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NJM2845/46 -1- ver.2005-01-20 low dropout voltage regulator general description package outline the NJM2845 is low dropout voltage regulator. advanced bipolar technology achieves low noise, high ripple rejection and low quiescent current. NJM2845 is 3 terminal type and njm2846 is on/off control built in type. these product can be selected according to the applications. features high ripple rejection 75db typ. (f=1khz,3v version) output noise voltage vno=45 vrms typ. (vo=3v version) output capacitor with 2.2 f ceramic capacitor (vo 2.6v) output current io(max.)=800ma high precision output vo 1.0% low dropout voltage 0.18v typ. (io=500ma) on/off control (njm2846) internal short circuit current limit internal thermal overload protection bipolar technology package outline to-252-3 (NJM2845dl1), to-252-5 (njm2846dl3) pin configuration NJM2845dl1 njm2846dl3 equivalent circuit v out thermal protection bandgap reference v in gnd v out thermal protection bandgap reference v in control gnd 1.v in 2.gnd 3.v out 3 1 2 1.control 2.v in 3.gnd 4.vo 5.nc NJM2845dl1 njm2 8 46dl3 NJM2845dl1 njm2846dl3 1 2 3 4 5 3
NJM2845/46 - 2 - ver.2005-01-20 output voltage rank list device name v out njm284*dl*-18 1.8v njm284*dl*-23 2.3v njm284*dl*-25 2.5v njm284*dl*-03 3.0v njm284*dl*-33 3.3v njm284*dl*-05 5.0v absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +14 v control voltage v cont +14 (*1) v power dissipation p d 10(tc 25 c) 1.0(ta 25 c) w operating temperature to p r -40 +85 c storage temperature ts t g -40 +150 c (*1): when input voltage is less than +14v, the absolute maximum control voltage is equal to the input voltage. operating voltage v in =+2.5v(in case of vo<2.3v) ~ +(vo+10v) NJM2845 electrical characteristics (v in =vo+1v, c in =0.33 f, co=2.2 f(vo 2.6v: co=4.7 f), ta=25 c) parameter symbol test condition min. typ. max. unit output voltage vo io=30ma -1.0% - +1.0% v quiescent current i q io=0ma - 400 600 a output current io vo - 0.3v 800 1050 - ma line regulation ? vo/ ? v in v in =vo+1v vo+6v, io=30ma - - 0.10 %/v load regulation ? vo/ ? io io=0 800ma - - 0.004 %/ma dropout voltage(*2) ? v i -o io=500ma - 0.18 0.28 v ripple rejection rr ein=200mvrms, f=1khz, io=10ma, vo=3v version - 75 - db average temperature coefficient of output voltage ? vo/ ? ta ta = 0 85 c, io=10ma - 50 - ppm/ c output noise voltage v no f=10hz 80khz, io=10ma, vo=3v version - 45 - vrms (*2): the output voltage excludes under 2.3v. 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.
NJM2845/46 - 3 - ver.2005-01-20 power dissipation vs. ambient temperature test circuit NJM2845 v in v in v out gnd 0.33 f i in i out v o u v a (ceramic) 2.2 f *3 *3 vo 2.6v version: co=4.7 f(ceramic) typical application NJM2845 v in v in v out gnd 0.33 f v out 2.2 f *4 *4 vo 2.6v version: co=4.7 f njm2846dl3 (topr=-40~+85c,tj=+150c,p d =10w(t c 25c),p d =1w(ta 25c)) 0 2 4 6 8 10 12 -50 -25 0 25 50 75 100 ambient temperature ta(c) power dissi p ation pd ( w ) heat sink without heat sink hs =5c/w hs =20c/w hs =10c/w
NJM2845/46 - 4 - ver.2005-01-20 njm2846 electrical characteristics (v in =vo+1v, c in =0.33 f, co=2.2 f(vo 2.6v: co=4.7 f), ta=25 c) parameter symbol test condition min. typ. max. unit output voltage vo io=30ma -1.0% - +1.0% v quiescent current i q io=0ma - 400 600 a quiescent current at control off i q (off) v cont =0v - - 100 na line regulation io vo - 0.3v 800 1050 - ma line regulation ? vo/ ? v in v in =vo+1v vo+6v, io=30ma - - 0.10 %/v load regulation ? vo/ ? io io=0 800ma - - 0.004 %/ma dropout voltage(*5) ? v i -o io=500ma - 0.18 0.28 v ripple rejection rr ein=200mvrms, f=1khz, io=10ma, vo=3v version - 75 - db average temperature coefficient of output voltage ? vo/ ? ta ta = 0 85 c, io=10ma - 50 - ppm/ c output noise voltage v no f=10hz 80khz, io=10ma, vo=3v version - 45 - vrms control current i cont v cont =1.6v, io=0ma - 3 12 a control voltage for on-state v cont(on) 1.6 - - v control voltage for off-state v cont(off) - - 0.6 v (*5): the output voltage excludes under 2.3v. 