NJM2884 -1- ver.2006-12-07 low dropout voltage regulator general description package outline NJM2884 is a low dropout voltage regulator with on/off control. advanced bipolar technology achieves low noise, high ripple rejection and low quiescent current. features high ripple rejection 75db typ. (f=1khz, vo=3v version) low output noise voltage vno=45vrms typ. output capacitor with 2.2 f ceramic capacitor (vo 2.7v) output current io(max.)=500ma high precision output vo 1.0% low dropout voltage 0.18v typ. (io=100ma) on/off control internal thermal overload protection internal short circuit current limit bipolar technology package outline sot-89-5 pin configuration NJM2884u1 equivalent circuit control v out gnd v in bandgap reference thermal protection NJM2884u1 1. control(active high) 2. gnd 3. n.c. 4. v out 5. v in 123 4 52 NJM2884u1
NJM2884 - 2 - ver.2006-12-07 output voltage rank list device name v out NJM2884u1-21 2.1v NJM2884u1-25 2.5v NJM2884u1-03 3.0v NJM2884u1-33 3.3v NJM2884u1-48 4.8v NJM2884u1-05 5.0v absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +10 v control voltage v cont +10 v power dissipation p d 440(*1) mw operating temperature topr - 40 +85 c storage temperature tstg - 40 +150 c (*1): device itself. electrical characteristics (v in =vo+1v, c in =0.33f, co=2.2f: vo 2.7v (co=4.7f: vo 2.6v), 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 ? 200 300 a quiescent current at control off i q(off) v cont =0v ? ? 100 na output current io vo - 0.3v 500 650 ? ma line regulation ? vo/ ? v in v in =vo+1v vo+6v (vo 3v version), v in =vo+1v 9v (vo>3v version), io=30ma ? ? 0.10 %/v load regulation ? vo/ ? io io=0 500ma ? ? 0.009 %/ma dropout voltage ? v i-o io=300ma ? 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 ? 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 input voltage v in ? ? 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.
NJM2884 - 3 - ver.2006-12-07 test circuit NJM2884 v in v in v out control gnd 0.33f i in i cont v cont i out v out v v a a (*2) 2.2f (ceramic) (*2) vo 2.6v version: co=4.7f (ceramic) typical application 1 in the case where on/off control is not required: NJM2884 v in v out control gnd 0.33f v out v in (0~300k ? ) (*3) 2.2 f r (*3) vo 2.6v version: co=4.7f 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?.
NJM2884 - 4 - ver.2006-12-07 2 in use of on/off control: NJM2884 v in v out control gnd 0.33f v out v in (*3) 2.2f r (*3) vo 2.6v version: co=4.7f state of control terminal: ? ?h? output is enabled. ? ?l? or ?open? output is disabled. input capacitance c in input capacitance c in is required to prevent oscillation and reduce power supply ripple for applications with high power supply impedance or a long power supply line. use the c in value of 0.33f greater to avoid the problem. c in should connect between gnd and v in as short as possible. in the case of using a resistance "r" between v in and control. the current flow into the control terminal while the ic is on state (i cont ) can be reduced when a pull up resistance "r" is inserted between v in and the control terminal. the minimum control voltage for on state (v cont (on) ) is increased due to the voltage drop caused by i cont and the resistance "r". the i cont is temperature dependence as shown in the "control current vs. temperature" characteristics. therefore, the resistance "r" should be carefully selected to ensure the control voltage exceeds the v cont (on) over the required temperature range.
NJM2884 - 5 - ver.2006-12-07 typical characteristics 2.7 2.8 2.9 3 3.1 3.2 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 output voltage : vo(v) input voltage : v in (v) NJM2884_3.0v output voltage vs. input voltage @:ta=25 o c co =2.2 f io=0ma io=150ma io=500ma 0 0.5 1 1.5 2 2.5 3 3.5 4 0 200 400 600 800 1000 output voltage : vo(v) NJM2884_3.0v output voltage vs. output current @:ta=25 o c v in =4 .0v co=2.2 f output current : io(ma) 0 5 10 15 20 25 30 0 100 200 300 400 500 600 ground pin current : i gn d (ma) NJM2884_3.0v ground pin current vs. output current @:ta=25 o c v in =4.0v co=2.2 f( ceramic) output current : i o (ma) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0 80 160 240 320 400 480 560 640 output current:io(ma) @:ta=25 o c co=2.2 f(ceramic) dropout voltage:dv i-o (v) NJM2884_3.0v dropout voltage vs. output current 0 0.5 1 1.5 2 2.5 3 3.5 4 00.511.522.53 output voltage : vo(v) control voltage : v co nt (v) NJM2884_3.0v output voltage vs. control voltage @:ta=25 o c v in =4 .0v co =2 .2 f(ceramic) io=3 0ma rc=0 ? rc=50k ? rc=100k ?
