cystech electronics corp. spec. no. : c502m3 issued date : 2003.04.02 revised date : 200712.24 page no. : 1/6 TL431M3 cystek product specification adjustable precision shunt regulators so t -89 TL431M3 description the TL431M3 series are three-terminal adjustable regulators with guaranteed thermal stability over applicable temperature range. the output voltage may be set to any value between v ref (approximately 2.495 volts) and 36 volts with two external resist ors. these devices have a typical dynamic output impedance of 0.15 . active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications. features ? programmable output voltage ? temperature coefficient is 50ppm/ c typical ? temperature compensated for operation over full temperature range ? low output noise voltage ? fast turn on response classification rank a b c v ref 2.495 0.5% 2.495 1% 2.495 2% absolute maximum ratings (operating temperature range app lies unless otherwise specified) characteristics symbol value unit cathode voltage v ka 36 v cathode current range (continuous) i k -100~+150 ma reference input current range i ref -0.05~+10 ma power dissipation p d 1 w operating temperature range t opr -40~+85 c storage temperature range t stg -65~+150 c
cystech electronics corp. spec. no. : c502m3 issued date : 2003.04.02 revised date : 200712.24 page no. : 2/6 TL431M3 cystek product specification functional block diagram & symbol test circuits electrical characteristics ( ta=25 c unless otherwise specified ) functional block diagram : symbol : characteristics symbol test conditions min typ max unit tl431a 2.483 2.495 2.507 tl431b 2.470 2.495 2.520 reference input voltage tl431c v ref v ka =v ref , i k =10ma 2.445 2.495 2.545 v deviation of reference input voltage over-temperature (note) v ref(dev) v ka =v ref , i k =10ma t min t a t max - 4.5 17 mv i k =10ma, v ka =10v~v ref - -1.0 -2.7 ratio of change in reference input voltage to the change in cathode voltage v ref / v ka i k =10ma, k ka =36v~10v - -0.5 -2.0 mv/ v reference input current i ref i k =10ma, r 1 =10k , r 2 = - 1.5 4 a deviation of reference input current over full temperature range i k =10ma, r 1 =10k , r 2 = , t a =full range - 0.4 1.2 a i ref(dev) minimum cathode current for regulation i k(min) v ka =v ref - 0.45 1.0 ma off-state cathode current i k(off) v ka =36v, v ref =0 - 0.05 1.0 a dynamic impedance v ka =v ref , f 1.0khz |z ka | - 0.15 0.5 i k =1 to 100ma note : tmin=0 , tmax=70 in v z fig3. test circuit for off-state current fig 2. test circuit for v z >v ref note : v z =v ref (1+r 1 /r 2 )+i ref xr 1 v ref r2 i z i ref in v z i i fig1. test circuit for v z =v ref r1 v z i z v ref i ref i i in anode reference + - v ref cathode anode reference cathode
cystech electronics corp. spec. no. : c502m3 issued date : 2003.04.02 revised date : 200712.24 page no. : 3/6 TL431M3 cystek product specification characteristic curves cathode current vs cathode voltage -100 -75 -50 -25 0 25 50 75 100 125 150 -2 -1 0 1 2 3 v ak - cathode voltage (v) i k - cothode current (ma) cathode current vs cathode voltage -200 -100 0 100 200 300 400 500 600 700 800 -1 -0.5 0 0.5 1 1.5 2 2.5 3 v ak - cathode voltage (v) i k - cothode current (ua) reference input voltage vs ambient temperature 2.48 2.485 2.49 2.495 2.5 2.505 2.51 2.515 2.52 -50 -25 0 25 50 75 100 125 ambient temperature( ) vref - reference input voltage (mv) reference input current vs ambient temperature 0 50 100 150 200 250 300 350 0 25 50 75 100 125 ambient temperature( ) vref - reference input current (na)
cystech electronics corp. spec. no. : c502m3 issued date : 2003.04.02 revised date : 200712.24 page no. : 4/6 TL431M3 cystek product specification characteristic curves(cont.) cathode voltage vs reference input voltage -30 -25 -20 -15 -10 -5 0 0 5 10 15 20 25 30 35 40 v ka - cathode voltage (v) vref - reference input voltage (mv) dynamic impedance vs frequence 0.1 1 10 100 1 10 100 1000 f - frequence (khz) z ka - dynamic impedance () open-loop voltage gain vs frequency 0 10 20 30 40 1 10 100 1000 f - frequency (khz) open-loop voltage gain (db) ordering information device package shipping marking sot-89 TL431M3 1000 pcs / tape & reel 431 (pb-free)
cystech electronics corp. spec. no. : c502m3 issued date : 2003.04.02 revised date : 200712.24 page no. : 5/6 TL431M3 cystek product specification recommended wave soldering condition soldering time product peak temperature pb-free devices 5 +1/-1 seconds 260 +0/-5 c recommended temperature profile for ir reflow profile feature sn-pb eutectic assembly pb-free assembly average ramp-up rate (tsmax to tp) 3 c/second max. 3c/second max. preheat ? temperature min(t s min) ? temperature max(t s max) ? time(ts min to ts max ) 100 c 150 c 60-120 seconds 150 c 200 c 60-180 seconds time maintained above: ? temperature (t l ) 183 c 60-150 seconds ? time (t l ) 217 c 60-150 seconds peak temperature(t p ) 240 +0/-5 c 260 +0/-5 c time within 5 c of actual peak 10-30 seconds 20-40 seconds temperature(tp) ramp down rate 6 c/second max. 6c/second max. time 25 c to peak temperature 6 minutes max. 8 minutes max. note : all temperatures refer to topside of the package, measured on the package body surface.
cystech electronics corp. spec. no. : c502m3 issued date : 2003.04.02 revised date : 200712.24 page no. : 6/6 sot-89 dimension *: typical inches millimeters inches TL431M3 cystek product specification millimeters dim min. max. min. max. dim min. max. min. max. a 0.1732 0.1811 4.40 4.60 f 0.0583 0.0598 1.48 1.527 b 0.1594 0.1673 4.05 4.25 g 0. 1165 0.1197 2.96 3.04 c 0.0591 0.0663 1.50 1.70 h 0.0551 0.0630 1.40 1.60 d 0.0945 0.1024 2.40 2.60 i 0.0138 0.0161 0.35 0.41 e 0.01417 0.0201 0.36 0.51 notes: 1.controlling dimension: millimeters. 2.maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.if there is any question with packing spec ification or packing method, please cont act your local cystek sales office. material: ? lead: 42 alloy ; solder plating ? mold compound: epoxy resin family, flammability solid burning class: ul94v-0 important notice: ? all rights are reserved. reproduction in whole or in part is prohibited without the prior written approval of cystek. ? cystek reserves the right to make changes to its products without notice. ? cystek semiconductor products are not warranted to be suitab le for use in life-support applications, or systems. ? cystek assumes no liability for any consequence of customer pr oduct design, infringement of pat ents, or application assistance . 431 3-lead sot-89 plastic surface mounted package cystek package code: m3 e f g c b a i d h 3 2 1 marking: 431 device name date code style: pin 1. reference 2. anode 3. cathode
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