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NJM2894 3output low dropout voltage regulator general description package outline the NJM2894 is a 3ch low dropout voltage regulator with on/off control in tvsp-8 package. it is suitable for camcorder, ic decoder, camera and other portable items. features high ripple rejection 75db typ. (f=1khz,vo=3v version) output noise voltage vno=45 vrms typ. output capacitor with 1.0uf ceramic capacitor (vo 2.7v) output current io(max.)=ch1=150ma ch2,ch3=80ma high precision output vo 1.0% low dropout voltage 0.10v typ. (io=60ma) on/off control (active high) internal short circuit current limit internal thermal overload protection bipolar technology package outline tvsp-8 pin configuration NJM2894rb1-xxx NJM2894rb1 pin function 1.v out 1 2.v out 2 3.v out 3 4.gnd 5.control3 6.control2 7.control1 8.v in 8 5 1 4 6 7 23
NJM2894 equivalent circuit v out 1 v in thermal protection bandgap reference control1 v out 2 control2 gnd v out 3 control3
NJM2894 output voltage rank list vout device name ch1 ch2 ch3 NJM2894rb1-ccc 2.1v 2.1v 2.1v NJM2894rb1-lll 3.0v 3.0v 3.0v NJM2894rb1-ylc 5.0v 3.0v 2.1v 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 320 mw operating temperature topr ? 40 to +85 c storage temperature ts t g ? 40 to +125 c (*1) when input voltage is less than +14v, the absolute maximum control voltage is equal to the input voltage. electrical characteristics (v in =vo+1v, c in =0.1 f, co=1.0uf: vo 2.7v (co=2.2uf: 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 current1 i q1 v cont1 =v in , v cont2 =v cont3 =0v *1ch on io=0ma, expect icont ? 150 220 a quiescent current2 i q2 v cont1 = v cont2 =v in , v cont3 =0v *2ch on io=0ma, expect icont ? 270 400 a quiescent current3 i q3 v cont1 = v cont2 =v cont3 =v in io=0ma, expect icont ? 390 580 a quiescent current at control off i q(off) v cont =0v ? ? 100 na output current1 io ch1 ,,, : vo ? 0.3v 150 200 - ma output current2 io ch2,3 : vo ? 0.3v 80 100 - ma line regulation ? vo/ ? v in v in =vo+1v to vo+6v, io=30ma ? ? 0.10 %/v load regulation1 ? vo/ ? io1 ch1 ,,, : io=0 to 100ma ? ? 0.03 %/ma load regulation2 ? vo/ ? io2 ch2,3 : io=0 to 60ma ? ? 0.03 %/ma dropout voltage1 ? v i ? o1 io=60ma ? 0.10 0.18 v dropout voltage2 ? v i ? o2 io=40ma ? 0.10 0.18 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 t o 8 5 c, io=10ma ? 50 ? ppm/ c output noise voltage v no f=10hz to 80khz, io=10ma, vo=3v version ? 45 ? vrms control voltage for on-state v cont(on) 1.6 ? ? v control voltage for off-state v cont(off) ? ? 0.6 v (*2) v in =vo+1v means add 1v to higher output voltage. 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.
NJM2894 test circuit NJM2894 v in v in v out 1 control1 gnd 0.1 f i in i cont 1 v cont 1 v a a control2 i cont 2 v cont 2 v a v out 2 i out 2 v out 2 v i out 1 v out 1 v control3 i cont 3 v cont 3 v a v out 3 1.0 f *3 i out 3 v out 3 v *3 vo 2.6v version: co=2.2 f(ceramic) (ceramic 1.0 f *3 (ceramic) 1.0 f *3 (ceramic)
NJM2894 typical application 1 in the case where on/off control is not required: NJM2894 v in v out 1 control1 gnd 0.1 f v out 1 v in r1 (0~300k ? ) control2 v out 2 r2 (0~300k ? ) v out 2 control3 v out 3 r3 (0~300k ? ) v out 3 1.0 f *4 *4 vo 2.6v version: co=2.2 f 1.0 f *4 1.0 f *4 connect control terminal to v in terminal
NJM2894 2 in use of on/off control: NJM2894 v in v out 1 control1 gnd 0.1 f v out 1 v in r2 r3 v out 2 v out 2 control2 r1 v out 3 v out 3 control3 1.0 f *4 *4 vo 2.6v version: co=2.2 f 1.0 f *4 1.0 f *4 state of control terminal: ? ?h? output is enabled. ? ?l? or ?open? output is disabled. 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.
NJM2894 electrical characteristics 2.7 2.8 2.9 3 3.1 3.2 2.72.82.9 3 3.13.23.33.43.5 input voltage :vin [v] @:ta=25 o c co=1 f(ceramic) output voltage :vo [v] NJM2894_3v output voltage v.s. input voltage io=0a io=30ma io=100ma 0 0.5 1 1.5 2 2.5 3 3.5 4 0 50 100 150 200 250 300 njm 2894_3v output voltage vs. output current output voltage :vo [v] output current :io [ma] @:ta=25 o c v in =4v co=1 f( cera mic) 0 5 10 15 20 0 50 100 150 200 ground pin current :ignd [ma] output current :io [ma] NJM2894_3v ground pin current vs. output voltage @:ta=25 o c v in =6 v co=1 f(ceramic) 0 0.05 0.1 0.15 0.2 0.25 0.3 0 50 100 150 200 output current :io [ma] @:ta=25 o c co=1 f(ceramic) dropout voltage :dvi-o [v] NJM2894_3v dropout voltage vs. output current 0 10 20 30 40 50 60 00.511.522.533.54 control voltage :vcont [v] @:ta=25 o c v in =4 v co=1 f(ceramic) io=30ma control current :icont [ a] NJM2894_3v control current v.s. control voltage rc=0 ? rc=50k ? rc=100k ? 0 0.5 1 1.5 2 2.5 3 3.5 4 00.511.522.53 control voltage :vcont [v] @:ta=25 o c v in =4 v co=1 f(ceramic) io=30ma output voltage :vo [v] NJM2894_3v output voltage v.s. control voltage rc=0 ? rc=50k ? rc=100k ?
