low dropout, negative output voltage regulator features low dropout voltage (typically 120mv at 50ma; 380mv at 100ma) for ?.0v output part tight output voltage tolerance ( 2%, max) low supply current (3.5 a, typ) factory-programmed output voltages of ?.1v to ?.0v in 100mv increments space-saving 3-pin sot-23a package typical applications cellular phones battery operated systems palmtops portable cameras general description the tc59 is a low dropout, negative output voltage regulator designed specifically for battery-operated sys- tems. its full cmos construction eliminates the wasted ground current typical of bipolar ldos. this reduced supply current significantly extends battery life, particularly when the tc59 is operated in dropout. other tc59 key features include low supply current (typically 3.0 a) and low dropout operation (typically 120mv at 50ma). factory-programmed output voltages of ?.1v to ?.0v in 100mv steps are available. the tc59 is packaged in a tiny 3-pin sot-23a package. tc59 pin configuration tc59-2 11/5/99 part code tc59 30 02 ecb xx tc59 50 02 ecb xx ordering information v ss v out 3-pin sot-23a* note: *3-pin sot-23a is equivalent to eiaj sc59 tc59 1 2 3 v in output voltage: ex: 50 = ?.0v; 30 = ?.0v max output tolerance: ex: 02 = 2%; 01 = 1% package/temperature ?0 c to 85 c 3-pin sot-23a package taping direction: tr = standard rt = reverse *other voltages are available. please contact microchip technology inc. for details. typical application v in 1 f 1 f v out v out tc59 1 2 3 v in v ss ?2001 microchip technology inc. ds21438a
2 low dropout, negative output voltage regulator tc59 tc59-2 11/5/99 ?2001 microchip technology inc. ds21438a pin description pin number name description 1v out regulated voltage output 2v in supply voltage input 3v ss ground absolute maximum ratings* input voltage (v in ) .................................................... ?2v output current (i out ) .............................................200ma output voltage (v out ) .............. ? dd ?0.3v to v in + 0.3v power dissipation (pd) ..........................................150mw operating ambient temperature (t opr ) .. ?0 c to +85 c storage temperature (t stg ) .................. ?0 c to +125 c electrical characteristics: v in = v r ?1.0v; note 1; c l = 10 f; t a = +25 c, unless otherwise specified. symbol parameter test conditions min typ max unit v in supply voltage i out = 20ma ?0 v i dd supply current 3 7 a i out(max) maximum output current v in = ?.0v; v r = ?.0v, v out ?.5v 100 ma v in = ?.0v; v r = ?.0v, v out ?.6v 80 ma v in = ?.0v; v r = ?.0v, v out ?.7v 60 ma v out output voltage i out = 20ma 1.02 x v r 0.98 x v r v tc v out output voltage i out = 20ma 100 ppm/ c temperature coefficient ? v out / line regulation i out = 20ma; v r = ?.0v; ?.0 |