1 date: 11/29/04 spx1129 400ma low dropout voltage regulator ?opyright 2004 sipex corporation spx1129 description features 1% output accuracy 3.3v, 5v, at 500ma output very low quiescent current 0.42v dropout voltage at 400ma extremely tight load and line regulation current & thermal limiting reverse battery protection equivalent replacement for lt1129 appplications power supply communications equipment computers and peripherals the spx1129 is a low power voltage regulator. this device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. the spx1129 features very low quiescent current and very low dropout voltage of 0.42 volts. this includes a tight initial tolerance of 1% max, and a very low output temperature coefficient, making the spx1129 useful as a low- power voltage reference. the spx1129 is offered in a sot-223, to-220, to-252 & to-263 3 lead packages. 400ma low dropout voltage regulator + 2.2f + spx1129 i in i g i l 5v in out gnd load i in = i l + i g v in 0.1f fixed +5v regulator circuit.. typical application circuit gnd v out v in 3 2 1 spx1129 3 pin to-220 123 spx1129 3 pin to-263 gnd v in v out v out gnd v in to- 252 3 2 1 spx1129 123 spx1129 3 pin to-263 gnd v in v out now available in lead free packaging
2 date: 11/29/04 spx1129 400ma low dropout voltage regulator copyright 2004 sipex corporation power dissipation ........................................................ internally limited lead temp. (soldering, 5 seconds) ............................................. 260 c storage temperature range ........................................ -65 c to +150 c operating junction temperature range ....................... -40 c to +125 c electrical characteristics electrical characteristics at v in = 6v, i o = 1ma, c out = 2.2 f, t a = 25 c, unless otherwise specified. boldface applies over the full operating temperature range. parameter conditions typ min max units (note 2) 3.3v version o utput voltage 3.3 3.267 3.333 v 1ma i l 400ma 3.3 3.217 3.382 r everse output current v out = 3.3v, v in = 0v 16 25 a 5.0v version output voltage 5.0 4.950 5.050 v 1ma i l 400ma 5.0 4.880 5.120 r everse output current v out = 5.0v, v in = 0v 16 25 a all voltage options output voltage 20 100 ppm/ c temperature coefficient (note1) line regulation 6v v in 20v (note 4) 1.5 10 mv load regulation (note 3) i l =1 to 400ma 6 20 mv 30 dropout voltage (note 5) i l =1ma 0.13 0.17 v 0.25 i l =400ma 0.42 0.55 0.70 ground current i l =1ma 100 200 a i l =10ma 350 500 i l =50ma 1.5 3 ma i l =100ma 26 i l =400ma 725 current limit v out =0 330 800 ma ripple rejection v in -v out =1v(avg) ,5850 db v ripple =0.5vp-p, f ripple =120hz, i load =400ma, t j = 25 c input reverse leakage current v in = -20v, v out =0v 1.0 ma note 1: output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. note 2: unless otherwise specified all limits are guaranteed for t j = 25 c, v in = 6v, i l = 1ma and c l = 2.2 f. note 3: regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. changes in output voltage due to heating effects are covered under the specification for thermal regulation. note 4: line regulation for the spx1129 is tested at 25 c for i l = 1 ma. for t j = 125 c, line regulation is guaranteed by design. note 5: dropout voltage is defined as the input to output differential at which the output voltage drops 100 mv below its nominal value measured at 1v differential. input supply voltage ....................................................... -20v to +20v esd rating .............................................................................. 2kv min absolute maximum ratings
3 date: 11/29/04 spx1129 400ma low dropout voltage regulator ?opyright 2004 sipex corporation external capacitors the stability of the spx1129 requires a 2.2 f or greater capacitor between output and ground. oscillation could occur without this capacitor. most types of tantalum or aluminum electrolytic works fine here. for operations of below -25 c solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30 c. the esr of about 5 ? or less and resonant frequency above 500khz are the most important parameters in the value of the capaci- tor. the capacitor value can be increased with- out limit. the spx1129, unlike other low dropout regula- tors will remain stable and in regulation with no load in addition to the internal voltage divider. this feature is especially important in applica- tions like cmos ram keep-alive. if there is more than 10 inches of wire between the input and the ac filter capacitor, or if a battery is used as the input, then a 0.1 f tanta- lum or aluminum electrolytic capacitor should be placed from the input to the ground. reducing output noise it may be an advantage to reduce the ac noise present at the output. one way is to reduce the regulator bandwidth by increasing the size of the output capacitor. increasing the capacitor from 1 f to 220 f decreases the noise from 430 v to 160 v rms for a 100khz bandwidth at 5v output. application information
