1 date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation 150ma low dropout voltage regulator spx1121 description features 5.0v and 3.3v output versions 1% output accuracy very low quiescent current low dropout: 300mv @ 150ma very tight load & line regulation very low temperature coefficient current and thermal limiting requires only 1 f for stability equivalent replacement for lt1121 industry standard sot-223 and to-92 3 lead packages ? the spx1121 is a low power voltage regulator. it is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. the spx1121 features very low quiescent current and low dropout voltage (typ. 20mv at 100 a and 300mv at 150ma). a tight initial tolerance (1%), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20 ppm/ c typ.), make the spx1121 useful as a low power voltage reference. 13 2 v out gnd sot-223 package (m3) front view v in spx1121 bottom view 13 2 output gnd input t o-92 (n) + 2.2f + spx1121 i in i g i l 5v in out gnd load i in = i l + i g v out 0.1f figure 1. fixed +5v regulator circuit package pinouots
date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation 2 absolute maximum ratings power dissipation........................................internally limited lead temperature (soldering, 5 seconds) ................260 c storage temperature range........................-65 c to +150 c parameter conditions min. typ. max unit 3.3 v versions output voltage t j =25 c 3.267 3.300 3.333 v 1ma i l 150 ma 3.217 3.300 3.382 5 v versions output voltage t j = 25 c 4.950 5.000 5.050 v 1 ma i l 150 ma 4.880 5.000 5.120 all voltage options output voltage (n ote 1) 20 100 ppm/ c temperature coefficient line regulation (n ote 3) 6v v in 30v (n ote 4) 0.03 0.20 % load regulation (n ote 3) 100 a i l 150 ma 0.04 0.60 % dropout voltage i l = 100 a20mv (n ote 5) i l = 1ma 110 i l = 100 ma 270 i l = 150 ma 300 550 ground current i l = 100 a 100 170 a i l = 1ma 110 i l = 10ma 350 i l = 50ma 1 ma i l = 100 ma 3 6 i l = 150 ma 5 10 current limit v out = 0 230 500 ma thermal regulation 0.05 0.20 %/w output noise, c l = 1 f 430 v rms 10hz to 100khz c l = 200 f 160 v rms electrical characteristics v in =6v, i l =100 a, c l =1 f (n ote 2), t a = 25 c, unless otherwise specified. boldface applies over the full operating temperature ranges. n ote 1: output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. n ote 2: unless otherwise specified all limits guaranteed for t j = 25 c, v in = 6v, i l = 100 a and c l = 1 f. n ote 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. n ote 4: line regulation for the spx1121 is tested at i l = 1ma. for t j = 125 c, line regulation is guaranteed by design. see typical performance characteristics for line regulation versus temperature and load current. n ote 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. operating junction temperature range......-40 c to +125 c input supply voltage...........................................-0.3v to +30v esd rating................................................................2kv min
3 date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation typical performance characteristics input current in p u t c u r r e n t ( a ) 75 0 010 input voltage (volts) r l = 50k ? 25 50 100 125 150 175 200 225 250 123 r l = 8 dropout characteristics o u t p u t vo ltag e (vo lt s) 0 0 input voltage (volts) 123 456 1 2 3 4 5 6 r l =50k ? r l =50k ? 456789 load current (ma) ground current vs. load current g ro u n d p in c u r r e n t (m a ) 10 1 0.1 0.01 0.1 1 10 100 ground current vs. input voltage g ro u n d c u r r e n t ( a ) 320 280 0 input voltage (volts) 240 80 40 0 12345678 120 160 200 i l = 1ma i l = 0 input voltage (volts) input current in p u t c u r r e n t (m a ) 160 150 140 130 70 50 0 120 110 100 90 80 60 40 30 20 10 0 123456 78910 r l =50 ? v out = 5v quiescent current 190 170 150 130 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) q u ie sc e n t c u r r e n t ( a ) v in =6v i l =100ua ground current 8 7 6 0 1 2 345678 input voltage g ro u n d c u r r e n t (m a ) 5 4 3 2 1 0 i l =100ma ground current 6 5 4 3 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) g ro u n d c u r r e n t (m a ) v in = 6v i l = 100ma
