NJM2387A -1- ver.2006-11-22 NJM2387Adl3 adjustable low dropout voltage regulator with on/off control general description package outline the NJM2387A is an adjustable low dropout voltage regulator. the output current is up to 1.0a and dropout voltage is 0.2v typ. at io=0.5a. off control quiescent current is drastically reduced compare with the current njm2387 through changing on/off control circuit. the NJM2387A is suitable for power module, tv, display, car stereo and low power applications. features low dropout voltage ? v i-o =0.2v typ. at io=0.5a output current io(max.)=1.0a reference voltage vref=1.26v 2% on/off control internal short circuit current limit internal overvoltage protection internal thermal overload protection bipolar technology package outline to-252-5 pin configuration equivalent circuit v out gnd v in bandgap reference control current limit thermal protection overvoltage protection v adj pin function 1.v in 2.on/off control 3.v out 4.v adj 5.gnd NJM2387Adl3 NJM2387Adl3 3 12 3 4 5
NJM2387A - 2 - ver.2006-11-22 absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +35 v control voltage v cont +35(*1) v adjust terminal voltage v adj +6 v output current io 1.0 a power dissipation p d 10(tc 25 c) / 1(ta 25 c) w operating junction temperature range tj -40 +150 c operating temperature range topr -40 +85 c storage temperature range tstg -50 +150 c (*1): when input voltage is less than +35v, the absolute maximum control voltage is equal to the input voltage. electrical characteristics (v in =15v, v o =10v, io=0.5a, r1=1k ? , c in =0.33 f, c o =2 2 f, t j =2 5 c) measurement is conducted by pulse testing. parameter symbol conditions min. typ. max. unit input voltage v in - 3.8 - 30 v output voltage v o(adj) - 1.5 - 20 v reference voltage vref - 1.235 1.26 1.285 v line regulation ? vo/ ? v in v in =v o +1v v o +17v - 0.04 0.16 %/v load regulation ? vo/ ? io v in =v o +2v,io=0a 1.0a - 0.2 1.4 %/a average temperature coefficient of output voltage ? vo/ ? t tj=0 +125 c - 0.02 - %/ c quiescent current i q io=0a, v cont =2.7v except i cont - - 5 ma off control quiescent current i q(off) v cont =0v - - 1 a dropout voltage ? v i-o io=0.5a - 0.2 0.5 v ripple rejection rr vin=vo+2v, ein=0.5vrms ein=0.5vrms , f=120hz 52 65 - db on control voltage v cont(on) 2.0(*2) - - v off control voltage v cont(off) - - 0.4 v on control current i cont(on) v c =2.7v 10 30 50 a off control current i cont(off) v c =0.4v 1 3 5 a (*2): when on/off control terminal is open, output voltage is off.
NJM2387A - 3 - ver.2006-11-22 test circuit a v 3 io 22f vo 0.33f v in r l NJM2387A + 5 2 a v cont i cont i qoff + 1 a 4 r 2 r 1 =1k ? a i q vo = vref (1 + r2/r1) typical application 1 in the case where on/off control is not required: NJM2387A v in v out control gnd 0.33f 22f v out v in + + r 2 r 1 v adj 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: NJM2387A v in v out control gnd 0.33f 22f v out v in r + + r 2 r 1 v adj state of control terminal: ? ?h? output is enabled. ? ?l? or ?open? output is disabled.
NJM2387A - 4 - ver.2006-11-22 electrical characteristics 9 9.5 10 10.5 11 9 9.5 10 10.5 11 output voltage : vo(v) input voltage : v in (v) NJM2387A_10v output voltage vs. input voltage @:ta=25 o c co=22 f io=0a io=0.5a io=1a 0 2 4 6 8 10 12 0 500 1000 1500 2000 2500 output voltage : vo(v) NJM2387A_10v output voltage vs. output current @:ta=25 o c co=22 f output current : io(a) v in =22v v in =11v v in =35v 0 5 10 15 20 25 30 35 40 0 500 10 00 15 00 ground pin current : i gn d (ma) NJM2387A_10v ground pin current v.s. output current @:ta=25 o c v in =11v co=22 f r1=1k ? r2=6.94k ? output current : i o (ma) 0 0.2 0.4 0.6 0.8 1 0 500 10 00 15 00 output current:io(ma) @:ta=25 o c co=22 f r1=1k ? r2=6.94k ? dropout voltage:dv i-o (v) NJM2387A_10v dropout voltage vs. output current 0 20 40 60 80 100 00.511.522.533.5 control current : i cont ( a) control voltage : v cont (v) NJM2387A_10v control current vs. control voltage @:ta=25 o c v in =11v co=22 f io=500ma rc=0 ? rc=100k ? rc=50k ? 0 2 4 6 8 10 12 00.511.522.5 output voltage : vo(v) control voltage : v cont (v) NJM2387A_10v output voltage vs. control voltage @:ta=25 o c v in =1 1v co=22 f io=500ma rc=0 ? rc=100k ? rc=50k ?
