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1 gs432 www.gs-power.com adjustable precision shunt regulators product description features ? precise reference voltage to 1.240v ? guaranteed 1% reference voltage to l e r a n c e ? sink current capability, 80 a to 100ma ? quick turn-on ? adjustable output voltage, v o = v ref to 16v ? 0.2 ? typical output impedance ? to-92 and sot-23 and sot-89 package applications the gs432 is a 3 terminal adjustable voltage reference with specifie d thermal stability over applicable commercial temperature ranges. output voltage may be set to any value between v ref (1.24v) and 16v with two external resistors (see figure 2). when used with a photo-coupler, the gs432 is an ideal voltage reference in isolated feedback circuits for 1.24v to 16v switching-mode power supplies. this device has a typical output impedance of 0.05 ? . active output circuitry provides a very sharp turn-on characteristic, making the gs432 excellent replacements for zener diodes in many applications, including on-board regulation and adjustable power supplies. ? linear regulators ? adjustable power supplies ? switching power supplies block diagram & symbol block diagram symbol ref cathode vref anode + -
2 www.gs-power.com gs432 packages & pin assignments gs432jw (sot-23) gs432jz (sot-23) gs432z (sot-23-3l) gs432w (sot-23-3l) 1 ref 1 cathode 1 ref 1 cathode 2 cathode 2 ref 2 cathode 2 ref 3 anode 3 anode 3 anode 3 anode gs432y (sot-89) gs432l (to-23-5l) gs432s (sop-8) 1 ref 1 nc 1 cathode 5 nc 2 anode 2 nc 2 anode 6 anode 3 cathode 3 cathode 3 anode 7 anode 4 ref 4 nc 8 ref 5 anode 1 cathode 5 nc ordering information device package gs432jwf sot-23 gs432jzf sot-23 gs432wf sot-23-3l gs432zf sot-23-3l gs432lf sot-23-5l gs432sf sop-8 GS432YF sot-89
3 www.gs-power.com gs432 marking information sot-23 sop-8 & sot-89 absolute maximum ratings symbol parameter rating unit v ka cathode voltage 20 v i k continuous cathode current range 100 ma i ref reference current range 3 ma ja thermal resistance junction to ambient sot-23 sot-23-5l sop-8 sot-89 833 833 192 250 oc/w p d power dissipation sot-23 sot-23-5l sop-8 sot-89 0.15 0.15 0.625 0.5 w t opr ambient temperature range -40 to 85 oc t j junction temperature range 0 to 125 oc t stg storage temperature range -65 to 150 oc t lead lead temperature range, (soldering, 10sec) 260 oc
4 www.gs-power.com gs432 electrical characteristics t a =25oc (unless otherwise noted) gs432(a) gs432(b) symbol parameter test conditions min typ max min typ max unit v ref reference voltage v ka = v ref , i k =10ma (fig.1) 1.234 1.240 1.246 1.228 1.240 1.252 v v dev v ref te m p deviation t a = full range ( note 1 ) v ka = v ref , i k =10ma (fig.1) 10 25 10 25 mv v ref v ka voltage ration (open loop gain) i k =10ma, v ka = 14.5v to v ref (fig.2) -2.7 -1 -2.7 -1 mv/v i ref reference input current i k =10ma r 1 =10k ? , r 2 = (fig.2) 0.15 0.5 0.15 0.5 a i ref(dev) i ref te m p deviation t a = full range ( note 1 ) r 1 =10k ? , r 2 = , i k =10ma (fig.2) 0.1 0.4 0.1 0.4 a i k (min) min.cathode current v ka = v ref (fig.1) 20 80 20 80 a i k (off) off-state cathode current v ka =14.5v, v ref =0v (fig.3) 0.135 0.15 0.135 0.15 a | z ka | dynamic output impedance v ka =v ref , i k =1ma to 100ma, f 1khz (fig.1) 0.05 0.15 0.05 0.15 ? note 1: full temperature range is -40oc to 105oc
5 www.gs-power.com gs432 test circuits v ka = v ref , v o = v ka = v ref figure 1. input v ka i k vref r1 r2 i ref v ka= vref(1+ )+ i ref r1 r1 r2 v ka < v ref , v o = v ka figure 2. figure 3. i k(off)
6 www.gs-power.com gs432 typical performance characteristics 0 50 100 150 1.23 vref.vs free-air temperature v r e f . ( v ) 1.250v 1.241v 1.227v c 1.22 1.24 1.25 1.26 o temperature( ) iref. vs free-air temperature 0.25 0.2 0.15 0.1 0.05 0 0 20 40 60 80 100 120 ire f . ( u a ) c o temperature( ) 0 20 40 60 80 100 120 0.15 0.1 0.05 0 -0.05 ik(off)vs. free-air temperature ik ( o f f )- ( u a ) c o temperature( ) temperature( ) 0 204060 80100120 0.0015 0.001 0.0005 raito of delta vref to delta vk vs temperature d v r ef / d v k ( m v / v ) c o -1 -0.5 10 0 -5 5 -10 -15 0.5 1 1.5 0 vka(v) ik ( m a ) cathode current vs cathode voltage
7 www.gs-power.com gs432 typical applications v+ v ref r2 r1 v o v o = (1+r1/r2)v ref shunt regulator v on ? 2v v off = v+ v+ out gnd in v th ? 2.5v single supply comparator with temperature compensated threshold figure 4. figure 5. gs432 common r2 r1 vo out in vi ua7805 vo=[1+( r1/r2)]*vr e min vo=vref+5v gs7805 output control of a 3-terminal fixed regulator gs7805 vi gs432 30 0.01 uf r1 r2 vo vo=( 1+r1/r2)vref 0.01uf 30 series regulator figure 6. figure 7. vi r1 r2 gs432 r vo c crowbar circuit rc 0.1% r vi io io=( vref / rc)+ika r=vi / [ (io / hfe) + gs432 precision current limiter figure 8. figure 9.
