1 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation spx1521 features 1% output accuracy 3.3v, 5v, at 300ma output very low quiescent current 0.3v (typ.) dropout voltage at 300ma extremely tight load and line regulation current & thermal limiting reverse battery protection equivalent replacement for lt1521 the spx1521 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 spx1521 features very low quiescent current and very low dropout voltage. this includes a tight initial tolerance of 1% max, and very low output temperature coef?cient, making the spx1521 useful as a low-power voltage reference. the spx1521 is offered in 3 pin to-252, sot-223, to-220 & to-263 packages. 300ma low dropout voltage regulator now available in lead free packaging description + 2.2f + spx1521 i in i g i l 5v in out gnd load i in = i l + i g v out 0.1f typical applications circuit 1 2 3 spx1521 3 pin to -263 gnd v in v out
2 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation power dissipation ........................................................ internally limited lead temp. (soldering, 5 seconds) .............................................. 260c storage temperature range ......................................... -65c to +150c operating junction temperature range ...................... -40c to +125c input supply voltage .................................................. -20v to +20v absolute maximum ratings parameter conditions typ min max units (note 2) 3.3v version o utput voltage 3.3 3.267 3.333 v 1 m a i l 300 ma 3.3 3.217 3.382 r everse output current v out = 3.3v, v in = 0v 16 25 a 5.0v v ersion output voltage 5.0 4.950 5.050 v 1 m a i l 300 ma 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 coef?cient (note1) line regulation 6v v in 20v (note 4) 1.5 20 mv load regulation (note 3) i l =1 to 300ma 4 20 mv 30 dropout voltage (note 5) i l =1ma 0.13 0.17 v 0.25 i l =300ma 0.30 0.55 0.70 ground current i l =1ma 100 150 a i l =10ma 350 500 i l =50ma 1.5 3 ma i l =100ma 2 6 i l =300ma 5 14 current limit v out =0 330 500 ma ripple rejection v in -v out =1v(avg), 58 50 db v ripple =0.5vp-p, f ripple =120hz, i load =150ma input reverse leakage current v in = -20v, v out =0v 1.0 ma note 1: output or reference voltage temperature coef?cients de?ned as the worst case voltage change divided by the total temperature range. note 2: unless otherwise speci?ed all limits are guaranteed for t j = 25c, v in = 6v, i l = 1ma and c l = 2.2f. 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 speci?cation for thermal regulation. note 4: line regulation for the spx1521 is tested at 25c for i l = 1 ma. for t j = 125c, line regulation is guaranteed by design. note 5: dropout voltage is de?ned as the input to output differential at which the output voltage drops 100 mv below its nominal value measured at 1v differential. shutdown input voltage .................................................. -0.6v to +6.5v esd rating ................................................................................ 2kv min electrical characteristics electrical characteristics at v in = 6v, i o = 1ma, c out = 2.2f, t a = 25c, unless otherwise speci?ed. boldface applies over the full operating temperature range.
3 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation external capacitors the stability of the spx1521 requires a 2.2f or greater capacitor between output and ground. oscillation could occur without this capacitor. most types of tantalum or aluminum electrolytic works ?ne here. for operations of below -25c solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30c. the esr of about 5 or less and resonant frequency above 500khz are the most important parameters in the value of the capacitor. the capacitor value can be increased without limit. the spx1521, unlike other low dropout regulators will remain stable and in regulation with no load in addition to the internal voltage divider. this feature is especially important in applications like cmos ram keep-alive. if there is more than 10 inches of wire be - tween the input and the ac ?lter capacitor, or if a battery is used as the input, then a 0.1f tantalum 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 re - duce the regulator bandwidth by increasing the size of the output capacitor. increasing the capacitor from 1f to 220f only de - creases the noise from 430v to 160vrms for a 100khz bandwidth at 5v output. application information top view spx1521 1 3 2 sot-223 (m3) top view to-263-3 (t ) 1 spx1521 2 3 front view to-220-3 (u ) spx1521 1 2 3 front view to-252 (r ) 3 2 1 v in gnd v out v out gnd v in v out gnd v in v out gnd v in pinouts note: tab is connected to gnd thermal resistance (theta ja) sot-223 ------62.3oc/w to-262 ------31.4oc/w to-220 ------29.4oc/w
