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ksd-i5c013-001 1 sg431/sgf431 programmable voltage reference ? description the sg431 series are 3-terminal precision shunt regulators that are programmable over a wide voltage range of 2.495v to 36v with 0.3%, 0.5%, 1.0% tolerance. the sg431 series have a low dynamic impedance of 0.15 ? . these features make the sg431 series an excellent replacement for zener diodes in numerous applications circuits that require a precision reference voltage. ? features ? programmable output voltage from 2.495v to 36v ? voltage reference toleran ce : 0.3%, 0.5%, 1.0% ? cathode current capability of 1ma to 100ma [ k : cathode, a: anode, r : reference ] pkg : sot-89 apply device : sg431xf r ? pin assignment pkg : sot-23 apply device : sg431xs pkg : sot-23 apply device : sgf431xs pkg : sot-25 apply device : sg431xn pkg : to-92 apply device : sg431x ak a r a k nc nc k ra k ra pkg : to-92m apply device : sg431xm (marking side view) (top view) (top view) (top view) (top view) (marking side view) (1)k (2)r (3)a (1)r (2)k (3)a
ksd-i5c013-001 2 sg431/sgf431 vref tolerance pkg type device name marking 1% to-92 sg431a sg431 a to-92m sg431am sg431 a sot-23 sg431as 1) 4ja ) sot-23 sgf431as ) 4la ) sot-25 sg431an l4a ) sot-89 SG431AF sg431a 0.5% to-92 sg431b sg431 b to-92m sg431bm sg431b sot-23 sg431bs 1) 4jb ) sot-23 sgf431bs ) 4lb ) sot-25 sg431bn l4b ) sot-89 sg431bf sg431b 0.3% sot-23 sg431cs 1) 4jc ) sot-23 sgf431cs ) 4lc ) 1) sg431xs pin connection : (1) cathode, (2) reference, (3) anode 2) sgf431xs pin connection : (1) reference, (2) cathode, (3) anode 3) : year & week code 4) : machine code [sot-23 pkg.] ? symbol ? functional block diagram ? ordering information cathode(k) anode(a) reference(r) reference(r) v ref =2.495v cathode(k) anode(a) + C
ksd-i5c013-001 3 sg431/sgf431 ? absolute maximum ratings [ta=25 ] characteristic symbol rating unit cathode to anode voltage v ka 37 v cathode current range (continuous) i k -100~150 ma reference input current range i ref -0.05~10 ma power dissipation sot-23 p d (note1) 350 mw sot-25 p d (note1) 400 sot-89 p d (note1) 500 to-92 p d (note2) 700 to-92m p d (note2) 400 junction temperature t j 150 operating temperature range t opr -40 ~ +85 storage temperature range t stg -55 ~ +150 note 1 : mounted on a glass epoxy pcb board (25.4 25.4mm).t a =25 note 2 : t a =25 ? recommended operating conditions characteristic symbol rating unit min. max. cathode to anode voltage v ka v ref 36 v cathode current i k 1 100 ma ? electrical characteristics (ta=25 , unless otherwise noted.) characteristic symbol condi tion min. typ. max. unit reference voltage (fig.1) v ref v ka =v ref , i k =10ma sg431c 2.487 2.495 2.503 v sg431b 2.482 2.508 sg431a 2.470 2.520 reference input voltage deviation over temperature (fig.1, note1,2) ? v ref v ka =v ref , i k =10ma @ -40 ? c ta 85 ? c - 7 30 mv ratio of delta reference input voltage to delta cathode voltage (fig.2) ? v ref i k =10ma v ref v ka 36v - -1.0 -2.7 mv/v ? v ka reference current (fig.2) i ref i k =10ma, r1=10k ? , r2= ? - 1.8 4.0 ? reference input current deviation over temperature (fig.2, note 1,2) ? i ref i k =10ma, r1=10k ? , r2= ? @ -40 ? c ta 85 ? c - 0.4 2.5 ? minimum cathode current for regulation i k(min) v ka =v ref - 0.35 0.6 m off-state cathode current (fig.3) i k(off) v ka =36v, v ref =0v - 2.7 1000 na dynamic impedance (fig.1, note3) z ka v ka =v ref , f ? 1.0khz 1.0ma i k 100ma - 0.15 0.5 ?
