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# ? precise reference voltage to 1.24v ? guaranteed 0.5% or 1% reference voltage tolerance ? sink current capability , 60ma to 100ma ? quick turn-on ? adjustable output voltage , v o = v ref to 20v ? low operational cathode current , 60ma typical ? 0.1 ? typical output impedance ? sot-23-5 packages
? linear regulators ? adjustable power supply ? switching power supply the apl1431l is a 3-terminal low voltage adjust- able precision reference with specified thermal sta- bility over applicable commercial temperature ranges . output voltage may be set to any value between v ref (1.24 v) and 20 v with two external resistors (see figure 2) . when used with an photocoupler , the apl1431l is an ideal voltage reference in iso- lated feedback circuits for 1.24v to 12v switching- mode power supplies . this device has a typical output impedance of 0.1 ? . active output circuitry provides a very sharp turn-on characteristic , mak- ing the apl1431l excellent replacements for zener diodes in many applications , including on-board regulation and adjustable power supplies .

cathode anode ref nc nc anode ref cathode 123 4 5 + ? cathode anode ref v ref

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t a = 25 c ( unless otherwise noted) "# #$ %& apl1431l elec. grade handling code temp. range package code elec. grade a : 0.5% reference voltage tolerance b : 1% reference voltage tolerance package code b : sot- 23 - 5 temp. range c : 0 to 70 c i : -40 to 85 c handling code pb : plastic bag tb : tape & box tr : tape & reel lead free code l : lead free device blank : original device apl1431l b : 1431l lead free code symbol parameter rating unit v ka cathode voltage 20 v i k continuous cathode current 100 ma i ref reference current 3 ma ja thermal resistance from junction to ambient in free air sot-23-5 357 c/w t j operating junction temperature range -40 to 150 c t stg storage temperature range -65 to 150 c t sol lead temperature range, t s (soldering, 10sec) 260 c apl1431l symbol parameter test conditions min. typ. max. unit apl1431la 1.234 1.240 1.246 v ka =v ref , i k =10ma t a = 25 c, (fig. 1) apl1431lb 1.228 1.240 1.252 apl1431la 1.222 1.240 1.258 v ref reference voltage t a = full range (see note 1), (fig. 1) apl1431lb 1.215 1.240 1.265 v v dev v def temp deviation t a = full range(see note 1), v ka =v ref , i k =10ma, (fig. 1) 515mv ? v ref / ? v ka ratio of change in v ref to change in cathode voltage i k =10ma, ? v ka =16v to v ref (fig. 2) -0.2 -1.0 mv/v i ref reference input current i k =10ma, r 1 =10k ? , r 2 = (fig. 2) 0.15 0.5 a

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figure 1. test circuit for v ka =v ref , v o =v ka =v ref figure 2. test circuit for v ka >v ref , v o = v ka = v ref (1+r 1 /r 2 ) + i ref r 1 figure 3. test circuit for i k(off)

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t a = 25 c ( unless otherwise noted) note : 1. full temperature range is 0 c to 70 c for apl1431lxxc, and ?40 c to 85 c for apl1431lxxi apl1431l symbol parameter test conditions min. typ. max. unit i ref(dev) i ref te m p d e v ia t i o n t a = full range(see note 1), r 1 =10k ? , r 2 = , i k =10ma, (fig. 2) 0.05 0.3 a v k =6v 0.01 0.1 i k(off) off-state cathode current v ref =0v, (fig. 3) v k =16v 0.01 0.5 a z ka dynamic output impedance v ka =v ref , i k =100 a to 100ma , f<1khz , (fig. 1 ) 0.1 0.3 ? i k(min) minimum operating current v ka =v ref , (fig. 1) 60 80 a v ref v o v in i k v ref v o v in i k i ref r 1 r 2 v o i k(off) v in

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notes for application circuits: 1) to improve the stability of output voltage , a 0.1 f capacitor between cathode and anode of apl431l is strongly recommended. 2) set v o according to the following equation: v o = v ref (1+r1/ r2)+ i ref r1 3) choose the value for r b as follows: ? the maximum limit for r b should be such that the cathode current( i k ) is greater than the minimum operating current (60 a) at v in (min) . ? the minimum limit for r b should be such that the cathode current (i k ) does not exceed 100ma under all load conditions, and the instantaneous turn-on value for i k does not exceed 150ma . both of the following conditions must be met : r b,min v in(max) / 150ma ( to limit instantaneous turn-on i k ) r b,min v in(max) - v o / i o (min) + 100ma (to limit i k under normal operating conditions)

