1/9 n low voltage operation : 1.24 to 6v n 2%, 1% and 0.5% voltage precision n wide operating range cathode current : 60 m a to 30ma n low output impedance : 0.2 w n typically stable for any capaci- tive loads n esd protection : 2kv (human body model) 200v (machine model) n 100ppm/c temperature coefficient description the ts431 is a low voltage three terminals pro- grammable shunt voltage reference. the output voltage can be set to any value between vref (1.24v) and 6v with two external resistors. the ts431 is able to operate at a lower voltage (1.24v) and lower cathode current than the wide- spread tl431 and tl1431 shunt voltage refer- ence. when driving an optocoupler, the ts431 is partic- ularly interesting to regulate 3.3v switching power supplies. order code z = to92 plastic package - also available in bulk (z), tape & reel (zt) and ammo pack (ap) lt = tiny package (sot23-5) - only available in tape & reel (lt) pin connections (top view) part number temperature range package sot-23 marking zl ts431i -40c, +125c l272 ts431ai l271 ts431bi l270 z to92 (plastic package) l sot23-5 (plastic micropackage) to92 (top view) sot23-5 (top view) ts431 low voltage adjustable shunt reference september 2003
ts431 2/9 absolute maximum ratings operating conditions electrical characteristics t amb = 25c (unless otherwise specified) symbol parameter value unit v ka cathode to anode voltage 10 v i k continuous cathode current range -20 to +40 ma i ref reference input current range -0.05 to +3 ma p d power dissipation 1) to92 package sot23-5 package 625 500 mw t std storage temperature range -65 to +150 c 1. t junction =150c, t amb =25c with r thj-a =200c/w for to92 package and r thj-a =250c/w for sot23-5l package symbol parameter value unit v ka cathode to anode voltage 1.24 to 6 v i k cathode current 0.06 to 30 ma t oper operating free air temperature range -40 to +125 c symbol parameter test condition min. typ. max. unit vref output voltage v ka = v ref @ i k = 100 m a ts431 ts431a ts431b 1.215 1.228 1.234 1.240 1.265 1.252 1.246 v d v ref output voltage change 1) 2) i k = 100 m a, v ka = v re f 1. limits are 100% production tested at 25c. limits over temperature are guaranteed through correlation and by design. 2. d v ref is defined as the difference between the maximum and minimum values obtained over the full temperature range. d v ref = v ref max. - v ref min. 0 < t amb < +70c -40 < t amb < +85c -40 < t amb < +105c -40 < t amb < +125c 9 16 18 21 mv ratio of change in reference input voltage to change in cathode to anode voltage i k = 10ma v ka = 6v to v ref 1.8 2.7 mv/v i ref reference input current i k = 10ma 70 160 na d i ref reference input current deviation over temperature range i k =10ma r 1 =10k w r 2 = -40 < t amb < +85c -40 < t amb < +125c 70 90 160 240 na i min minimum cathode current for regulation v ka = v ref 40 60 m a i off off-state cathode current v ka = 6v , v ref = 0 0.001 0.1 m a r ka static impedance v ka = v ref , i k = 0.1 to 15ma 0.2 0.4 w d vref d vka ---------------- t1 t2 temperature vref min. vref max.
ts431 3/9 reference voltage vs temperature cathode voltage vs cathode current reference input current vs temperature test circuit for vka = vref cathode voltage vs cathode current static impedance vs temperature -40-20 0 20406080100120 temperature (c) 1.228 1.232 1.236 1.24 1.244 1.248 1.252 reference voltage (v) vka = vref ik = 100 a -1 -0.5 0 0.5 1 1.5 vka cathode voltage (v) -15 -10 -5 0 5 10 15 ika cathode current (ma) vka = vref t = 25c -40-20 0 20406080100120 temperature (c) 0 20 40 60 80 100 iref reference current (na) ik = 10ma r1 = 10 k w r2 = + input vka vref ik output 0 102030405060 ika cathode current (a) 0 0.5 1 1.5 vka cathode voltage (v) -40c +25c +85c +125c -40-20 0 20406080100120 temperature (c) 0 0.1 0.2 0.3 0.4 rka static impedance (ohms) vka = vref ik = 100a to 15ma