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. power dissipation vs. ambient temperature njm2846dl3 (topr=-40~+85c,tj=+150c,p d =10w(t c 25c),p d =1w(ta 25c)) 0 2 4 6 8 10 12 -50 -25 0 25 50 75 100 ambient temperature ta(c) power dissi p ation pd ( w ) heat sink without heat sink hs =5c/w hs =20c/w hs =10c/w
NJM2845/46 - 5 - ver.2005-01-20 test circuit njm2846 v in v in v out control gnd 0.33 f i in i cont v cont i out v o u v v a a (ceramic) 2.2 *6 *6 vo 2.6v version: co=4.7 f(ceramic)
NJM2845/46 - 6 - ver.2005-01-20 typical application 1 in the case where on/off control is not required: njm2846 v in v out control gnd 0.33 f v out v in r (0 300k ? ) 2.2 f *7 *7 vo 2.6v version: co=4.7 f connect control terminal to v in terminal the quiescent current can be reduced by using a resistance ?r?. instead, it increases the minimum operating voltage. for further information, please refer to figure ?output voltage vs. control voltage?. 2 in use of on/off control: njm2846 v in v out control gnd 0.33 f v out v in r 2.2 f *7 *7 vo 2.6v version: co=4.7 f state of control terminal: ? ?h? output is enabled. ? ?l? or ?open? output is disabled.
NJM2845/46 -7- ver.2005-01-20 typical characteristics (NJM2845) 2.7 2.8 2.9 3 3.1 3.2 3.3 2.7 2.8 2.9 3 3.1 3.2 3.3 output voltage : vo(v) input voltage : v in (v) NJM2845_3.0v output voltage vs. input voltage @:ta=25 o c co=2.2 f(ceramic) io=0a io=200ma io=500ma 0 0.5 1 1.5 2 2.5 3 3.5 4 0 500 1000 1500 2000 output voltage : vo(v) NJM2845_3.0v output voltage vs. output current @:ta=25 o c v in =4v co=2.2 f( cera mic) output current : io(ma) 0 5 10 15 20 25 30 35 0 200 400 600 800 1000 ground pin current : i gn d (ma) NJM2845_3.0v ground pin current vs. output current @:ta=25 o c v in =4.0v co=2.2 f( ce ra mic) output current : i o (ma) 0 0.0 5 0.1 0.1 5 0.2 0.2 5 0.3 0.3 5 0 200 400 600 800 1000 output current:io(ma) @:ta=25 o c co=2.2 f (ceramic) dropout voltage:dv i-o (v) njm 2845_3v dropout voltage vs. output current -80 -70 -60 -50 -40 -30 -20 -10 0 0 200 400 600 800 1000 load regulation : dvo/dio(mv) output current : io(m a) NJM2845_3.0v load regulation vs. output current @:ta=25 o c v in =4.0v co =2.2 f(ceramic) 0 500 1000 1500 2000 2500 468101214 peak output current : io ma x (ma) NJM2845_3.0v peak output current vs. input voltage @:ta=25 o c co=2.2 f(ceramic) input voltage : v in (v)
NJM2845/46 - 8 - ver.2005-01-20 typical characteristics (NJM2845) 0 500 1000 1500 2000 2500 051015 quiescent current : i q ( a) NJM2845_3.0v quiescent current vs. input voltage @:ta=25 o c output is open. co=2.2 f(ceramic) input voltage : v in (v) 0 20 40 60 80 100 0.001 0.01 0.1 1 10 100 1000 output current : io(ma) output noise voltage : vn( vrms) NJM2845_3.0v output noise voltage vs. output current @:ta=25 o c v in =4 .0v lpf:80khz co=2.2 f(ceramic) 20 30 40 50 60 70 80 90 100 10 100 1000 10 4 10 5 ripple rejection ratio : rr (db) frequency : f (hz) NJM2845_3.0v ripple rejection ratio vs. frequency io=0ma io=10ma io=30ma @:ta=25 o c v in =4v ein=200mvrms co=2.2 f( ceramic) 10 100 1k 10k 100k io=100ma 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 100 1000 output current : io(ma) ripple rejection : rr (db) NJM2845_3v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c v in =4v ein=200mvrms co=2.2 f(ceramic) 0.1 1 10 100 0.001 0.01 0.1 1 10 100 10 3 0.02 output current : io(m a) @:ta=25 o c co=2.2 f(ceramic) v in =4 .0v equivalent serise resistance : esr( ? ? ? ? ) NJM2845_3.0v equivalent serise resistance vs. output current stable region 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 -50 0 50 100 150 io=500ma co=2.2 f(ce ramic ) dropout voltage:dv i-o (v) NJM2845_3.0v dropout voltage vs. temperature temperat ure : ta ( o c)