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precision voltage reference precision voltage regulator v o v in apl431l r b r 1 r 2 gnd v ref 0.1 f v o v in apl431l r b r 1 r 2 v ref 0.1 f

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-1 -0.5 0 0.5 1 1.5 -300 -200 -100 0 100 200 300 -150 -100 -50 0 50 100 150 -1.5 -1 -0.5 0 0.5 1 1.5 -40 -20 0 20 40 60 80 100 1.234 1.236 1.238 1.24 1.242 1.244 1.246 1.248 reference voltage (v) reference input current (na) junction temperature ( c) junction temperature ( c) cathode voltage (v) cathode current (ma) cathode voltage (v) cathode current ( a) 50 75 100 125 150 -40 -20 0 20 40 60 80 100 t a =25 c v ka =v ref t a =25 c v ka =v ref i k =10ma i k =10ma r1=10k ? r2=

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( )* junction temperature ( c) ratio of delta reference voltage to delta cathode voltage (-mv/v) junction temperature ( c) off state cathode current (na) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 -40 -20 0 20 40 60 80 100 i k =10ma ? v ka = 16v to v ref 0 50 100 150 200 250 -40 -20 0 20 40 60 80 100 v ref =0v v ka =16v

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$ %& sot-23-5 e1 e1 e b 12 3 4 5 e d a2 a a1 l 2 l l 1 a millimeters inches dim min. max. min. max. a 0.95 1.45 0.037 0.057 a1 0.05 0.15 0.002 0.006 a2 0.90 1.30 0.035 0.051 b 0.30 0.50 0.011 0.019 d 2.8 3.00 0.110 0.118 e 2.6 3.00 0.102 0.118 e1 1.5 1.70 0.059 0.067 e 0.95bsc 0.037bsc e1 1.90bsc 0.074bsc l 0.35 0.55 0.014 0.022 l1 0.20 bsc 0.008 bsc l2 0.5 0.7 0.020 0.028 n 5 5 0 10 0 10

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t 25 c to peak tp ramp-up t l ramp-down ts preheat tsmax tsmin t l t p 25 temperature time critical zone t l to t p & + # (ir/convection or vpr reflow) &
& + & sn-pb eutectic assembly pb-free assembly profile feature large body small body large body small body average ramp-up rate (t l to t p ) 3 c/second max. 3 c/second max. preheat temperature min (tsmin) temperature mix (tsmax) time (min to max)(ts) 100 c 150 c 60-120 seconds 150 c 200 c 60-180 seconds tsmax to t l - ramp-up rate 3 c/second max tsmax to t l temperature(t l ) time (t l ) 183 c 60-150 seconds 217 c 60-150 seconds peak temperature(tp) 225 +0/-5 c 240 +0/-5 c 245 +0/-5 c 250 +0/-5 c time within 5 c of actual peak temperature(tp) 10-30 seconds 10-30 seconds 10-30 seconds 20-40 seconds ramp-down rate 6 c/second max. 6 c/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 body surface. terminal material solder-plated copper (solder material : 90/10 or 63/37 snpb), 100%sn lead solderability meets eia specification rsi86-91, ansi/j-std-002 category 3.

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/ t ao e w po p ko bo d1 d f p1 ', a j b t2 t1 c ' test item method description solderability mil-std-883d-2003 245 c, 5 sec holt mil-std-883d-1005.7 1000 hrs bias @125 c pct jesd-22-b,a102 168 hrs, 100 % rh, 121 c tst mil-std-883d-1011.9 -65 c~150 c, 200 cycles esd mil-std-883d-3015.7 vhbm > 2kv, vmm > 200v latch-up jesd 78 10ms, 1 tr > 100ma application a b c j t1 t2 w p e 178 1 72 1.0 13.0 + 0.2 2.5 0.15 8.4 2 1.5 0.3 8.0 0.3 4 0.1 1.75 0.1 f d d1 po p1 ao bo ko t sot-23-5 3.5 0.05 1.5 0.1 1.5 0.1 4.0 0.1 2.0 0.1 3.15 0.1 3.2 0.1 1.4 0.1 0.2 0.033 (mm)

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application carrier width cover tape width devices per reel sot- 23-5 8 5.3 3000 -' anpec electronics corp. head office : 5f, no. 2 li-hsin road, sbip, hsin-chu, taiwan, r.o.c. tel : 886-3-5642000 fax : 886-3-5642050 taipei branch : 7f, no. 137, lane 235, pac chiao rd., hsin tien city, taipei hsien, taiwan, r. o. c. tel : 886-2-89191368 fax : 886-2-89191369 -

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