600ma cmos l.d.o. regulator lm8805 aug. 2010 - rev. 1.5.1 - 1 - htc sot-23 5l pkg sot-89 3l pkg ordering information device package lm8805sf5-xx sot-23-5l lm8805f-xx sot-89 xx = output voltage = adj, 1.2v, 2.5v, 3.3v features z maximum output current : 600ma z highly accurate: output voltage 1.5% z stability with low esr capacitors z low power consumption z on-chip protections: thermal, short circuit z small input/output differential: 600mv at 600ma z adjustable version application z battery-operated systems z portable computers z portable cameras and video recorders z reference voltage sources z instrumentation z pagers descripsion the lm8805 series is a low-dropout linear regulator. there are devices designed specifically for battery- operated systems. ground curr ent is very small (50ua- typ), that significantly ext ending battery life. low power consumption and high accuracy is achieved through cmos and programmable fuse technologies. output voltage: 1.5v to 6.0v. sot-23-5l(300mw) and sot-89(500mw) packages are available. absolute maximum ratings characteristic symbol min. max. unit input voltage v in - 8 v output current i out - 1 a output voltage v out v ss -0.3 v in +0.3 v storage temperature range t stg -40 125 operating ambient temperature t a -40 125
600ma cmos l.d.o. regulator lm8805 aug. 2010 - rev. 1.5.1 - 2 - htc ordering information v out package order no. description supplied as status adj sot-23 5l lm8805sf5-adj 600ma, enable, adjustable reel active sot-23 5l lm8805sf5-1.2v 600ma, fixed reel contact us 1.2 v sot-89 3l lm8805f-1.2v 600ma, fixed reel contact us sot-23 5l lm8805sf5-2.5v 600ma, fixed reel active 2.5 v sot-89 3l lm8805f-2.5v 600ma, fixed reel active sot-23 5l lm8805sf5-3.3v 600ma, fixed reel active 3.3 v sot-89 3l lm8805f-3.3v 600ma, fixed reel active package type root name product code lm 8805 output voltage : adj / 1.2v / 2.5v / 3.3v sf5 f : sot-23 5l : sot-89 { pin configuration vout byp/adj vin gnd en gnd vin vout sot-23 5l sot-89 3l pin description sot-23 5l sot-89 3l pin no. name function name function 1 v in input supply gnd ground 2 gnd ground v in input supply 3 en enable v out output voltage 4 byp/adj bypass for fixed output or output adjust for adjustable output - - 5 v out output voltage - - 5 4 1 2 3 1 2 3
600ma cmos l.d.o. regulator lm8805 aug. 2010 - rev. 1.5.1 - 3 - htc typical application typical 3 pin application circuit lm8805-x.x c in vin vout gnd vin vout c out typical 5 pin application circuit - output adjustment (adjustable version) lm8805-adj c in vin en vout adj gnd vin vout r1 r2 c out v out = v adj (1+r2/r1) - fixed voltage application lm8805-x.x c in vin en vout byp* gnd vin vout c out c byp (optional) * note) byp pin can be left open if low noise operation is not required.
600ma cmos l.d.o. regulator lm8805 aug. 2010 - rev. 1.5.1 - 4 - htc electrical characteristics (at t a =25 , v in = v out (nominal) + 1v, unless otherwise noted) parameter symbol test condit ion min. typ. max. unit output voltage accuracy v o i o = 1ma i o = 1 to 600ma -1.5 -3 +1.5 +2 % adjustable voltage v adj i o = 1ma i o = 1 to 600ma 1.251 1.232 1.27 1.289 1.295 v line regulation v line i o = 1ma, (v out +1v) 2.8v, i o =600ma 600 1000 2.0v < v out 2.8v, i o =600ma 900 1400 dropout voltage v drop v out 2.0v, i o =600ma 1300 1900 mv maximum output current i o(max) v out > 0.96*vrating 600 ma current limit i cl 1300 ma en exit delay c bp = 0uf, c out = 1uf i o = 100ma 600 usec en input bias current v en = gnd 100 na en input low current v en = v in -1 -0.3 ua en supply current v en = v in 0.01 1 ua en input threshold low v il v in = 2.5 to 5.5v 0.4 v en input threshold high v ih v in = 2.5 to 5.5v 2 v ground pin current i gnd i out = 0ma to 600ma 50 85 ua thermal shutdown temperature t sd i out = 10ma 155 thermal shutdown hysterisis t sd i out = 10ma 10 v o temperature coefficient i out = 10ma 30 ppm power supply ripple rejection psrr i out = 100ma, c out = 2.2uf, f = 100hz 55 db note 1. load regulation is measured usi ng pulse techniques with duty cycle < 5% operating characteristics t.b.d application information detailed description the lm8805 consists of a high-precision voltage referenc e, an error correction circuit, and a current limited output driver. with good transient re sponses, output remains stable ev en during load changes. the shdn input enables the output to be turned off, resulting in reduced power consumption. the lm8805 incorporates both over-tem perature and over-current protection.
600ma cmos l.d.o. regulator lm8805 aug. 2010 - rev. 1.5.1 - 5 - htc external capacitors the lm8805 can stable work with cheap mlcc output capacitor. the lm8805 having high ripple rejection ratios, the series can be used with power supply noise. a 470pf capacitor from the bypass input to ground reduces noise present on the internal reference, which in turn significantly reduces output noise. if output noise is not a concern, this input may be left unconnected. larger capacitor values cbp be used, but results in a longer time period to rated output voltage when power is initially applied.
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