programmable precision shunt regulator tj 431/a/c july 201 4 C r1. 1 - 1 - htc features ? programmable output voltage to 28 v ? guaranteed 0.5% reference voltage tolerance ? cathode current range(continuous) 1 0 0 ma ? temperature compensated for operation over full rate operating temperature range ? low output noise voltage ? fast turn - on respo nse ? to - 92, sot - 89 or sot - 23 3l package application ? shunt regulator ? precision high - current series regulator ? high - current shunt regulator ? crowbar circuit ? pwm converter with reference ? voltage monitor ? precision current limiter descripsion the tj 431 is a th ree - terminal adjustable shunt regulato r with specified t h ermal stability over applicable temperature v ref (approx. 2.5v) and 28 v with two external resistors. this device has a typical dynamic output impedance of 0.2 5 ? . active output circuitry provides a ve ry sharp turn - on characteristic, making this device excellent replacement for zener diodes in many applications. the tj 431 is characterized for operation from - 4 0 to +125 . to - 92 pkg 3 2 1 sot - 23 pkg 2 1 3 sot - 89 pkg 1 2 3 pin 1. reference 2. anode 3. cathode ordering information device package tj 431 to - 92(bulk) tj 431ta to - 92(taping) tj 431sf sot - 23 3l tj 431f sot - 89 3l * refer to the page 2 for detail ed orderin g information, absolute maximum ratings ( operating t emperature r ange a pplies u nless o therwise specified ) characteristic symbol min. max. unit cathode voltage v ka - 37 v cathode current range(continuous) i k - 100 150 ma reference input current range i r ef - 0.05 10 ma junction temperature range t j - 40 150 operating temperature range t opr - 4 0 125 storage temperature range t stg - 65 150 t o p top top
programmable precision shunt regulator tj 431/a/c july 201 4 C r1. 1 - 2 - htc recommended operating conditions characteristic symbol min. max. unit cathode voltage v ka v ref 28 v cathode c urrent i k 1.0 100 ma ordering information v ref package tolerance order no. package marking supplied as 2.495v to - 92 0.5% tj 431c - bulk tj 431gc - tj 431c ta - tape tj 431gcta - 1% tj 431a - bulk tj 431ga - tj 431a ta - tape tj 431g ata - 2% tj 431 - bulk tj 431g - tj 431 ta - tape tj 431gta - sot - 23 0.5% tj 431csf - reel tj 431gcsf - 1% tj 431asf - reel tj 431gasf - 2% tj 431sf - reel tj 431gsf - sot - 89 0.5% tj 431cf - reel 1% tj 431af - reel 2% tj 431f - reel
programmable precision shunt regulator tj 431/a/c july 201 4 C r1. 1 - 3 - htc ordering information (c ontinued) g r e e n m o d e r o o t n a m e p r o d u c t c o d e t j 4 3 1 g : h a l o g e n f r e e h : h a l o g e n f r e e b l a n k : p b f r e e t o l e r a n c e c : 0 . 5 % a : 1 % b l a n k : 2 % p a c k a g e t y p e : t o - 9 2 : s o t - 2 3 : s o t - 8 9 t a s f f
programmable precision shunt regulator tj 431/a/c july 201 4 C r1. 1 - 4 - htc pin configuration to - 92 pkg sot - 23 pkg sot - 89 pkg pin description pin no. t o - 92 / sot - 23 / sot - 89 name function 1 reference reference voltage 2 anode ground 3 cathode input supply voltage tj 431 electrical characteristics (t a =25 , unless otherwise specified) characteristic symbol test condition min. typ. max. unit reference input voltage v ref v ka =v ref , i k =10ma tj 431c 2.483 2.495 2.507 v tj 431a 2.47 0 2.495 2.52 0 tj 431 2.44 0 2.495 2.55 0 deviation of reference input v oltage v ref /t v ka = v ref , i k =10ma t a =full range 2 4 mv ratio of change in reference input voltage to the change in cathode voltage v ref /v ka i k =10ma v ka =10v to v ref - 2.7 - 1. 0 mv/v v ka = 28 v to 10v - 2 - 0.4 reference input current i ref i ka = 10ma, r 1 =10 ? , r 2 = 0.5 1.2 ua deviation of reference input current i ref /t i k =10ma, r 1 =10 ? , r 2 = t a =full range 0.4 1.2 ua minimum cathode current for regulation i k (min) v ka = v ref 0.4 1.0 ma off - state cathode current i k (off) v ka = 28 v, v ref =0 0.1 1.0 ua dynamic impedance z ka v ka = v ref , i k =1ma~100ma f 1 k hz 0. 25 0.5 0 top top 1 2 3 1 3 1 2 2 3 marking side
programmable precision shunt regulator tj 431/a/c july 201 4 C r1. 1 - 5 - htc test circuits < fig 1. test circuit for v ka = v ref > < fig 2. test circuit for v ka v ref > < fig 3. test circuit for i ka (off) >
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