issue 2 - june 2006 1 www.zetex.com ? zetex semiconductors plc 2006 ztlv431 1.24v cost effective shunt regulator description the ztlv431 is a three terminal ad justable shunt re gulator 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 impr ovement 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 ordering information tol. order code package part mark status (*) notes: (*) for availability of preview status devices contact your local zetex sales representative reel size tape width (mm) quantity per reel 1% ztlv431ae5ta sot23-5 s1a preview 7? (180mm) 8 3,000 ztlv431afta sot23 s1a active 7? (180mm) 8 3,000 ztlv431affta sot23f s1a preview 7? (180mm) 8 3,000 0.5% ZTLV431BE5TA sot23-5 s1b preview 7? (180mm) 8 3,000 ztlv431bfta sot23 s1b preview 7? (180mm) 8 3,000 ztlv431bffta sot23f s1b preview 7? (180mm) 8 3,000 1 ref ztlv431_f (sot23) (top view) pin connections cathode 2 3 anode 1 ref ztlv431_ff (sot23f) (top view) cathode 2 3 anode preview ztlv431_e5 (sot23-5) (top view) n/c n/c cathode anode ref 1 2 3 5 4 preview
ztlv431 issue 2 - june 2006 2 www.zetex.com ? zetex semiconductors plc 2006 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 2 - june 2006 3 www.zetex.com ? zetex semiconductors plc 2006 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 2 - june 2006 4 www.zetex.com ? zetex semiconductors plc 2006 typical characteristics 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
ztlv431 issue 2 - june 2006 5 www.zetex.com ? zetex semiconductors plc 2006 intentionally left blank
ztlv431 issue 2 - june 2006 6 www.zetex.com ? zetex semiconductors plc 2006 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 2.67 3.05 0.105 0.120 h 0.33 0.51 0.013 0.020 b 1.20 1.40 0.047 0.055 k 0.01 0.10 0.0004 0.004 c - 1.10 - 0.043 l 2.10 2.50 0.083 0.0985 d 0.37 0.53 0.015 0.021 m 0.45 0.64 0.018 0.025 f 0.085 0.15 0.0034 0.0059 n 0.95 nom 0.0375 nom g 1.90 nom 0.075 nom - - - - - l n h g a c f b m k d 3 leads
ztlv431 issue 2 - june 2006 7 www.zetex.com ? zetex semiconductors plc 2006 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 a2 b r bb e1 e e1 e l a e2
ztlv431 issue 2 - june 2006 8 www.zetex.com ? zetex semiconductors plc 2006 for international sales offices visit www.zetex.com/offices zetex products are distributed worldwide. for details, see www.zetex.com/salesnetwork this publication is issued to provide outline information only whic h (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contact or be regarded as a representation relating to the products or services concerned. the company reserves the right to alter without notice the specif ication, design, price or conditions of supply of any product or service. europe zetex gmbh streitfeldstra?e 19 d-81673 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 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
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