issue 4 - april 2007 1 www.zetex.com ? zetex semiconductors plc 2007 ZTLV431 1.24v cost effective shunt regulator description ordering information the ZTLV431 is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 20ma. the output voltage may be set to any chosen voltage between 1.24 volts and 10 volts by selection of two external divider resistors. the ZTLV431 can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. the ZTLV431 is available as standard as an a grade which has an initial tolerance of 1%; a b grade is planned with an initial tolerance of 0.5%, and all cover the -40c to 125c temperature range as standard. features ? low voltage operation v ref = 1.24v ? temperature range -40 to 125c ? reference voltage tolerance at 25c ? 0.5% ZTLV431b ? 1% ZTLV431a ? typical temperature drift ? 4 mv (0c to 70c) ? 6 mv (-40c to 85c) ? 11mv (-40c to 125c ?100 a minimum cathode current ?0.25 typical output impedance ? adjustable output voltage 1.24v to 10v applications ? opto-coupler linearization ? linear regulators ? improved zener ? variable reference pin connections tol. order code package part mark status (*) notes: (*) for availability of preview status devices contact your local zetex sales representative reel size (inches) tape width (mm) quantity per reel 1% ZTLV431ae5ta sot23-5 s1a preview 7? (180mm) 8 3000 ZTLV431afta sot23 s1a active 7? (180mm) 8 3000 ZTLV431affta sot23f s1a preview 7? (180mm) 8 3000 0.5% ZTLV431be5ta sot23-5 s1b preview 7? (180mm) 8 3000 ZTLV431bfta sot23 s1b preview 7? (180mm) 8 3000 ZTLV431bffta sot23f s1b preview 7? (180mm) 8 3000 1 ref ZTLV431_f (sot23) (top view) cathode 2 3 anode
ZTLV431 issue 4 - april 2007 2 www.zetex.com ? zetex semiconductors plc 2007 absolute maximum ratings operation above the absolute maximum rating may cause device failure. operation at the absolute maximum ratings, for extended periods, may reduce device reliability. unless otherwise stated voltages specified are relative to the anode pin. package thermal data recommended opera ting conditions cathode voltage (v ka ) 10v continuous cathode current (i ka ) -20 to 20ma reference input current range (i ref ) -0.05 to 3ma operating junction temperature -40 to 150c storage temperature -55 to 150c package ja p dis t a =25c sot23-5 250c/w 500 mw sot23 380c/w 330 mw sot23f 160c/w 780 mw min. max. units v ka cathode voltage v ref 10 v i ka cathode current 0.1 15 ma t a operating ambient temperature range -40 125 c
ZTLV431 issue 4 - april 2007 3 www.zetex.com ? zetex semiconductors plc 2007 electrical characteristics (electrical characteristi cs over recommended operating conditions, t a = 25c, k ka = v ref , i ka = 10ma unless otherwise stated) deviation of reference input voltage, v dev , is defined as the maximum variation of the reference input voltage over the full temperature range. the average temperature coefficient of the reference input voltage, v ref is defined as: the dynamic output impedance, z k a, is defined as: when the device is programmed with two externalresistors, r1 and r2, (fig 2) , the dynamic output impedance of the overall circuit, z?, is defined as: symbol parameter conditions min. typ. max. units v ref reference voltage ZTLV431a 1.228 1.24 1.252 v ZTLV431b 1.234 1.24 1.246 t a = -40 to 85c ZTLV431a 1.215 1.265 ZTLV431b 1.224 1.259 t a = -40 to 125c ZTLV431a 1.209 1.271 ZTLV431b 1.221 1.265 v ref(dev) deviation of reference voltage over full temperature range t a = 0 to 70c 4 12 mv t a = -40 to 85c 6 20 t a = -40 to 125c 11 31 ratio of change in reference voltage to the change in cathode voltage v ka from v ref to i ka = 10ma 6v -1.5 -2.7 mv/v 10v -1.5 -2.7 i ref reference input current i ka = 10ma, r 1 = 10k ., r 2 = oc 0.1 0.5 a i ref(dev) i ref deviation over full temperature range i ka = 10ma, r 1 = 10k , r 2 = oc t a = 0 to 70c 0.05 0.3 a t a = -40 to 85c 0.1 0.4 t a = -40 to 125c 0.15 0.5 i kmin minimum cathode current for regulation v ka = v ref t a = -40 to 125c 55 100 a i k(off) off-state current v ka = 10v, v ref =0v 10 30 a z ka dynamic output impedance v ka = v ref , f = <1khz, i k = 0.1 to 15ma 0.25 0.4 v ref v ka ----------------- v max v min t1 t2 v dev =v max -v min temperature v ref ppm c ------------- ? ? ? ? v dev x 1000000 v ref t 1 t 2 ? () ----------------------------------------- - = z ka v k i k ---------- = z z ka x 1 r 1 r 2 ------- + () =
