. 3 - 2 18 of 18 www.diodes.com january 2014 ? diodes incorporated az431l 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 warranties of merchantability and fitness for a particular purpose (and their equivalen ts 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 lia bility 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 this document or pro ducts 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 incorpora ted does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales chann el. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall i ndemnify 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 ap plication. 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 foreign trademarks. th is document is written in english but may be translated into multiple languages for reference. only the english version of t his document 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 systems without the express written approval of 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 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 effectiven ess. 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 re quirements 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 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 ? 2012, diodes incorporated www.diodes.com

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