NJM2800 preliminary low dropout voltage regulator with reset general discription package outline the NJM2800 is a low dropout voltage regulator with reset function. it provides up to 1 50ma of logic supply, and the reset function monitors either input or output voltage of the regulator with 2% accuracy. it is suitable for local power supply and reset for small micro controller and other logic chips. features ? output voltage accuracy vo = 2.2 % ? reset voltage accuracy vreset = 2.0 % ? reset hold time td = 1 0ms 2.5ms ? quiescent current i q = 300 a (max.) ? open collector output ? bipolar technology ? input voltage monitor type ? package outline sot89 (5pin) / mtp5 ? protection circuit 1 .current limit circuit 2.thermal overload protection circuit output voltage/reset validated voltage part no output voltage reset validated voltage NJM2800-2528 2.5v 2.8v NJM2800-3342 3.3v 4.2v block diaglam NJM2800f** NJM2800u** pin configuration 1 .v out 2.gnd 3.cd 4.v or 5.v in 1 5 2 3 4 1 .v in 2.gnd 3.v or 4.c d 5.v out ( mtp-5 ) ( sot-89 ) v o gnd v in thermal protection bandgap reference cd v or 5 4 1 2 3
NJM2800 preliminary absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in + 1 4 v 200 (mtp5) power dissipation p d 350 (sot-89) mw operating temperature topr ? 40 +85 c storage temperature ts t g ? 40 + 1 25 c electrical characteristics (v in =vo+ 1 v , c in =0. 1 f, c o = 1 f ( ( ( ( vo 2.6v: co=2.2 f ) ) ) ) ta=25 c ) parameter symbol condition min. typ. max. unit quiescent current i q io=0ma ? 250 350 a regulator block output voltage vo io=30ma ? 2.2% ? +2.2% v output current io vo-0.3v 1 50 200 ? ma line regulation ? vo/ ? v in v in =vo+ 1 v vo+6v, io=30ma ? ? 0. 1 0 %/v load regulation ? vo/ ? io io=0 1 00ma ? ? 0.03 %/ma dropout voltage ? v i_o io=60ma ? 0. 1 0 0. 1 8 v ripple rejection rr ein=200mvrms, f= 1 khz, io= 1 0ma,vo=3v ? 60 ? db output voltage tem p erature coefficient ? vo/ ? t ta=0 85 c , io= 1 0ma ? 50 ? ppm/ c output noise voltage v no f= 1 0hz 1 00khz, io= 1 0ma, vo=3v ? 45 ? vrms reset block voltage detection v rt v in =h l ? 2% ? +2% v hysteresis voltage v rth v in =h l h vrt 3vrt 5vrt 8 mv low level output r orl v in =v rt -0.5v, r l = 1 00k ? ? 1 00 300 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 ti t d v in =(v rt -0.5v) (v rt +0.5v), c d =0. 1 f 9 1 0 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 individual specification for a specific output voltage.
NJM2800 preliminary timing chart v rt v o v o v or v o v in v rt h 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.
NJM2800 preliminary test circuit typical applications NJM2800 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 NJM2800 v in v o cd v or gnd v out 1 00k ? 1 .0 f 0. 1 f 0. 1 f v in v or the specifications on this data book are only given for information, without any guarantee as regards eithe r mistakes or omissions. the application circuit in this dat a book are described only to show representative usages o f the product and not intended for the guarantee o r permission of any right including the industrial rights.
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