unisonic technologies co., ltd lp2950/2951 linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2008 unisonic technologies co., ltd qw-r102-001.l 100 ma low-dropout voltage regulator ? description the utc lp2950/2951 are monolithic integrated voltage regulators with low dropout voltage, and low quiescent current. it includes many features that su itable for different applications. ? features * fixed output versions, 2.5v, 3v, 3.3v, 3.6v and 5v, are available. * high accuracy output voltage. * extremely low quiescent current and dropout voltage. * extremely tight load and line regulation. * current and thermal limiting. * very low temperature coefficient. * logic controlled shutdown and err flog available for 8 pin package. * output voltage progr ammable for lp2951. to-92 sop-8 dip-8 1 1 to-252 lead-free: lp2950l-xx/lp2951l halogen-free: lp2950g-xx/lp2951g ? ordering information ordering number normal lead free halogen free package packing lp2950-xx-d08-t lp2950l-xx-d08- t lp2950g-xx-d08-t dip-8 tube lp2950-xx-s08-t lp2950l-xx-s08- t lp2950g-xx-s08-t sop-8 tube lp2950-xx-s08-r lp2950l-xx-s08-r lp 2950g-xx-s08-r sop-8 tape reel lp2950-xx-t92-b lp2950l-xx-t92-b lp 2950g-xx-t92-b to-92 tape box lp2950-xx-t92-k lp2950l-xx-t92-k lp2950g-xx-t92-k to-92 bulk lp2950-xx-tn3-t lp2950l-xx-tn3-t lp2950g-xx-tn3-t to-252 tube lp2950-xx-tn3-r lp2950l-xx-tn3-r lp2950g-xx-tn3-r to-252 tape reel lp2951-d08-t lp2951l-d08-t lp2951g-d08-t dip-8 tube lp2951-s08-t lp2951l-s08-t lp2951g-s08-t sop-8 tube lp2951-s08-r lp2951l-s08-r lp 2951g-s08-r sop-8 tape reel note: pin assignment: i:v in o:v out g:gnd ? output voltage code(for lp2950) output voltage code 2.5v 25 3.0v 30 3.3v 33 3.6v 36 5.0v 50
lp2950/2951 linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r102-001.l ? pin configurations 2 1 3 output gnd input to-92 plastic package bottom view utc lp2950 input gnd output sot-252 package 1 2 3 4 8 7 6 5 input feedback 5v tap shutdown sense output utc lp2951 gnd error sop-8 or dip-8 package for utc lp2951 1 2 3 4 8 7 6 5 input nc nc shutdown nc output utc lp2950 gnd error sop-8 or dip-8 package for utc lp2950 utc lp2950 ? block diagram 5 4 6 2 1 8 7 3 60mv 330k to cmos or ttl 5v 150ma max. feedback input output sense 5v tap gnd error detection comparator error amplifier from cmos or ttl 1.23 ref shut down unregulated dc error 182k 60k 1.5 f for utc lp2951
lp2950/2951 linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r102-001.l ? absolute maximum ratings parameter symbol ratings unit supply voltage v cc -0.3 ~ +30 v feedback voltage v fb -1.5 ~ +30 v shutdown voltage v shdn -0.3 ~ +30 v power dissipation p d internally limited w operation junction temperature t j -40 ~ +125 c storage temperature t stg -65 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? thermal data parameter symbol rating unit to-92 160 to-252 92 sop-8 180 junction-to-ambient dip-8 ja 105 c/w to-92 83 to-252 6 junction-to-case sop-8 jc 45 c/w ? electrical characteristics (t j =25 c, v in =6v, i l =100 a, c l =1 f, unless otherwise specified.) for all version: parameter symbol test condition min typ max unit t j =25 c (note 1) v out 0.98 v out v out 1.02 v output voltage v out -25 c Q t j Q +85 c(note 1) v out 0.98 v out v out 1.02 v output voltage v out 100 a Q i l Q 100ma, t j Q t j (max) v out 0.98 v out v out 1.02 v output voltage temperature coefficient tcvo 20 100 ppm/ c line regulation v out 6v Q v in Q 30v 0.03 0.1 0.2 % load regulation v out 100 a Q i l Q 100 ma 0.04 0.1 0.2 % i l =100 a 50 80 150 dropout voltage v d i l =100ma (note 2) 380 450 600 mv i l =100 a 75 120 140 a ground current i g i l =100ma 8 12 14 ma dropout ground current v in =4.5v,i l =100 a 110 170 200 a current limit i limit v out =0 160 200 220 ma c l =1 f 430 c l =200 f 160 output noise (10hz ~ 100khz) (bypass=0.01 f pins 7 to 1 (lp2951)) en c l =3.3 f 100 v
lp2950/2951 linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r102-001.l ? electrical characteristics(cont.) for utc lp2951 8-pin version only parameter symbol test condition min typ max unit reference voltage v ref 1.22 1.235 1.25 v reference voltage v ref over temperature(note 4) 1.19 1.27 v feedback pin bias current i fb 20 40 na reference voltage temperature coefficient v ref(tc) 50 ppm/ c feedback bias current temperature coefficient i fb(tc) 0.1 na/ c error comparator output leakage current i o(leak) v oh =30v 1 a output low voltage v ol v in =4.5v, i ol =400 a 250 mv upper v thu (note 3) 3.2 %vo threshold voltage lower v thl (note 3) 7.6 %vo hysteresis v hys (note 3) 15 mv shutdown input low v il regulator on 1.3 0.70 input logic voltage high v ih regulator off 2.0 v v shdn =2.4v 30 50 a shutdown pin input current i shdn v shdn =30v 450 600 a regulator output current shutdown i dff v shdn R 2v, v in Q 30v, v out =0 feedback pin tied to 5v tap. 3 10 a note: 1. 2. 3. 4. additional conditions for 8-pin versions are fb pin tied to 5v tap , output tied to sense (v out =5v) and v shdn 0.8v . dropout voltage is defined as the i nput to output differential at whic h the output voltage drops 100mv belo w its nominal value measured at 1v differential. comparator thresholds are expressed in te rms of percentage value of voltage output. v ref v out (v in -1v), 2.3v v in 30v, 100 a i l 100ma, t j t j(max)
lp2950/2951 linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r102-001.l ? typical application circuit 10 ampere low dropout regulator +v in fb vout gnd sd error utc lp2951 8 5 7 1 4 3 current limit section +v in =v ou t+0.5v 0.05 470 680 4.7m 20k 220 0.033 f 47 r1 r2 4.7 f 100 f 1% 10k 2n3906 + v out 100m a v out =1.23v*(1+r1/r2) for 5v output use internal resistors.wire pin 6 to 7 and wire pin 2 to +v out utc d65h0 fig.1 utc lp2950-2.5 utc lp2950-3.0 utc lp2950-3.3 utc lp2950-3.6 utc lp2950-5.0 v in v out fig.2
lp2950/2951 linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r102-001.l ? typical characteristics
lp2950/2951 linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r102-001.l ? typical characteristics(cont.) utc assumes no responsibilit y for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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