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| 2013/03/13 ver.4 page 2 sp 431 high voltage adjustable precision shunt regulators description applications the sp431 is high-voltage three- terminal adjustable voltage references, with specified thermal stability over applicable industrial and commercial temperature ranges. output voltage can be set to any value between v ref (2.5 v) and 36v with two external re sistors. these devices have a typical output impedance of 0.25 ? . active output circuitry provides a very sharp turn- on characteristic, making the sp431 excellent replacements for low- voltage zener diodes in many applications, including onboard regulation and adjustable power supplies. battery power equipment linear regulators switch power supply cellular phone digital cameras computer disk drivers instrumentation features pin configuration low output noise adjustable output voltage, v o = vref to 36 v low operational cathode current 0.25 ? typical output impedance ( sot-23 ) ( sot-89 ) ( to-92 ) part marking ( sot-23 ) ( sot-89 ) ( to-92 )
2013/03/13 ver.4 page 3 sp 431 high voltage adjustable precision shunt regulators pin description: sp431as23rgb/sp431bs23rgb/ sp431as 89rgb/ sp431bs89rgb pin symbol description 1 r ref 2 c cathode 3 a anode pin description: SP431AT92AGB/sp431bt92agb pin symbol description 1 r ref 2 a anode 3 c cathode pin description: sp431cas23rgb/sp431cbs23rgb pin symbol description 1 c cathode 2 r ref 3 a anode ordering information part number voltage tolerance package part marking sp431as23rgb 0.5% sot-23 31ayw sp431bs23rgb 1.0% sot-23 31byw sp431as89rgb 0.5% sot-89 sp431a sp431bs89rgb 1.0% sot-89 sp431b sp431cas23rgb 0.5% sot-23 31cayw sp431cbs23rgb 1.0% sot-23 31cbyw SP431AT92AGB 0.5% to-92 sp431a sp431bt92agb 1.0% to-92 sp431b week code : a ~ z ( 1 ~ 26 ) ; a ~ z ( 27 ~ 52 ) sp431as23rgb/sp431bs23rgb : tape reel ; pb C free; halogen C free sp431as89rgb/sp431bs89rgb : tape reel ; pb C free; halogen C free sp431cas23rgb/sp431cbs23rgb : tape reel ; pb C free ; halogen C free SP431AT92AGB/sp431bt92agb : tape ammo ; pb C free; halogen C free block diagram 2013/03/13 ver.4 page 4 sp 431 high voltage adjustable precision shunt regulators absoulte maximum ratings (t a =25 unless otherwise specified) parameter symbol value unit cathode voltage v z 37 v continuous cathode current i z 150 ma reference current i ref 10 ma operation junction temperature range t j -40 ~ +150 storage temperature range t stg -65 ~ +150 lead temperature range (soldering 10sec.) t sol 260 thermal resistance ? ja 140 /w the ic has a protection circuit against static elec tricity. do not apply high static electricity or hi gh voltage that exceeds the performance of the protection circuit t o the ic. electrical characteristics (t a =25 , unless otherwise specified) parameter symbol conditions min. typ. max. unit reference voltage v ref v z = v ref i z = 10ma sp431as23rgb sp431as89rgb sp431cas23rgb SP431AT92AGB 2.482 2.495 2.508 v sp431bs23rgb sp431bs89rgb sp431cbs23rgb sp431bt92agb 2.47 2.495 2.52 reference voltage v ref v z = v ref i z = 1ma sp431as23rgb sp431as89rgb sp431cas23rgb SP431AT92AGB 2.482 2.495 2.508 v sp431bs23rgb sp431bs89rgb sp431cbs23rgb sp431bt92agb 2.47 2.495 2.52 vref temp deviation v dev t a =-40 ~+80 v z = v ref , i z = 10ma 10 25 mv ratio of change in vref to change in cathode voltage ? v ref / ? v z i z = 10ma ? v z = 36v ~ v ref -1.4 -2.7 mv / v reference input current i ref r 1 =10k ? , r 2 = , i z = 10ma 2 4 ua iref temp deviation i ref(dev) t a =-40 ~+80 r 1 =10k ? , r2 = , i z = 10ma 0.8 2.5 ua off state cathode current i z(off) v ref = 0v v z = 36v 0.1 0.5 ua 2013/03/13 ver.4 page 5 sp 431 high voltage adjustable precision shunt regulators dynamic output impedance r z f < 1khz , v z = v ref i z = 1ma ~ 100ma 0.25 0.5 ? minimum operation current i z(min) v z = v ref 0.4 0.7 ma testing circuit 2013/03/13 ver.4 page 6 sp 431 high voltage adjustable precision shunt regulators application circuit shunt regulator single-supply comparator with temperature-compensat ed threshold precision high-current series regulator 2013/03/13 ver.4 page 7 sp 431 high voltage adjustable precision shunt regulators application circuit output control of a three-terminal fixed regulator high-current shunt regulator precision 5-v 1.5-a regulator 2013/03/13 ver.4 page 8 sp 431 high voltage adjustable precision shunt regulators application circuit pwm converter with reference voltage monitor delay timer 2013/03/13 ver.4 page 9 sp 431 high voltage adjustable precision shunt regulators performance characteristics 2013/03/13 ver.4 page 10 sp 431 high voltage adjustable precision shunt regulators performance characteristics 2013/03/13 ver.4 page 11 sp 431 high voltage adjustable precision shunt regulators performance characteristics 2013/03/13 ver.4 page 12 sp 431 high voltage adjustable precision shunt regulators sot-23 package outline 2013/03/13 ver.4 page 13 sp 431 high voltage adjustable precision shunt regulators sot-89 package outline 2013/03/13 ver.4 page 14 sp 431 high voltage adjustable precision shunt regulators to-92 package outline 2013/03/13 ver.4 page 15 sp 431 high voltage adjustable precision shunt regulators information provided is alleged to be exact and con sistent. sync power corporation presumes no respon sibility for the penalties of use of such information or for any vio lation of patents or other rights of third parties which may result from its use. no license is granted by allegation or otherwise un der any patent or patent rights of sync power corpo ration. conditions mentioned in this publication are subject to change without notice. this publication surpasses and re places all information previously supplied. sync power corporation produc ts are not authorized for use as critical component s in life support devices or systems without express written approval of sync power corporation. ?the sync power logo is a registered trademark of s ync power corporation ?2004 sync power corporation C printed in taiwan C all rights reserved sync power corporation 7f-2, no.3-1, park street nankang district (nksp), taipei, taiwan 115 phone: 886-2-2655-8178 fax: 886-2-2655-8468 ?http://www.syncpower.com |
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