njm2804 -1- ver.2004-12-24 low dropout voltage regulator with reset ? general discription ? package outline the njm2804 is a low dropout voltage regulator with reset function. it provides up to 300ma of logic supply, and the reset function monitors input voltage of the regulator with 1% accuracy. it is suitable for local power supply and reset for small micro controller and other logic chips. ? features z output voltage accuracy vo 1.0% z reset voltage accuracy v rt 1.0% z adjust reset delay time with external capacitor. z ripple rejection 75db typ. (f =1khz,vo=3v version) z input voltage monitor type z open collector output z internal short circuit current limit z internal thermal overload protection z bipolar technology z package outline sot-89 -5 ? output voltage/ detection voltage device name v out v det njm2804u/u1-2528 2.5v 2.8v njm2804u/u1-3342 3.3v 4.2v ? equivalent circuit v out gnd v in thermal protection bandgap reference cd v o r ? pin configuration njm2804u1 pin function 1.v out 2.gnd 3.cd 4.v or 5.v in njm2804u1 123 4 52
njm2804 - 2 - ver.2004-12-24 ? absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +14 v power dissipation p d 350 mw operating temperature topr - 40 +85 c storage temperature tstg - 40 +125 c ? electrical characteristics (v in =vo+1v, c in =0.1 f, co=1.0 f ( co=2.2 f: vo 2.6v ) ta = 2 5 c) parameter symbol test condition min. typ. max. unit quiescent current i q v in =vo+2v, io=0ma - 250 350 a regulator block output voltage vo io=30ma -1.0% - +1.0% v output current io vo-0.3v 300 400 - ma line regulation ? vo/ ? v in v in =vo+1v vo+6v, io=30ma - - 0.10 %/v load regulation ? vo/ ? io io=0 300ma - - 0.03 %/ma dropout voltage ? v i_o io=100ma - 0.10 0.18 v ripple rejection rr ein=200mvrms, f=1khz, io=10ma, vo=3v version - 75 - db output voltage temperature coefficient ? vo/ ? t ta =0 85 c, io=10ma - 50 - ppm/ c output noise voltage v no f=10hz 80khz, io=10ma, vo=3v version - 45 - vrms reset block voltage detection v rt v in =h l -1.0% - +1.0% v hysteresis voltage v rth v in =h l h vrt 3 % vrt 5 % vrt 8 % v low level output voltage r orl v in =v rt -0.5v, r l =100k ? - 100 300 mv output leak current i orh v in = v rt +0.5v - - 0.1 a on time output current i orl v in =v rt -0.5v, r l =0 ? 5 - - ma reset output delay time t d v in =(v rt -0.5v) (v rt +0.5v), c d =0.1 f 9 10 11 ms operation voltage limit v opl v orl =0.4v - 0.9 - v the above specification is a common specification for all output voltages. therefore, it may be different from the individual specification for a specific output voltage.
njm2804 - 3 - ver.2004-12-24 ? timing chart v rt v o v o v o r [v] v o [v] v in [v] v rth t d t t t t d t d ? v or is the case where a pull-up is carried out to v in through resistance.
njm2804 - 4 - ver.2004-12-24 ? test circuit ? typical applications njm2804 v in v o cd v or gnd v out i out v r l 1. 0 v 0.1 f 0.1 f v in i q v or i or njm2804 v in v o cd v or gnd v out 100k ? 1. 0 f 0.1 f v in v or *1 vo 2.6v: co=2.2f (ceramic) *2 vo 2.6v: co=2.2f (ceramic)
njm2804 - 5 - ver.2004-12-24 [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
|