NJM2845/46 - 9 - ver.2005-01-20 typical characteristics (NJM2845) 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage : vo(v) NJM2845_3.0v output voltage vs. temperature @:vin=4.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 0 500 1000 1500 2000 -50 0 50 100 150 peak output current : io max (ma) NJM2845_3.0v peak output current vs. input voltage @:ta=25 o c co=2.2 f( ce ra mi c) temperature : ta ( o c) 0 100 200 300 400 500 600 -50 0 50 100 150 quiescent current : i q (ma) NJM2845_3.0v quiescent current v.s. input voltage @:v in =4 .0v output is open. co=2.2 f ( cer amic) temperature : ta ( o c) -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio(%/v) NJM2845_3.0v line regulation vs. temperature @:v in =4.0-9.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 0 0.005 0.01 0.015 0.02 0.025 0.03 -50 0 50 100 150 load regulation : dvo/dio(%/ma) NJM2845_3.0v load regulation vs. temperature @:v in =4.0v io=0-800ma co=2.2 f (ceramic) temperature : ta ( o c) 0 0.5 1 1.5 2 2.5 3 3.5 4 -50 0 50 100 150 200 output voltage : vo(v) NJM2845_3.0v output voltage vs. temperature @:v in =4.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c)
NJM2845/46 - 1 0 - ver.2005-01-20 typical characteristics (NJM2845) 0 200 400 600 800 1000 -50 0 50 100 150 200 short circuit current : isc (ma) NJM2845_3.0v short circuit current v.s. temperature @:v in =4.0v co=2 .2 f (ceramic) output is short to ground. temperature : ta ( o c) 2.94 2.96 2.98 3 3.02 3.04 3.06 3.08 3.1 -2 -1 0 1 2 3 4 5 6 0 40 80 120 160 200 NJM2845_3v line transient response output voltage : vo [v] input voltage : v in [v] time : t [ s] input voltage output voltage @:ta=25 o c v in =4 v co=2.2 f io=30ma 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 3.25 100 200 300 400 500 600 700 800 900 0 40 80 120 160 200 NJM2845_3v load transient response output voltage : vo [v] ou tp ut cu rren t : io [ma] time : t [ s] output current output voltage @:ta=25 o c v in =4 v co=2.2 f
NJM2845/46 -11- ver.2005-01-20 typical characteristics (njm2846) 2.7 2.8 2.9 3 3.1 3.2 3.3 2.7 2.8 2.9 3 3.1 3.2 3.3 output voltage : vo(v) input voltage : v in (v) njm2846_3.0v output voltage vs. input voltage @:ta=25 o c co =2 .2 f(ceramic) io=0a io=200ma io=500ma 0 0.5 1 1.5 2 2.5 3 3.5 4 0 500 1000 1500 2000 output voltage : vo(v) njm2846_3.0v output voltage vs. output current @:ta=25 o c v in =4 .0v co=2.2 f(ceramic) output current : io(ma) 0 5 10 15 20 25 30 35 0 200 400 600 800 1000 ground pin current : i gnd (ma) njm2846_3.0v ground pin current v.s. output current @:ta=25 o c v in =4.0v co=2.2 f(ceramic) output current : i o (ma) 0 0.0 5 0.1 0.1 5 0.2 0.2 5 0.3 0.3 5 0 200 400 600 800 1000 output current:io(ma) @:ta=25 o c co=2.2 f(cerami c) dropout voltage:dv i-o (v) njm2846_3.0v dropout voltage vs. output current 0 10 20 30 40 50 60 00.511.522.533.54 control current : i cont ( a) control voltage : v cont (v) njm2846_3.0v control current vs. control voltage @:ta=25 o c v in =4.0v co=2.2 f( ce ra mic) io=30ma rc=0 ? rc =5 0k ? rc=100k ? 0 0.5 1 1.5 2 2.5 3 3.5 00.511.522.53 output voltage : vo(v) control voltage : v cont (v) njm2846_3.0v output voltage vs. control voltage @:ta=25 o c v in =4.0v co=2.2 f( ce ra mic) io=30ma rc=0 ? rc=50k ? rc=100k ?