8 www.gs-power.com gs432 typical applications (continued) r 0.1% io=v ref/r vi io gs432 i o =vref / r r precision constant-current sink r2 vi vo gs432 r1 vo=( 1+r1/r2)vref high current shunt regulator figure 10. figure 11. r4 r1 r3 r2 gs432 out on when low 9 www.gs-power.com gs432 package dimension so-8 plastic package a1 a a2 e1/2 e1 d b e e/2 pin 1 marking c h e r1 r gauge plane l2 1 2 1 l l1 dimensions millimeters inches symbol min max min max a 1.35 1.75 .053 .069 a1 0.10 0.25 .004 .010 a2 1.25 1.65 .049 .065 b 0.31 0.51 .012 .020 c 0.17 0.25 .007 .010 d 4.90 (typ) .193 (typ) e 6.00 (typ) .236 (typ) e1 3.90 (typ) .154 (typ) e 1.27 (typ) .050 (typ) l 0.40 1.27 .016 .050 l1 1.04 (typ) .041 (typ) l2 0.25 (typ) .010 (typ) r 0.07 - .003 - r1 0.07 - .003 - h 0.25 0.50 .010 .020 0 8 0 8 1 5 15 5 15 2 0 - 0 -
10 www.gs-power.com gs432 sot-89 plastic package d d1 h l b1 b e e1 ee1 a c dimensions millimeters inches symbol min max min max a 1.40 1.60 .055 .063 b 0.44 0.56 .017 .022 b1 0.36 0.48 .014 .019 c 0.35 0.44 .014 .017 d 4.40 4.60 .173 .181 d1 1.62 1.83 .064 .072 e 2.29 2.60 .090 .102 e1 2.13 2.29 .084 .090 e 1.50 (typ) .059 (typ) e1 3.00 (typ) .118 (typ) h 3.94 4.25 .155 .167 l 0.89 1.20 .035 .047
11 www.gs-power.com gs432 sot-23 plastic package d e e1 b e1 e a2 a a1 l l1 g c dimensions millimeters inches symbol min max min max a 0.75 1.17 .030 .046 a1 0.05 0.15 .002 .006 a2 0.70 1.02 .028 .040 b 0.30 0.50 .012 .020 c 0.08 0.20 .003 .008 d 2.80 3.04 .110 .120 e 2.10 2.64 .083 .104 e1 1.20 1.40 .047 .055 e 0.95 (typ) .037 (typ) e1 1.90 (typ) .075 (typ) l 0.40 0.60 .016 .024 l1 0.54 (typ) .021 (typ) g 0.25 (typ) .010 (typ) 0 8 0 8
12 www.gs-power.com gs432 sot-23-3l plastic package dimensions millimeters inches symbol min max min max a 1.05 1.25 0.041 0.049 a1 0 0.1 0 0.004 a2 1.05 1.15 0.041 0.045 b 0.3 0.5 0.012 0.020 c 0.1 0.2 0.004 0.008 d 2.82 3.02 0.111 0.119 e 1.5 1.7 0.059 0.067 e1 2.65 2.95 0.104 0.116 e 0.950 (typ) 0.037 (typ) e1 1.8 2 0.071 0.079 l 0.3 0.6 0.012 0.024 q 0 8 0 8
13 www.gs-power.com gs432 sot-23-5l plastic package d e e1 b e1 e a2 a a1 l (l1) c g dimensions millimeters inches symbol min max min max a 0.95 1.45 .037 .057 a1 0.05 0.15 .002 .006 a2 0.90 1.30 .035 .051 b 0.30 0.50 .012 .020 c 0.08 0.20 .003 .008 d 2.80 3.00 .110 .118 e 2.60 3.00 .102 .118 e1 1.50 1.70 .059 .067 e 0.95 (typ) .037 (typ) e1 1.90 (typ) .075 (typ) l 0.35 0.55 .014 .022 l1 0.60 (typ) .024 (typ) g 0.25 (typ) .010 (typ) 0 8 0 8
additional information : ?? ??? : ????? (diwell electronics co., ltd.) ??? ??? ??? 358 ???????? 202? 202, kunpo business incubator center, 358, dangjung-dong, gunpo-city, gyeonggi-do, south korea phone : 070-8235-0820 (+82-70-8235-0820) fax : 031-429-0821 (+82-31-429-0821) ?? ? ?? ?? email : expoeb2@diwell.com , dsjeong@diwell.com

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