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technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A description: the smc431, TL431A and tl431 are 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the a pplicable extended comme rcial temperature range. the output voltage may be set at any level greater than 2.495v (vref) up to 30v merely by selecting two external resistors that act as a voltage divider network. these devices have a typical output impedance of 0.08 ? . active output circuitry provides a very sharp turn-on characteristic, making these devices excellent improved replacements for zener diodes in many applications. the precise 0.5% reference voltage tolerance of the smc431 makes it possible in many applications to avoid the use of a variable resistor, consequently saving cost and eliminating drift and reliability problems associated with it. features: ? precision reference voltage. smc431 : 2.495v 0.5% TL431A : 2.495v 1.0% tl431 : 2.495v 1.6% ? sink current capability: 200ma. ? minimum cathode current for regulation: 250 a. ? equivalent full-range temperature coefficient: 50 ppm/ . ? fast turn-on response. ? low dynamic output impedance: 0.08 ? . ? adjustable output voltage. ? low output noise. ? space saving packages: sot-23 applications: ? linear regulators. ? adjustable supplies. ? switching power supplies. ? battery operated computers. ? instrumentation. ? computer disk drivers. typical application circuit:
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A ordering information: smc431 -xxx smc431- xxx TL431A - xxx marking diagram: absolute maximum ratings: cathode voltage.........????????? ???????????? ?????????? ?.30v continuous cathode current?????????.... ..................??????..?? -10ma~250ma reference input current rang e?????????????? ??...............???...............10ma operating temperature range ...?????..???????????????.? ?40c to 85c storage temperature range ???????????????????????..?65c ~ 150c maximum junction temperature ?????????????????????????..125c lead temperature (soldering) 10 sec. ???????????????????????260c absolute maximum ratings are those values beyond which the life of a device may be impaired. pin configuration sot-23 top view 1: vref 2: cathode 3: anode part no. marking smc431fta ac1sg tl431fta ac2sg TL431Afta ac3sg packing type tb: tube tr: taping & reel ta: bag packaging type f: sot-23
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A test circuit fig. 1 test circuit for v z =v ref fig. 2 test circuit for v z >v ref fig. 3 test circuit for off-state current
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A electrical characteristics (t a =25 c, unless otherwise specified.) (note 1)
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A typical performance characteristics
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A block diagram symbol pin descriptions cathode pin - sinks current with a range from 250 a to 200ma for normal applications. vref pin - providing v ref =2.495v (typ.) for adjustable output voltage. anode pin - anode pin sources current for normal application. the current value is the same as cathode pin.
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A application examples
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A application examples (continued)
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A physical dimensions sot-23 (unit: mm) note: 1. refer to jedec mo-178. 2. dimension "d" does not include mold flas h, protrusions or gate burrs. mold fl ash, protrusion or gate burrs shall not exceed 10 mil per side. 3. dimension "e1" does not include inter-lead flash or protrusions. 4. controlling dimension is millim eter, converted inch dimensi ons are not necessarily exact.
technical data adjustable precision shunt regulator data sheet n1595 rev. - ? china - germany - korea - singapore - united states ? ? http://www.smc-diodes.com - sales@ smc-diodes.com ? smc431 tl431 TL431A disclaimer: 1- the information given herein, including the specifications and dimensions, is subject to change without prior notice to impr ove product characteristics. before ordering, purchasers are advised to contact the smc - sangdest microelectronics (nanjing) co., ltd sale s department for the latest version of the datasheet(s). 2- in cases where extremely high reliability is required (suc h as use in nuclear power control, aerospace and aviation, traffic equipment, medical equipment , and safety equipment) , safety should be ensur ed by using semiconductor devices that feature assured safety or by means of users? fail-safe precautions or other arrangement . 3- in no event shall smc - sangdest microelectronics (nanjing) c o., ltd be liable for any damages that may result from an accid ent or any other cause during operation of the user?s units according to the datasheet(s). smc - sangdest microelectronics (nanjing) c o., ltd assumes no responsibility for any intellectual property claims or any other problems that may result from applications of infor mation, products or circuits described in the datasheets. 4- in no event shall smc - sangdest microelectronics (nanjing) c o., ltd be liable for any failure in a semiconductor device or any secondary damage resulting from use at a value exceeding the absolute maximum rating. 5- no license is granted by the datasheet(s) under any patents or other rights of any third party or smc - sangdest microelectr onics (nanjing) co., ltd. 6- the datasheet(s) may not be reproduced or duplicated, in any form, in whole or part, without the expressed written permissio n of smc - sangdest microelectronics (nanjing) co., ltd. 7- the products (technologies) described in the datasheet(s) are not to be provided to any party whose purpose in their applica tion will hinder maintenance of international peace and safety nor are they to be applied to that purpose by their direct purchasers or a ny third party. when exporting these products (technologies), the necessary procedures are to be taken in accordance with related laws a nd regulations..

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