NJM2894 electrical characteristics -50 -40 -30 -20 -10 0 0 50 100 150 200 load regulation :dvo/dio [mv] output current :io [ma] NJM2894_3v load regulation vs. output current @:ta=25 o c v in =4 v co=1 f(ceramic) 0 50 100 150 200 250 300 350 400 468101214 peak output current :io max [ma] input voltage :v in [v] NJM2894_3v peak output current vs. input voltage @:ta=25 o c co=1 f( ce ra mic) 0 1000 2000 3000 4000 5000 6000 051015 quiescent current : iq [ a] NJM2894_3v quiescent current v.s. input voltage @:ta=25 o c output is open. co=1 f(ceramic) including icont input voltage :v in [v] vc ont1 =v in vc ont2 ,3=0v vc ont1 ,2=v in vc ont3 =0 v vcont1,2,3=v in 0 20 40 60 80 100 0.001 0.01 0.1 1 10 100 output current :io [ma] output noise voltage :vn [ vrms] NJM2894_3v output noise voltage vs. output current @:ta=25 o c v in =4v co=1 f co=2.2 f 20 30 40 50 60 70 80 90 10 100 1000 10 4 10 5 ripple rejection ratio :rr [db] njm 2894_3v ripple rejection ratio v.s. frequency frequency : f [hz] io=0ma io=10ma io=30ma @:ta=25 o c v in =4 v ein=200mvrms co=1 f(ce ra mic) 10 100 1k 10k 100k 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 100 output current :io [ma] ripple rejection ratio :rr [db] njm 2894_3v ripple rejection ratio vs. output current @:ta=25 o c v in =4v ein=200mvrms co=1 f(ceramic) f=10khz f=1khz
NJM2894 electrical characteristics 0.1 1 10 100 0.001 0.01 0.1 1 10 100 output current :io [ma] @:ta=25 o c v in =4v co=1 f(ceramic) equivalent series resistance :esr [ ? ? ? ? ] NJM2894_3v equivalent series resistance vs. output current stable region 0.02 0 0.05 0.1 0.15 0.2 0.25 0.3 -50 0 50 100 150 dropout voltage :dvi-o [v] NJM2894_3v dropout voltage v.s. temperature @:io=60ma io=40ma :2ch,3ch co=1mf(ceramic) temperature :ta [ o c] 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage :vo [v] NJM2894_3v output voltage v.s. tem perature @:v in =4v io=30ma co=1 f(ceramic) temperature :ta [ o c] 0 0.5 1 1.5 2 -50 0 50 100 150 control voltage :vcont-off [v] NJM2894_3v control voltage v.s. t em perature @:v in =4v output is open. co=1 f(ceramic) temperature :ta [ o c] 0 2 4 6 8 10 -50 0 50 100 150 control current : i cont [ a] temperat ure ta ( o c) njm 2894_3.0v control current v.s. temperature @:v in =4v output is open co=1 f(ceramic) v cont =1 .6v
NJM2894 electrical characteristics 0 175 350 525 700 -50 0 50 100 150 quiescent current : iq [ a] NJM2894_3v quiescent current v.s. temperature @:v in =4 v output is open. co=1 f(ce ra mic) temperature :ta [ o c] vc ont1 ,2,3=vin 0 50 100 150 200 -50 0 50 100 150 short circuit current :isc [ma] NJM2894_3v short circuit current v.s. temperature @:v in =4 v output is short to ground. co=1 f( ce ra mic) temperature :ta [ o c] -0.2 -0.1 0 0.1 0.2 -50 0 50 100 150 line regulation :dvo/dvin [%/v] NJM2894_3v line regulation v.s. t emperature @:v in =4-9v io=30ma co=1 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] NJM2894_3v load regulation v.s. temperature @:v in =4v io=0-100ma co=1 f(ceramic) temperature :ta [ o c] 0 0.5 1 1.5 2 2.5 3 3.5 -50 0 50 100 150 200 output voltage :vo [v] NJM2894_3v output voltage v.s. tem perature @:v in =4 v io=30ma co=1 f(ceramic) temperature :ta [ o c]
NJM2894 electrical characteristics -1 0 1 2 3 4 5 6 7 -25 -20 -15 -10 -5 0 5 10 15 0 4 8 121620 njm 2894_3v on/off transient response output voltage : vo [v] control voltage : vo [v] time : t [ms] control voltage output vo ltage @:v in =4v co=1 f(ceramic) io=30ma -1 0 1 2 3 4 5 6 7 -25 -20 -15 -10 -5 0 5 10 15 012345 NJM2894_3v on/off transient response without load output voltage : vo [v] control voltage : vo [v] time : t [s] control voltage output voltage @:v in =4v co=1 f(ce rami c) io=0a 2.96 2.98 3 3.02 3.04 3.06 3.08 3.1 3.12 -1 0 1 2 3 4 5 6 7 0 40 80 120 160 200 NJM2894_3v line transient response output voltage : vo [v] time : t [ s] input voltage output voltage @:io=30ma co=1 f(ceramic) input voltage : v in [v] 2.94 2.96 2.98 3 3.02 3.04 3.06 3.08 3.1 -250 -200 -150 -100 -50 0 50 100 150 04080120160200 NJM2894_3v load transient response ou tput vo lta ge : vo [v] time : t [ s] output current output voltage @:v in =4 v co=1 f(ceramic) output current : io [ma] [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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