ZTLV431 issue 4 - april 2007 4 www.zetex.com ? zetex semiconductors plc 2007 typical characteristics pin connections - previ ew status devices input input input fig 1 - test circuit for v z = v ref fig 2 - test circuit for v z > v ref fig 3 - test circuit for for off state current ? v z 47nf i z i z i ref i ref v ref v ref r1 r2 i l i l i zoff v z v z 47nf 47nf 1 ref ZTLV431_ff (sot23f) (top view) cathode 2 3 anode preview ZTLV431_e5 (sot23-5) (top view) n/c * cathode * pin 2 should be left floating or connected to pin 5 anode ref 1 2 3 5 4 preview
ZTLV431 issue 4 - april 2007 5 www.zetex.com ? zetex semiconductors plc 2007 package outline - sot23 note: controlling dimensions are in millimeters. ap proximate dimensions are provided in inches dim. millimeters inches dim. millimeters inches min. max. min. max. min. max. max. max. a - 1.12 - 0.044 e1 1.90 nom 0.075 nom a1 0.01 0.10 0.0004 0.004 e 2.10 2.64 0.083 0.104 b 0.30 0.50 0.012 0.020 e1 1.20 1.40 0.047 0.055 c 0.085 0.120 0.003 0.008 l 0.25 0.62 0.018 0.024 d 2.80 3.04 0.110 0.120 l1 0.45 0.62 0.018 0.024 e0.95 nom0.0375 nom----- e e l e1 d a c e1 l1 a1 b 3 leads
ZTLV431 issue 4 - april 2007 6 www.zetex.com ? zetex semiconductors plc 2007 package outline - sot23f note: controlling dimensions are in millimeters. ap proximate dimensions are provided in inches dim. millimeters inches dim. millimeters inches min. max. min. max. min. max. max. max. a 0.80 1.00 0.031 0.0394 e 2.30 2.50 0.0906 0.0984 a1 - 0.10 0.00 0.0043 e1 1.50 1.70 0.0590 0.0669 a2 0.06 0.16 0.0024 0.0006 e2 1.10 1.26 0.0433 0.0496 b 0.39 0.41 0.0153 0.0161 l 0.48 0.68 0.0189 0.0268 c 0.11 0.20 0.0043 0.0079 l1 0.39 0.41 0.0153 0.0161 d 2.80 3.00 0.1102 0.1181 r 0.05 0.15 0.0019 0.0059 e 0.95 ref 0.0374 ref o 0 12 0 12 e1 1.90 ref 0.7480 ref - - - - - d l1 c a1 b r bb e1 e e1 e l a e2
ZTLV431 issue 4 - april 2007 7 www.zetex.com ? zetex semiconductors plc 2007 package outline - sot23-5 note: controlling dimensions are in millimeters. ap proximate dimensions are provided in inches dim millimeters inches min. max. min. max. a 0.90 1.45 0.0354 0.0570 a1 0.00 0.15 0.00 0.0059 a2 0.90 1.30 0.0354 0.0511 b 0.20 0.50 0.0078 0.0196 c 0.09 0.26 0.0035 0.0102 d 2.70 3.10 0.1062 0.1220 e 2.20 3.20 0.0866 0.1181 e1 1.30 1.80 0.0511 0.0708 e 0.95 ref 0.0374 ref e1 1.90 ref 0.0748 ref l 0.10 0.60 0.0039 0.0236 a 0 30 0 30
ZTLV431 issue 4 - april 2007 8 www.zetex.com ? zetex semiconductors plc 2007 definitions product change zetex semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. customers are solely responsible for obtaining th e latest relevant information before placing orders. applications disclaimer the circuits in this design/application note are offered as desi gn ideas. it is the responsibility of the user to ensure that t he circuit is fit for the user?s application and meets with the user?s requirements. no representation or warranty is given and no liability whatsoev er is assumed by zetex with respect to the accuracy or use of such in formation, or infringement of patents or other intellectual prop erty rights arising from such use or otherwise. zetex does not assume any le gal responsibility or will not be held legally liable (whether in contract, tort (including negligence), breach of statutory duty, restricti on or otherwise) for any damages, loss of profit, business, con tract, opportunity or consequential loss in the use of th ese circuit applications, under any circumstances. life support zetex products are specifically not authorized for use as critic al components in life support devices or systems without the ex press written approval of the chief executive officer of zetex semiconductors plc. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body or 2. support or sustain life and whose failure to perform when proper ly used in accordance with instructions for use provided in t he labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support devi ce or system whose failure to pe rform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. reproduction the product specifications contained in this publication are issu ed to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the pr oducts or services concerned. terms and conditions all products are sold subjects to zetex? terms and conditions of sale, and this disclaimer (save in the event of a conflict bet ween the two when the terms of the contract shall prevail) according to region, supplied at the time of order acknowledgement. for the latest information on technology, delivery terms and condi tions and prices, please contact your nearest zetex sales off ice. quality of product zetex is an iso 9001 and ts16949 certified semiconductor manufacturer. to ensure quality of service and products we strongly advise the purchase of parts dire ctly from zetex semiconductors or one of our regionally authorized distributors. for a complete listing of authorized distributors please visit: www.zetex.com/salesnetwork zetex semiconductors does not warrant or accept any liability whatsoever in respect of any parts purchased through unauthorized sales channels. esd (electrostatic discharge) semiconductor devices are susceptible to damage by esd. suitab le precautions should be taken when handling and transporting dev ices. the possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. the extent of damage can vary from immediate functional or parametric malfunc tion to degradation of function or performance in use over ti me. devices suspected of being affected should be replaced. green compliance zetex semiconductors is committed to environ mental excellence in all aspects of its op erations which includes meeting or exceed ing reg- ulatory requirements with respect to the use of hazardous substances. numerous successful programs have been implemented to red uce the use of hazardous substances and/or emissions. all zetex components are compliant with the ro hs directive, and through this it is supporting its customers in their compliance with weee and elv directives. product status key: ?preview? future device intended for production at some point. samples may be available ?active? product status recommended for new designs ?last time buy (ltb)? device will be discontinued and last time buy period and delivery is in effect ?not recommended for new designs? device is still in production to support existing designs and production ?obsolete? production ha s been discontinued datasheet status key: ?draft version? this term denotes a very early datasheet ver sion and contains highly provisional information, which may change in any manner without notice. ?provisional version? this term denotes a pre-release datasheet. it provides a clear indication of anticipated performance. however, changes to the test conditions and specif ications may occur, at any time and without notice. ?issue? this term denotes an issued datasheet cont aining finalized specifications. however, changes to specifications may occur, at any time and without notice. zetex sales offices europe zetex gmbh kustermann-park balanstra?e 59 d-81541 mnchen germany telefon: (49) 89 45 49 49 0 fax: (49) 89 45 49 49 49 europe.sales@zetex.com americas zetex inc 700 veterans memorial highway hauppauge, ny 11788 usa telephone: (1) 631 360 2222 fax: (1) 631 360 8222 usa.sales@zetex.com asia pacific zetex (asia ltd) 3701-04 metroplaza tower 1 hing fong road, kwai fong hong kong telephone: (852) 26100 611 fax: (852) 24250 494 asia.sales@zetex.com corporate headquarters zetex semiconductors plc zetex technology park, chadderton oldham, ol9 9ll united kingdom telephone: (44) 161 622 4444 fax: (44) 161 622 4446 hq@zetex.com ? 2007 published by zetex semiconductors plc
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