date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation 4 typical performance characteristics line transient response time( s) 100 0 200 400 600 800 in pu t o u t pu t v o l t a g e v o l t a g e c h a n g e 4v 6v 8v -50 0 50 ~ ~ mv mv mv c l = 1 f i l = 1ma v out = 5v output impedance 10 0.5 0.1 0.02 10 100 1k 10k 100k 1m frequency (hz) o utput im ped ance (o hm s) 5 0.2 0.05 0.01 1 2 i o = 100ma i o = 100 a i o = 1ma v out = 5v c l = 1 f ripple rejection 90 70 60 40 10 1 10 2 10 3 10 4 10 5 10 6 frequency (hz) r ipple r e jec t io n (db ) 80 50 20 30 i l = 100 a i l = 0 c l = 1 f v in = 6v v out = 5v ripple rejection frequency (hz) r ippl e r e je c t io n (db ) 10 6 10 3 10 2 10 1 90 80 70 60 50 20 40 30 10 4 10 5 i l = 10ma i l = 1ma c l = 1 f v in = 6v v out = 5v drop-out voltage 400 300 40 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) d r o p-o u t v o l t a g e (m v ) 500 200 0 i l = 150ma i l = 100 a ~ ~ drop-out voltage t j = 25? output current d r o p-o u t v o l t a g e (m v ) 100ma 10ma 1ma 100 a 500 400 300 200 100 0 short circuit current sh o r t c ir c u it c u r r en t (m a ) 240 220 200 180 -75 -50 -25 0 25 50 75 100 125 150 temperature (?) 230 210 190 170 20 minimum operating voltage temperature m in im u m o per a t in g v o l t a g e (v ) 2.3 2.1 1.9 1.7 -75 0 75 150 -50 -25 25 50 100 125 ripple rejection r ip p l e r e je c t io n (d b ) 80 60 40 10 10 1 10 3 10 4 10 6 frequency (hz) i l = 50ma i l = 100ma c l = 1f v in = 6v v out = 5v 70 50 30 20 10 2 10 5
5 date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation typical performance characteristics (cont.) line regulation o u t p u t v o l t a g e c h a n g e (m v ) 30 25 20 10 5 input voltage (v) 15 10 5 0 5 0 -5 -10 10 15 20 25 30 ~ ~ i l = 100a i l = 1ma t j = 150 oc t j = 125 oc i l = 100a thermal response p o w e r o u t p u t v o l t a g e d is s ip a t io n (w ) c h a n g e (m v ) 4 2 1 0 time (s) 0 -2 0 -1 10 20 30 40 50 5 1.25w ~ ~ load transient response 80 20 -40 100 04 8121620 time (ms) lo ad output v ol t a ge current change (mv) a 100 -60 -20 0 40 60 a c l = 10 f v out = 5v ~ ~ maxium rated output output current (ma) 120 80 0 010 20 30 input voltage (v) 25 15 5 t a = 85 ? t a =25 ? t jmax = 125 ? 0.25" leads soldered t o-92 package to pc board 100 60 40 20 v out=5v load transient response 250 100 -50 100 01 23 45 time (ms) lo ad output v ol t a ge current change (mv) a ~ ~ ma -100 0 50 150 200 c l = 1 f v out = 5v 100
date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation 6 external capacitors the stability of the spx1121 requires a 1 f or greater capacitor between output and ground. oscillation could occur without this capacitor. most types of tantalum or aluminum electro- lytic works fine here. for operations 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 capacitor. the capacitors value may be in- creased without limit. the spx1121 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 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 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 vrms for a 100khz bandwidth at 5v output. applications hints
7 date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation 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 package: 3 pin sot-223
date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation 8 package: 3 pin to-92 d w l e1 e b a s1 a (2x) e r symbol min nom max a0.17- 0.195 b0. 014 - 0.02 e0.13- 0.155 e0.95- 0.105 e1 0.045 - 0.055 l 0.5 - 0.61 r0. 085 - 0.095 s1 0.045 - 0.06 w0. 016 - 0.022 d0. 175 - 0.195 a4o-6o note: dimensions in (inches) 3 pin to-92
9 date: 11/30/04 spx1121 150ma low dropoutvoltage regulator ? copyright 2004 sipex corporation ordering information part number accuracy output voltage package spx1121n-3.3 ...................... 1% .................... 3.3v ................... 3 lead to-92 spx1121n-3.3/tr ................ 1% .................... 3.3v ................... 3 lead to-92 spx1121n-5.0 ...................... 1% .................... 5.0v ................... 3 lead to-92 spx1121n-5.0/tr ................ 1% .................... 5.0v ................... 3 lead to-92 spx1121m3-3.3 .................... 1% .................... 3.3v ................... 3 lead sot-223 spx1121m3-3.3/tr .............. 1% .................... 3.3v ................... 3 lead sot-223 spx1121m3-5.0 .................... 1% .................... 5.0v ................... 3 lead sot-223 spx1121m3-5.0/tr .............. 1% .................... 5.0v ................... 3 lead sot-223 click here to order samples corporation analog excellence sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 /tr = tape and reel pack quantity is 2500 for or sot-223 and 2,000 for to-92. available in lead free packaging. to order add "-l" suffix to part number. example: spx1121n-3.3/tr = standard; spx1121n-l-3.3/tr = lead free
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