NJM2884 - 6 - ver.2006-12-07 typical characteristics -80 -70 -60 -50 -40 -30 -20 -10 0 0 100 200 300 400 500 600 load regulation : dvo/dio(mv) output current : io(ma) NJM2884_3.0v load regulation vs. output current @:ta=25 o c v in =4.0v co=2.2 f(ceramic) 0 200 400 600 800 1000 45678910 peak output current : io max (ma) NJM2884_3.0v peak output current vs. input voltage @:ta=25 o c co=2.2 f(ceramic) input voltage : v in (v) 0 50 0 1000 1500 2000 0246810 quiescent current : i q ( a) NJM2884_3.0v quiescent current vs. input voltage @:ta=25 o c output is open. co=2.2 f(ceramic) i nc luding i co nt input voltage : v in (v) 0 20 40 60 80 100 0.001 0.01 0.1 1 10 100 output current : io(ma) output noise voltage : vn(uvrms) NJM2884_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) io=0ma io=10ma io=30ma @:ta=25 o c v in =4.0v ein=200mvrms co=2.2 f( cera mic) 10 100 1k 10k 100k NJM2884_3.0v ripple rejection ratio vs. frequency io=300ma 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 100 output current : io(ma) ripple rejection : rr (db) @:ta=25 o c v in =4.0v ein=200mvrms co=2.2 f( cera mic) f=10khz f=1khz NJM2884_3.0v ripple rejection vs. output current
NJM2884 -7- ver.2006-12-07 typical characteristics 0.1 1 10 100 0.001 0.01 0.1 1 10 100 0.02 output current : io(ma) @:ta=25 o c co=2.2 f(ceramic) v in =4 .0v equivalent serise resistance : esr ( ? ? ? ? ) NJM2884_3.0v equivalent serise resistance vs. output current stable region 0 0.0 5 0.1 0.1 5 0.2 0.2 5 0.3 0.3 5 0.4 -50 0 50 100 150 dropout voltage : dv i-o (v) NJM2884_3.0v dropout voltage vs. temperature temperature : ta ( o c) @:io =300ma co =2 .2 f(ceramic) 0 0.5 1 1.5 2 -50 0 50 100 150 temperature : ta ( o c) control voltage :vcont-off (v) NJM2884_3.0v control voltage vs. tem perature @:v in =4.0v io=30ma co=2.2 f(ceramic) 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage : vo(v) NJM2884_3.0v output voltage vs. tem perature temperature : ta ( o c) @:v in =4 .0v io=30ma co=2.2 f 0 200 400 600 800 1000 -50 0 50 100 150 output peak current : io_peak (ma) temperature : ta ( o c) NJM2884_3.0v output peak current vs. temperature @:v in =4 .0v co =2 .2 f(ceramic) 0 50 10 0 15 0 20 0 25 0 30 0 -50 0 50 100 150 quiescent current : i q ( a) NJM2884_3.0v quiescent current vs. temperature temperature : ta ( o c) @:v in =4 .0v output is open. co=2.2 f i nc luding i co nt
NJM2884 - 8 - ver.2006-12-07 typical characteristics -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio(%/v) NJM2884_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(%/a) NJM2884_3.0v load regulation vs. temperature temperature : ta ( o c) @:v in =4 .0v io=0-500ma co=2.2 f(ceramic) 0 0.5 1 1.5 2 2.5 3 3.5 4 -50 0 50 10 0 15 0 20 0 output voltage : vo(v) NJM2884 3.0v output voltage vs. temperature temperature : ta ( o c) @:v in =4 .0v io=30ma co=2.2 f(ceramic) 0 50 100 150 200 250 300 350 400 -50 0 50 100 150 short circuit current : isc (ma) NJM2884_3.0v short circuit current vs. temperature temperature : ta ( o c) @: v in =4.0v co=2.2 f(ceramic)
NJM2884 - 9 - ver.2006-12-07 typical characteristics -1 0 1 2 3 4 5 6 7 -30 -25 -20 -15 -10 -5 0 5 10 012345 NJM2884_3.0v on/off transient response output voltage : vo [v] control voltage : vo [v] time : t [ms] control voltage output voltage @:ta=25 o c v in =4.0v co=2.2 f(ceramic) io=30ma -1 0 1 2 3 4 5 6 7 -30 -25 -20 -15 -10 -5 0 5 10 012345 NJM2884_3.0v on/off transient response without 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=2.2 f(ceramic) io=30ma 2. 7 2. 8 2. 9 3 3. 1 3. 2 3. 3 3. 4 3. 5 -250 -200 -150 -100 -50 0 50 100 150 0285684112140 njm 2884_3.0v load transient response output voltage : vo [v] time : t [ s] output current output voltage @:ta=25 o c v in =4.0v co=2.2 f(ceramic) output current : io [ma] 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5 0 1 2 3 4 5 6 7 8 0285684112140 NJM2884_3.0v line transient response output voltage : vo [ v] time : t [ s ] input voltage output voltage @:ta=25 o c v in =4.0v co =2.2 f(ceramic) lo=30ma input voltage : v in [v] [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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