lp2950/2951 linearintegratedcircuit 1 100 ma low-dropout voltage regulator description the contek lp2950/2951 is a monolithic integrated voltage regulator with low dropout voltage, and low quiescent current. it includes many features that suitable for different applications. available in 3-pin to-92, dip-8 and sop-8 packages. features *high accuracy 3.0, 3.3, or 5v fixed output for to-92 package. *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 error flag available for dip and sop package. *output voltage programmable for dip and sop package. applications *battery powered equipment. *high efficient linear regulator down to 1.24v. *cellular phones. to-92 sop-8 dip-8 1 ordering information part number temperature range package accuracy contek lp2950-3.0 -40 ~ +125 c 3-pin to-92 plastic 1.0% contek lp2950-3.3 -40 ~ +125 c 3-pin to-92 plastic 2.0% contek lp2950 -40 ~ +125 c 3-pin to-92 plastic 1.0% contek lp2951f -40 ~ +125 c 8-pin sop-8 plastic 2.0% contek lp2951p -40 ~ +125 c 8-pin dip-8 plastic 2.0% contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lp2950/2951 linearintegratedcircuit 2 pin configurations 1 2 3 4 8 7 6 5 input feedback 5v tap shutdown sense output contek lp2951 gnd error 2 13 output gnd input contek lp2950 to-92 plastic package bottom view sop-8 or dip-8 package fig. 1 block diagram 5 4 6 2 1 8 7 3 60mv 330k tocmos orttl 5v150ma max. feedback input output sense 5v tap gnd error detection comparator error amplifier from cmos orttl 1.23 ref shut down unragulated dc error 182k 60k 1.5 f absolute maximum ratings parameter symbol value unit supply voltage vcc -0.3~+30 v feedback voltage vfeedback -1.5~+30 v shutdown voltage vshutdown -0.3~+30 v comparator output voltage vco -0.3~+30 v storage temperature tstr -65~+150 c operating junction temperature tj -40~+125 c contek contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lp2950/2951 linearintegratedcircuit 3 electrical characteristics ( tested at tj=25 c,v in =6v,i l =100a and c l =1f.unless otherwise specified) parameter part number test condition min. typ. max. unit output voltage contek lp2950-3.0 contek lp2950-3.3 contek lp2950 contek lp2951 t j =25 c (note 1) 2.97 3.26 4.90 3.0 3.3 5.0 3.03 3.37 5.10 v contek lp2950-3.0 contek lp2950-3.3 contek lp2950 contek lp2951 -25 c<=t j<= <=+85 c (note 1) 2.97 3.26 4.90 3.0 3.3 5.0 3.03 3.37 5.10 v output voltage contek lp2950-3.0 contek lp2950-3.3 contek lp2950 contek lp2951 100 a<=i l <=100 ma tj<=tj(max) (note 1) 2.97 3.26 4.90 3.0 3.3 5.0 3.03 3.37 5.10 v output voltage temperature coefficient 20 100 ppm/ c line regulation 6v<=v in <=30v 0.03 0.1 0.2 % load regulation 100a<=i l <=100 ma 0.04 0.1 0.2 % dropout voltage i l =100 a i l =100ma (note 2) 50 380 80 450 150 600 mv ground current i l =100 a i l =100ma 75 8 120 12 140 14 a ma dropout ground current v in =4.5v,i l =100 a 110 170 200 a current limit vout=0 160 200 220 ma output noise 10hz to 100khz c l =1 f c l =200 f c l =3.3 f (bypass=0.01 f pins 7 to ( contek 2951) 430 160 100 v for 8-pin version only reference voltage 1.22 1.235 1.25 v reference voltage (note 7) 1.19 1.27 v feedback pin bias current 20 40 na reference voltage temperature coefficient 50 ppm/ c feedback bias current temperature coefficient 0.1 na/ c error comparator output leakage current v oh =30v 1 a output low voltage v in =4.5v i ol =400 a 250 mv upper threshold voltage (note 3) 3.2 %v o contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lp2950/2951 linearintegratedcircuit 4 parameter part number test condition min. typ. max. unit lower threshold voltage (note 3) 7.6 %v o hysteresis (note 3) 15 mv shutdown input input logic voltage low(regulator on) high(regulator off) 2.0 1.3 0.70 v shutdown pin input current v shutdown =2.4v 30 50 a v shutdown =30v 450 600 a regulator output current shutdown vshutdown>=2v,v in <=30v, v out =0, feedback pin tied to 5v tap. 310 a note 1: additional conditions for 8-pin versions are feedback tied to 5v tap an output tied to output sense (v out =5v) and vshutdown<=0.8v. note 2:dropout voltage is defined as the input to output differential at which the output voltage drops 100mv below its nominal value measured at 1v differential. note 3:comparator thresholds are expressed in terms of percentage value of voltage output. application circuit (10 ampere low dropout regulator) +v in fb vout gnd sd error contek lp2951 8 5 7 1 4 3 current limit section +v in =v ou t+0.5v 0.05 470 w 680 w 4.7m w 20k w 220 w 0.033 m f 47w r1 r2 4.7 m f 100 m f 1% 10k w 2n3906 + v out 100m a vout=1.23v*(1+r1/r2) for 5v output use internal resistors.wire pin 6 to 7 and wire pin 2 to +v out contek d65h0 fig.2 contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lp2950/2951 linearintegratedcircuit 5 contek lp2950-3.0 contek lp2950-3.3 contek lp2950-5.0 vin vout fig. 3 typical performance characteristics 1 2 34 56 0 0 1 2 3 4 5 6 fig.4dropout characteristics input voltage(v) output vol tage(v) r l =50k r l =50 01 234 5678 9101112 0 10 20 30 40 50 60 70 80 90 100 120 110 130 140 150 fig.5 input current input current(ma) input voltage(v) r l =50 50 60 70 80 90 100 110 120 -75 -50 -25 0 25 50 75 100125 150 fig.7ground pincurrent quiescent current( a) temperature(c) v in =6v i l =100 a -75 -50 -25 0 25 50 75 100125 150 4 5 6 7 8 temperature( c) fig.8 ground pincurrent quiescent current(ma) v in =6v i l =100ma -75 -50 -25 0 25 50 75 100125 150 100 110 120 130 140 150 160 170 temperature(c) short circuit current(ma) fig.10short circuit current -75 -50 -25 0 25 50 75 100125 150 0 50 100 300 400 500 600 temperature( c) dropout vol tage(mv) fig.6dropout voltage i l =100ma i l =100 a -75 -50 -25 0 25 50 75 100125 150 temperature( c) 0.6 0.8 1.0 1.2 1.4 1.6 1.8 fig.9shutdown threshold voltage shutdown threshold v oltage(v) 0.1 1 10 100 0 100 200 300 400 500 fig.11dropout voltage output current(ma) dropout v oltage(mv) * contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
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