ksd-i5c013-001 4 sg431/sgf431 1 2 1 ) 1( r i r r ref ref ka v v ? ? ? ? ? note. 1. ambient temperature range: t low = -40 , t high = 85 2. the deviation parameters v ref and i ref are defined as the difference betwee n the maximum value and minimum value obtained over the full operating ambient temperature range that applied. the average temperature coefficien t of the reference input voltage, ref v is defined as: t ) 10 ) 25 = t ( v v ( =) ppm ( v a 6 a ref ref ref example : v ref = 30mv and the slope is positive, v ref @ 25 = 2.495v ta = 70 3. the dynamic impedance z ka is defined as: k ka ka i v = when the device is operating with two external resistors, r1 a nd r2, (refer to fig.2) the total dynamic impedance of the circui t is given by: ) r r +1( = 2 1 ka ' ka fig. 1 test circuit for v ka =v ref fig. 2 test circuit for v ka >v ref fig. 3 test circuit for i k(off) ka input r1 r2 v i k(off) i ref v ref i k ka v input i k ? v ref = v ref max C v ref min ? ta = t 2 C t 1 ambient temperature ka v input / ppm 171 = 70 10) 495 .2 03.0 ( =) ppm ( v 6 ref
ksd-i5c013-001 5 sg431/sgf431 ? electrical characteristic curves fig.4 v ref vs t a reference voltage change - v ref [%] ambient temperature - t a [ ] reference input current - i ref [ a] ambient temperature - t a [ ] fig.5 i ref vs t a fig.6 i ka vs v ka cathode current - i ka [ma] cathode voltage - v ka [ v] fig.7 i ka vs v ka cathode voltage - v ka [ v] fig.8 i off vs t a off-state cathode current - i off [na] ambient temperature - t a [ ] fig.9 v ref vs v ka cathode voltage - v ka [ v] cathode current - i ka [ a] delta reference voltage - v ref [ mv ] v ka =v ref i k =10ma i k =10ma r1=10k ? r2= v ka =v ref t a =25 v ka =v ref t a =25 v ka = 36v v ref =0v i k =10ma t a =25
ksd-i5c013-001 6 sg431/sgf431 220 ? 10 f i k 10k ? 10k ? output gnd voltage gain test circuit 500 ? i k vout gnd rs=100 ? vin z ka = vout/vin x rs dynamic impedance test circuit 1uf ? electrical characteristic curves fig.10 a v vs f voltage gain - a v [db] frequency - f [ hz] fig.11 |z ka | vs f reference impedance C |z ka | [ ? ] frequency - f [ hz] k k k k k i k =10ma t a =25 k k k k k i k =10ma t a =25
ksd-i5c013-001 7 sg431/sgf431 fig.12 pulse response voltage swing [v] time [ s] output pulse generator f = 100khz gnd 220 ? 50 ? pulse response test circuit input output 0.9v/div 5v/div
ksd-i5c013-001 8 sg431/sgf431 ? typical application vout vcc fig14. shunt regulator ? ? vref r r vout 2 1 1 ? ? r1 r2 vcc vout vin vth=vref vin < vref -> vout=vcc vin > vref -> vout P 2.0v fig15. single-supply comparator with temperature-compensated threshold isink vcc rs isink = vref / r s fig16. constant current sink vcc r cl iout = vref / r cl iout fig17. constant current source vout vcc ? ? vref r r vout 2 1 1 ? ? r1 r2 fig18. series pass regulator vin(min) = vout + vbe vout(min) = vref + vbe vout vcc fig19. high currnet shunt regulator ? ? vref r r vout 2 1 1 ? ? r1 r2
ksd-i5c013-001 9 sg431/sgf431 ? sot-89 outline dimension (unit : mm) re com m e nd pcb solde r la nd [ un it : m m ]
ksd-i5c013-001 10 sg431/sgf431 ? sot-23 outline dimension (unit : mm) re com m e nd pcb solde r la nd [ un it : m m ]
ksd-i5c013-001 11 sg431/sgf431 ? sot-25 outline dimension (unit : mm) re com m e nd pcb solde r la nd [ un it : m m ]
ksd-i5c013-001 12 sg431/sgf431 ? to-92 outline dimension (unit : mm)
ksd-i5c013-001 13 sg431/sgf431 ? to-92m outline dimension (unit : mm)
ksd-i5c013-001 14 sg431/sgf431 the auk corp. products are intended for the use as components in general electronic equipment (office and communication e quipment, measuring equipment, home appliance, etc.). please make sure that you consult with us before you use these auk corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safet y device, etc.). auk corp. cannot accept liability to any damage which may occur in case these auk corp. products were used in the mentioned equi pments without prior consultation with auk corp.. specifications mentioned in this publicati on are subject to change without notice.

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