4 date: 11/29/04 spx1129 400ma low dropout voltage regulator copyright 2004 sipex corporation package: 3 pin to-263 e d l1 b2 e b 123 c c2 a h seating plane l 0?8 see view c e/2 vi ew c gauge plane a1 seating plane c with plating base metal b section b-b b b symbol min nom max a0.16- 0.19 a1 0 - 0.01 b0.02- 0.039 c0. 015 - 0.029 d0.33- 0.28 d1 0.27 - - e0.38- 0.42 e1 0.245 - - e h0. 575 - 0.625 l0.07- 0.11 l1 - - 0.066 l2 - - 0.07 l3 note: dimensions in (mm) 3 pin to-263 jedec to-263 (aa) variation .100 bsc .010 bsc
5 date: 11/29/04 spx1129 400ma low dropout voltage regulator ?opyright 2004 sipex corporation package: 3 pin to-220 h1 b seating plane a1 a chamfer optional c a2 a a c with plating base metal b contact area e ? q d d1 e2 e/2 l l1 c c d d b 1 e e1 e symbol min nom max a 1.4 - 0.19 a1 0.02 - 0.055 a2 0.08 - 0.115 b 0.015 0.027 0.04 b2 0.045 - 0.07 c 0.014 - 0.024 d 0.56 - 0.65 d1 0.33 - 0.355 d2 0.48 - 0.507 e 0.38 - 0.42 e1 0.27 - 0.35 e2 - - 0.03 e e1 h1 0.23 - 0.27 l1 - - 0.25 l2 --- ?p 0.139 - 0.161 q 0.1 - 0.135 note: dimensions in (mm) 3 pin to-220 jedec to-220 (ab) variation .100 bsc .100 bsc
6 date: 11/29/04 spx1129 400ma low dropout voltage regulator copyright 2004 sipex corporation package: 3 pin to-252 e1 e1/2 d1 c with plating base metal b contact area seating plane a1 (l1) l c c gauge plane l2 c symbol min nom max a1 - - 0.005 c 0.018 - 0.024 d1 0.205 - - e1 0.17 - - h 0.37 - 0.41 l 0.055 0.06 0.07 l1 l2 note: dimensions in (mm) .020 bsc 3 pin to-252 jedec to-252 (aa) variation .108 ref
7 date: 11/29/04 spx1129 400ma low dropout voltage regulator ?opyright 2004 sipex corporation package: 3 pin sot-223 symbol min nom max a-- 1.8 a1 0.02 - 0.1 a2 1.5 1.6 1.7 b 0.66 0.76 0.84 b2 2.9 3 3.1 c 0.23 0.3 0.35 d 6.3 6.5 6.7 e 6.7 7 7.3 e1 3.3 3.5 3.7 e e1 l 0.75 - - ?0o- 10o note: dimensions in (mm) 2.30 basic 4.60 basic 3 pin sot-223 jedec to-261 (aa) variation b2 c section c-c gauge plane seating plane h a a1 l 0 c with plating base metal section b-b b c c see detail a e d 1 e e1 c c n b b b2 b
8 date: 11/29/04 spx1129 400ma low dropout voltage regulator copyright 2004 sipex corporation corporation analog excellence sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability aris ing out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 ordering information part number accuracy temperature output voltage packages spx1129m3-3.3 ................ 1% ........................ -40 c to 125 c ................... 3.3v ................... 3-pin sot-223 spx1129m3-3.3/tr ........... 1% ........................ -40 c to 125 c ................... 3.3v ................... 3-pin sot-223 spx1129m3-5.0 ................ 1% ........................ -40 c to 125 c ................... 5.0v ................... 3-pin sot-223 spx1129m3-5.0/tr ........... 1% ........................ -40 c to 125 c ................... 5.0v ................... 3-pin sot-223 spx1129r-3.3 ................... 1% ........................ -40 c to 125 c ................... 3.3v ..................... 3-pin to-252 spx1129r-3.3/tr ............. 1% ........................ -40 c to 125 c ................... 3.3v ..................... 3-pin to-252 spx1129r-5.0 ................... 1% ........................ -40 c to 125 c ................... 5.0v ..................... 3-pin to-252 spx1129r-5.0/tr ............. 1% ........................ -40 c to 125 c ................... 5.0v ..................... 3-pin to-252 spx1129t3-3.3 ................. 1% ........................ -40 c to 125 c ................... 3.3v ..................... 3-pin to-263 spx1129t3-3.3/tr ........... 1% ........................ -40 c to 125 c ................... 3.3v ..................... 3-pin to-263 spx1129t3-5.0 ................. 1% ........................ -40 c to 125 c ................... 5.0v ..................... 3-pin to-263 spx1129t3-5.0/tr ........... 1% ........................ -40 c to 125 c ................... 5.0v ..................... 3-pin to-263 spx1129u-3.3 ................... 1% ........................ -40 c to 125 c ................... 3.3v ..................... 3-pin to-220 spx1129u-5.0 ................... 1% ........................ -40 c to 125 c ................... 5.0v ..................... 3-pin to-220 available in lead free packaging. to order add "-l" suffix to part number. example: spx1129t3-5.0/tr = standard; spx1129t3-l-5.0/tr = lead free /tr = tape and reel pack quantity is 500 for to-263, 2,000 for to-252 and 2,500 for sot-223. click here to order samples
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