ts431 4/9 off-state current vs temperature ratio of change in reference input voltage to change in vka voltage vs temperature phase and gain vs frequency test circuit for off-state current measurement test circuit for vka > vref test circuit for phase and gain measurement -40-20 0 20406080100120 temperature (c) 0 50 100 150 200 ioff off-state current (na) -40-20 0 20406080100120 temperature (c) -3 -2 -1 0 ratio of change in reference input voltage (mv/v) ik = 10ma vka = 6v to vref 1e+3 1e+4 1e+5 1e+6 frequency (hz) 0 10 20 30 40 50 60 gain (db) -150 -100 -50 0 50 100 150 phase () phase margin # 50 gain phase input vka=6v ioff input ik vka = vref . (1+r1/r2) + iref . r1 vka r1 r2 iref vref input vref ik=100a output 10f 10f 6.8k 4.3k
ts431 5/9 pulse response at ik=100a pulse response at ik = 1ma equivalent input noise vs frequency test circuit for pulse response at ik = 100a test circuit for pulse response at ik = 1ma 012345678910 time (s) 0 1 2 3 input and output voltage (v) input voltage output voltage 01234567 time (s) 0 1 2 3 input and output voltage (v) input voltage output voltage 0.1 1 10 100 1000 frequency (khz) 0 50 100 150 200 250 equivalent input noise (nv/vhz) vka = vref ik = 100 a t=25c ik=100a output 50 w 18k w pulse generator f=100khz intput ik=1ma output 50 w 1.8k w pulse generator f=100khz intput
ts431 6/9 package mechanical data 3 pins - plastic package to92 (tape & reel) dim. millimeters inches min typ. max. min. typ. max. al 5.0 0.197 a 5.0 0.197 t 4.0 0.157 d 0.45 0.018 i1 2.5 0.098 p 11.7 12.7 13.7 0.461 0.500 0.539 po 12.4 12.7 13 0.488 0.500 0.512 p2 5.95 6.35 6.75 0.234 0.250 0.266 f1/f2 2.4 2.5 2.8 0.094 0.098 0.110 d h -1 0 1 -0.039 0 0.039 d p -1 0 1 -0.039 0 0.039 w 17.5 18.0 19.0 0.689 0.709 0.748 w0 5.7 6 6.3 0.224 0.236 0.248 w1 8.5 9 9.75 0.335 0.354 0.384 w2 0.5 0.020 h 20 0.787 h0 15.5 16 16.5 0.610 0.630 0.650 h1 25 0.984 do 3.8 4.0 4.2 0.150 0.157 0.165 l1 11 0.433 a1 p p a t h h1 h l1 d i1 h0 w2 w0 w1 w d0 f1 f2 p2 p0
ts431 7/9 package mechanical data 3 pins - plastic package to92 (tape ammo pack) dim. millimeters inches min typ. max. min. typ. max. al 5.0 0.197 a 5.0 0.197 t 4.0 0.157 d 0.45 0.018 i1 2.5 0.098 p 11.7 12.7 13.7 0.461 0.500 0.539 po 12.4 12.7 13 0.488 0.500 0.512 p2 5.95 6.35 6.75 0.234 0.250 0.266 f1/f2 2.4 2.5 2.8 0.094 0.098 0.110 d h -1 0 1 -0.039 0 0.039 d p -1 0 1 -0.039 0 0.039 w 17.5 18.0 19.0 0.689 0.709 0.748 w0 5.7 6 6.3 0.224 0.236 0.248 w1 8.5 9 9.75 0.335 0.354 0.384 w2 0.5 0.020 h 20 0.787 h0 15.5 16 16.5 0.610 0.630 0.650 h1 25 0.984 do 3.8 4.0 4.2 0.150 0.157 0.165 l1 11 0.433 a1 p p a t h h1 h l1 d i1 h0 w2 w0 w1 w d0 f1 f2 p2 p0
ts431 8/9 package mechanical data 3 pins - plastic package to92 (bulk) dim. mm. mils min. typ max. min. typ. max. a 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 d 4.45 4.95 175.2 194.9 e 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 l 12.7 15.49 500.0 609.8 r 2.16 2.41 85.0 94.9 s1 0.92 1.52 36.2 59.8 w 0.41 0.56 16.1 22.0 to-92 mechanica data 0102782/c
ts431 9/9 package mechanical data dim. mm. mils min. typ max. min. typ. max. a 0.90 1.45 35.4 57.1 a1 0.00 0.15 0.0 5.9 a2 0.90 1.30 35.4 51.2 b 0.35 0.50 13.7 19.7 c 0.09 0.20 3.5 7.8 d 2.80 3.00 110.2 118.1 e 2.60 3.00 102.3 118.1 e1 1.50 1.75 59.0 68.8 e.95 37.4 e1 1.9 74.8 l 0.35 0.55 13.7 21.6 sot23-5l mechanical data 0 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners. ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech repubic - finland - france - germany hong kong - india - israel - italy - japan - malaysia - malta - morocco - singapore - spain sweden - switzerland - united kingdom - united states http://www.st.com
|