4 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation min nom max min nom max a 0.160 - 0.190 4.06 - 4.83 a1 0.000 - 0.010 0.00 - 0.25 b 0.020 - 0.039 0.51 - 0.99 b2 0.045 - 0.070 1.14 - 1.78 c 0.015 - 0.029 0.38 - 0.74 c2 0.045 - 0.065 1.14 - 1.65 d 0.330 - 0.380 8.38 - 9.65 d1 0.270 - - 6.86 - - e 0.380 - 0.420 9.65 - 10.67 e1 0.245 - - 6.22 - - e h 0.575 - 0.625 14.61 - 15.88 l 0.070 - 0.110 1.78 - 2.79 l1 - - 0.066 - - 1.68 l3 o 0? - 8? 0? - 8? inches controlling dimension millimeters conversion factor: 1 inch = 25.40 mm sipex pkg signoff date/rev: jl aug5-05 / rev a 0.25 bsc .010 bsc symbol 3 pin to-263 jedec to-263 variation aa 2.54 bsc .100 bsc detail c l gauge plane a1 seating plane l3 c c2 a h seating plane chamfer optional side view see detail c e1 d1 (l1) thermal pad back view l1 front view e d b2 e b e/2 1 2 3 package: 3 pin to-263
5 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation min nom max min nom max a 0.140 - 0.190 3.56 - 4.83 a1 0.020 - 0.055 0.51 - 1.27 a2 0.080 - 0.115 2.03 - 2.79 b 0.015 0.027 0.040 0.25 0.51 1.02 b2 0.045 0.057 0.070 1.14 1.45 1.78 c 0.014 - 0.024 0.25 - 0.51 d 0.560 - 0.650 14.22 - 16.51 d1 0.330 - 0.355 8.38 - 8.89 d2 0.480 - 0.507 12.19 - 12.70 e 0.380 - 0.420 9.65 - 10.67 e1 0.270 - 0.350 6.86 - 8.89 e2 - - 0.030 - - 0.76 e e1 h1 0.230 - 0.270 5.84 - 6.86 l 0.500 - 0.580 12.70 - 14.73 l1 - - 0.250 - - 6.35 p 0.139 - 0.161 3.30 - 4.06 q 0.100 - 0.135 2.54 - 3.30 sipex pkg signoff date/rev: jl aug4-05 / rev a 3 pin to-220 jedec to-220 variation ab symbol 2.54 bsc 5.08 bsc dimensions in inches: controlling dimension dimensions in millimeters: conversion factor: 1 inch = 25.40 mm .100 bsc .200 bsc d2 (h1) e1 thermal pad back view e1 b2 e ?p q d d1 e2 l l1 b 1 e front view h1 seating plane a1 a chamfer optional c a2 side view package: 3 pin to-220
6 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation front view b3 e d l3 1 2 3 l4 e b2 b l5 back view e1 d1 h (l1) seating plane c c2 a side view gauge plane l l2 1 a1 min nom max min nom max a 0.086 - 0.094 2.18 - 2.39 a1 - - 0.005 - - 0.13 b 0.025 - 0.035 0.64 - 0.89 b2 0.030 - 0.045 0.76 - 1.14 b3 0.195 - 0.215 4.95 - 5.46 c 0.018 - 0.024 0.46 - 0.61 c2 0.018 - 0.035 0.46 - 0.89 d 0.235 0.240 0.245 5.97 6.10 6.22 d1 0.205 - - 5.21 - - e 0.250 - 0.265 6.35 - 6.73 e1 0.170 - - 4.32 - - e h 0.370 - 0.410 9.4 - 10.41 l 0.055 0.060 0.070 1.4 1.52 1.78 l1 l2 l3 0.035 - 0.050 0.89 - 1.27 l4 - - 0.040 - - 1.02 l5 0.045 - 0.060 1.14 - 1.52 ? 0o - 10o 0o - 10o ?1 0o - 15o 0o - 15o 0.51 bsc 2.74 ref 2.29 bsc symbol 3 pin to-252 jedec to-252 variation aa sipex pkg signoff date/rev: jl aug4-05/rev a .090 bsc .108 ref .020 bsc dimensions in inches: controlling dimension dimensions in millimeters conversion factor: 1 inch = 25.40 mm package: 3 pin to-252
7 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation package: 3 pin sot223 e d 1 e e1 b2 b top view 22 3 e1 front view l gauge plane seating plane l2 c ? a1 a2 a symbol min nom max min nom max a - - 1.80 - - 0.071 a1 0.02 - 0.10 0.001 - 0.004 a2 1.50 1.60 1.70 0.060 0.063 0.067 b 0.66 0.76 0.84 0.026 0.030 0.033 b2 2.90 3.00 3.10 0.114 0.118 0.122 c 0.23 0.30 0.35 0.010 0.012 0.014 d 6.30 6.50 6.70 0.248 0.256 0.264 e 6.70 7.00 7.30 0.264 0.276 0.287 e1 3.30 3.50 3.70 0.130 0.138 0.146 e e1 l 0.75 - - 0.030 - - l2 ? 0o - 10o 0o - 10o 0.091 basic 0.182 basic 0.010 basic 3 pin sot-223 jedec to-261 variation aa sipex pkg signoff date/rev: jl aug8-05/rev a millimeters controlling dimension inches conversion factor: 1 inch = 25.40 mm 0.25 basic 2.30 basic 4.60 basic
8 date: 2/6/06 spx1521 300ma low dropout voltage regulator ? copyright 2006 sipex corporation solved by sipex ? sipex corporation res - tion or use q sipex corporation headquarters and sales of?ce 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 ordering information part number accuracy output voltage package spx1521m3-3-3 1% 3.3v 3-pin sot-223 spx1521m3-3-3/tr 1% 3.3v 3-pin sot-223 spx1521m3-5-0 1% 5.0v 3-pin sot-223 spx1521m3-5-0/tr 1% 5.0v 3-pin sot-223 spx1521r-3-3 1% 3.3v 3-pin to-252 spx1521r-3-3/tr 1% 3.3v 3-pin to-252 spx1521r-5-0 1% 5.0v 3-pin to-252 spx1521r-5-0/tr 1% 5.0v 3-pin to-252 spx 1521 t-3-3 1% 3.3v 3-p in to-263 spx 1521 t-3-3 /tr 1% 3.3v 3-p in to-263 spx1521t-5-0 1% 5.0v 3-pin to-263 spx1521t-5-0/tr 1% 5.0v 3-pin to-263 spx 1521 u-3-3 1% 3.3v 3-p in to-220 spx1521u-5-0 1% 5.0v 3-pin to-220 available in lead free packaging. to order add "-l" suf?x to part number. example: spx1521t-3-3/tr = standard; spx1521t-l-3-3/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.
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