NJM2845/46 - 12 - ver.2005-01-20 typical characteristics (njm2846) -80 -70 -60 -50 -40 -30 -20 -10 0 0 200 400 600 800 1000 load regulation : dvo/dio(mv) output current : io(ma) njm2846_3.0v load regulation vs. output current @:ta=25 o c v in =4.0v co=2.2 f(ceramic) 0 500 1000 1500 2000 2500 4 6 8 10 12 14 peak output current : io max (ma) njm2846_3.0v peak output current vs. input voltage @:ta=25 o c co=2.2 f( cera mic) input voltage : v in (v) 0 50 0 1000 1500 2000 2500 051015 quiescent current : i q ( a) njm2846_3.0v quiescent current v.s. input voltage @:ta=25 o c output is open. co=2.2 f( ce ra mic) including icont input voltage : v in (v) 0 20 40 60 80 100 0.001 0.01 0.1 1 10 100 1000 output current : io(ma) output noise voltage : vn( vrms) njm2846_3.0v output noise voltage vs. output current @:ta=25 o c v in =4.0v lpf:80khz co=2.2 f(ceramic) 20 30 40 50 60 70 80 90 10 0 ripple rejection ratio : rr (db) frequency : f (hz) njm2846_3.0v ripple rejection ratio v.s. frequency io=0ma io=10ma io=30ma @:ta=25 o c v in =4.0v ein=200mvrms co =2.2 f (ceramic) 10 100 1k 10k 100k io=100ma 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 100 1000 output current : io(ma) ripple rejection : rr (db) njm2846_3.0v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c v in =4 .0v ein=200mvrms co=2 .2 f(ceramic)
NJM2845/46 -1 3 - ver.2005-01-20 typical characteristics (njm2846) 0.1 1 10 100 0.001 0.01 0.1 1 10 100 10 3 0.02 output current : io(m a) @:ta=25 o c v in =4 .0v co=2.2 f equivalent serise resistance : esr( ? ? ? ? ) njm2846_3.0v equivalent serise resistance vs. output current stable region 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 -50 0 50 100 150 io=500ma co=2.2 f(ce ramic ) dropout voltage:dv i-o (v) njm2846_3.0v dropout voltage vs. output current temperat ure : ta ( o c) 0 0.5 1 1.5 2 -50 0 50 100 150 control voltage :vcont-off [v] njm2846_3.0v control voltage v.s. temperature @:v in =4.0v io=30ma co=2.2 f(ceramic) temperature : ta ( o c) 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage : vo(v) njm2846_3.0v output voltage vs. temperature @:v in =4.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 0 500 1000 1500 2000 -50 0 50 100 150 peak output current: io_peak (ma) njm2846_3.0v peak output current v.s. temperature @:v in =4.0v co=2 .2 f (ceramic) temperature : ta ( o c) 0 100 200 300 400 500 600 -50 0 50 100 150 quiescent current : i q ( a) njm2846_3.0v quiescent current v.s. input voltage @:v in =4 .0v output is open. co=2.2 f (ceramic) temperature : ta ( o c)
NJM2845/46 - 14 - ver.2005-01-20 typical characteristics (njm2846) -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio(%/v) njm2846_3.0v line regulation vs. temperature @:v in =4.0-9.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 0 0.005 0.01 0.015 0.02 0.025 0.03 -50 0 50 100 150 load regulation : dvo/dio(%/ma) njm2846_3.0v load regulation vs. temperature @:v in =4.0v io=0-800ma co=2.2 f (ceramic) temperature : ta ( o c) 0 0.5 1 1.5 2 2.5 3 3.5 4 -50 0 50 100 150 200 output voltage : vo(v) njm2846_3.0v output voltage vs. temperature @:v in =4.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 0 200 400 600 800 1000 -50 0 50 100 150 short circuit current : isc (ma) njm2846_3.0v short circuit current v.s. temperature @:v in =4.0v co=2 .2 f (ceramic) output is short to ground. temperature : ta ( o c) -1 0 1 2 3 4 5 6 7 -30 -25 -20 -15 -10 -5 0 5 10 012345 njm2846_3.0v on/off tran si en t response wi thou t load output voltage : vo [v] control voltage : vo [v] time : t [s] control voltage output voltage @:ta=25 o c v in =4.0v co=2.2uf(ceramic) io=0ma -1 0 1 2 3 4 5 6 7 -30 -25 -20 -15 -10 -5 0 5 10 0 4 8 12 16 20 njm2846_3.0v on/off tran si en t response wi thou t load output voltage : vo [v] control voltage : vo [v] time : t [ms] control voltage output voltage @:ta=25 o c v in =4.0v co=2.2uf(ceramic) io=30ma
NJM2845/46 -1 5 - ver.2005-01-20 typical characteristics (njm2846) 2.94 2.96 2.98 3 3.02 3.04 3.06 3.08 3.1 -2 -1 0 1 2 3 4 5 6 0 40 80 120 160 200 njm2846_3v line transient response output voltage : vo [v] input voltage : v in [v] time : t [ s] input voltage output voltage @:ta=25 o c v in =4 v co=2.2 f io=30ma 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 3.25 100 200 300 400 500 600 700 800 900 0 40 80 120 160 200 njm2846_3v load transient response output voltage : vo [v] ou tp ut cu rren t : io [ma] time : t [ s] output current output voltage @:ta=25 o c v in =4 v co=2.2 f [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.

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