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? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 1 ? description the ACE431S is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. the output voltage can be set to any value between vref (approximately 2.5 v) to 18v with two external resi stors. this device has a typical output impedance of 0.08 . active output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for zener diodes in many applications. the ACE431S is characterized for operation from -40oc to 85oc, and five package options (sot-23-3, sot-23-5, sop-8, to-92 and sot-89-3) allow the designer the opportunity to select the proper package for their applications. features low voltage operation (2.5v) adjustable output voltage v 0 =v ref to 18v wide operating current range 150 a to 80ma low dynamic output impedance 0.08 ? (typ) trimmed bandgap design up to +0.5% esd rating is 6kv (per mil-std-883d) rohs compliant and 100% lead (pb)-free application linear regulators adjustable supplies switching power supplies battery operated computers instrumentation computer disk drives absolute maximum ratings parameter symbol max unit cathode voltage v ka 18 v continuous cathode current i ka 80 ma reference current i ref 1 ma operating junction temperature range t j -40 to 85 o c storage temperature range t stg -65 to 150 o c sot-89-3 120 sot-23-3 230 sot-23-5 230 sop-8 150 thermal resistance ja to-92 220 o c/w
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 2 packaging type sop-8 sot-23-3 sot-23-3(a) sot-89-3 3 3 1 8 2 7 3 6 4 5 1 2 1 2 1 2 3 sot-23-5 to-92 5 4 3 2 1 1 2 3 pin sop-8 sot-23-3 sot-23-3(a) sot-89-3 sot-23-5 to-92 cathode 1 2 1 3 3 3 anode 2.3.6.7 3 3 2 5 2 nc 4.5 1.2 ref 8 1 2 1 4 1 ordering information selection guide ACE431S x x x + h bm : sot-23-3 bma : sot-23-3(a) bn : sot-23-5 am : sot-89-3 ep : to-92 fm : sop-8 pb-free reference voltage accuracy : a : 0.5% b : 1% c : 2% halogen-free
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 3 block diagram symbol diagram electrical characteristics t a =25 unless otherwise specified. parameter test circuit symbol conditions min typ max units 0.5% 2483 2495 2507 1% 2470 2495 2520 reference voltage 2% 1 v ref v ka =v ref , i ka =10ma 2445 2495 2545 mv deviation of reference voltage over full temperature range 1 v i(dev) v ka =v ref , i ka =10ma t a =-40 to 85 -14 mv ration of change in reference voltage to the change in cathode voltage 2 i v ref / v ka i i ka =3 ma, v ka =10v- v ref 0.2 2.7 mv/v minimum cathode current for regulation 1 i min v ka =v ref 0.15 0.3 a dynamic impedance 1 z ka v ka =v ref , i ka =1 to 80ma, f Q 1.0khz 0.08 0.7 ? reference current 2 i ref i k a =10ma, 0.3 4 a
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 4 r1=10k ? , r2= deviation of reference current over full temperature range 2 i i(dev) i ka =10ma, r1=10k ? , r2= , t a =-40 to 85 -0.13 a off-state cathode current 3 i off v ka =18v, v ref =0 0.4 1.0 a typical circuit test circuit 1: v ka =v ref test circuit 2: v ka >v ref test circuit 3: off state current
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 5 application diagram typical performance characteristics cathode current vs. cathode voltage cathode current vs. cathode voltage cathode voltage (v) cathode voltage (v) ACE431S
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 6 reference voltage vs. junction temperature stability boundry conditions junction temperature ( ) load capacitance /pf thermal consideration package power rating (t a =25 ) power rating (t a =50 ) power rating (t a =70 ) sot-23-3 ( ja =230 /w) 435mw 326mw 239mw sot-23-5 ( ja =230 /w) 435mw 326mw 239mw to-92 ( ja =220 /w) 455mw 341mw 250mw 1. maximum junction temperature is 125 2. ja is measured with packages mounted onboard unde r still-air condition with 1w power applied. 3. power rating is calculated using p d =(t j -t a )/ ja , where t j denotes junction temperature and t a denotes ambient temperature.
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 7 packing information to-92
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 8 packing information sot-23-3
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 9 packing information sot-23-5
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 10 packing information sot-89-3
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 11 packing information sop-8
? ??????????????????????????????????????????????????????????????? ?????????????????????? ACE431S ??????????????????????? technology adjustable precision shunt regulator ver 1.2 12 notes ace does not assume any responsibility for use as cr itical components in life support devices or systems without the express written approval of the president and general counsel of ace electronics co., ltd. as sued herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ace technology co., ltd. http://www.ace-ele.com/

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