lm2954 linear integrated circuit 1 300 ma low-dropout voltage regulator description the contek lm2954 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, 3.7 or 5v fixed output for to-92, dip-8 and sop-8 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. to-92 sop-8 dip-8 1 applications *battery powered equipment. *high efficient linear regulator down to 1.24v. *cellular phones. ordering information part number temperature range package accuracy contek lm2954-3.0 -40 c ~ +125 c 3-pin to-92 plastic 1.0% contek lm2954-3.3 -40 c ~ +125 c 3-pin to-92 plastic 1.0% contek lm2954 -40 c ~ +125 c 3-pin to-92 plastic 1.0% contek LM2954F -40 c ~ +125 c 8-pin sop-8 plastic 1.0% contek lm2954p -40 c ~ +125 c 8-pin dip-8 plastic 1.0% pin configurations 1 2 3 4 8 7 6 5 input feedback 5v tap shutdown sense output contek lm2954 gnd error 2 13 output gnd input contek lm2954 to-92 plastic package bottom view sop-8 or dip-8 package fig. 1 contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lm2954 linear integrated circuit 2 block diagram 5 4 6 2 1 8 7 3 60mv 330k tocmos or ttl 5v150ma max. feedback input output sense 5vtap 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 electrical characteristics ( tested at tj=25 c,v in =6v,i l =100 a and c l =1f.unless otherwise specified) parameter part number test conditions min. typ. max. unit output voltage contek lm2954-3.0 contek lm2954-3.3 contek lm2954-3.7 contek lm2954 contek lm2954 t j =25 c (note 1) 2.97 3.27 3.66 4.95 3.0 3.3 3.7 5.0 3.03 3.33 3.74 5.05 v contek lm2954-3.0 contek lm2954-3.3 contek lm2954-3.7 contek lm2954 contek lm2954 -25 c<=t j <=+85 c (note 1) 2.94 3.23 3.63 4.9 3.0 3.3 3.7 5.0 3.06 3.36 3.77 5.1 v contek lm2954-3.0 contek lm2954-3.3 contek lm2954-3.7 contek lm2954 contek lm2954 100 a<=i l <=300 ma tj<=tj(max) (note 1) 2.94 3.23 3.66 4.9 3.0 3.3 3.7 5.0 3.06 3.36 3.74 5.1 v output voltage temperature coefficient 20 100 ppm/ c line regulation 6v<=v in <=30v 0.1 0.2 % contek contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lm2954 linear integrated circuit 3 parameter part number test conditions min. typ. max. unit load regulation 100 a<=i l <=300 ma 0.2 0.5 % dropout voltage i l =100ma i l =200ma (note 2) 50 380 80 450 150 600 mv ground current i l =100 a i l =200ma 0.75 8 0.12 12 0.14 14 ma dropout ground current v in =4.5v,i l =100 a 110 170 200 a current limit vout=0 300 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 2954 ) 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 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. contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lm2954 linear integrated circuit 4 application circuit 5 4 6 2 1 8 7 3 60mv 330k to cmos or ttl 3.7v 350ma feedback input output sense 3.7v gnd error detection comparator error amplifier from cmos or ttl 1.23 ref shut down unragulated dc error 1.5 f 10a low dropout regulator +v in fb vout gnd sd error contek lm2954 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 10 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 contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
lm2954 linear integrated circuit 5 contek lm2954-3.0 contek lm2954-3.3 contek lm2954-3.7 contek lm2954-5.0 vin vout 1 f 1 f fig. 3 contek contek microelectronics co.,ltd. http://www.contek-ic.com e-mail:sales@contek-ic.com
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