NJM2387A - 5 - ver.2006-11-22 electrical characteristics -3 -2 -1 0 1 2 3 050010001500 load regulation : dvo-io(%/a) output current : io(ma) NJM2387A_10v load regulation vs. output current @:ta=25 o c v in =12v co=22 f r1=1k ? r2=6.94k ? 0 500 1000 1500 2000 2500 3000 10 15 20 25 30 35 peak output current : io max (ma) NJM2387A_10v peak output current vs. input voltage input voltage : v in (v) @:ta=25 o c r1=1k ? r2=6.94k ? co=22 f vo=9v 0 2 10 -10 4 10 -10 6 10 -10 8 10 -10 1 10 -9 0 5 10 15 20 25 30 35 NJM2387A_10v quiescent current(off) vs. input voltage @:ta=25 o c co =22 f v cont =0v quiescent current(off) : i qoff (a) input voltage : v in (v) 0 100 200 300 400 500 0.001 0.01 0.1 1 10 100 1000 output current : io(a) output noise voltage : vn( vrms) njm 2387a_10v output noi se voltage vs. output current @:ta=25 o c v in =1 1v lpf:80khz co=22 f 1 100m 1 100 1m 10m 10 20 30 40 50 60 70 80 90 100 ripple rejection ratio : rr (db) frequency : f (hz) io=0a io=0.1a io=0.5a @:ta=25 o c v in =12v ein=500mvrms co=22 f 10 100 1k 10k 100k NJM2387A_10v ripple rejection ratio v.s. frequency io=1a 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) NJM2387A_10v ripple rejection vs. output current @:ta=25 o c v in =1 2v ein=500mvrms f=120hz co=22 f( ce ra mic)
NJM2387A - 6 - ver.2006-11-22 electrical characteristics 0 0.05 0.1 0.15 0.2 0.25 0.3 -50 0 50 100 150 dropout voltage : dv i-o (v) NJM2387A_10v dropout voltage vs. tem perature @:io=0.5a co=22 f temperature : ta ( o c) 0 0.5 1 1.5 2 -50 0 50 100 150 control voltage :vcont-on [v] NJM2387A_10v control voltage vs. temperature @:v in =1 1v io=0.5a co=22 f temperature : ta ( o c) 9.6 9.8 10 10.2 10.4 -50 0 50 100 150 output voltage : vo(v) NJM2387A_10v output voltage vs. temperature @:v in =11v io =0.5 a co=22 f temperature : ta ( o c) 0 500 10 00 15 00 20 00 25 00 -50 0 50 100 150 output peak current : io_peak (ma) NJM2387A_10v output peak current v.s. tem perature @:v in =11v co=22 f temperature : ta ( o c) 0 0.5 1 1.5 2 2.5 3 -50 0 50 100 150 quiescent current : i q (ma) NJM2387A_10v quiescent current vs. input voltage @:v in =11v output is open. co=22 f temperature : ta ( o c)
NJM2387A -7- ver.2006-11-22 electrical characteristics -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio(%/v) NJM2387A_10v line regulation vs. tem perature @:v in =11-27v io =0.5 a co=22 f temperature : ta ( o c) -1 -0.5 0 0.5 1 -50 0 50 100 150 load regulation : dvo/dio(%/a) NJM2387A_10v load regulation vs. temperature @:v in =12v io=0-1a co=22 f temperature : ta ( o c) 0 2 4 6 8 10 12 -50 0 50 100 150 200 output voltage : vo(v) NJM2387A_10v output voltage vs. temperature @:v in =11v io =0.5 a co=22 f temperature : ta ( o c) 0 100 200 300 400 500 -50 0 50 100 150 short circuit current : isc (ma) NJM2387A_10v short circuit current vs. temperature @: v in =1 1v co=22 f output is short to ground. temperature : ta ( o c)
NJM2387A - 8 - ver.2006-11-22 electrical characteristics 0 2 4 6 8 10 12 14 16 -60 -50 -40 -30 -20 -10 0 10 20 012345 NJM2387A_10.0v on/off transient response without load output voltage : vo [v] control voltage : vo [v] time : t [s] control voltage output voltage @:ta=25 o c vdd=11v co=22 f io=0ma 0 2 4 6 8 10 12 14 16 -60 -50 -40 -30 -20 -10 0 10 20 0 4 8 121620 NJM2387A_10.0v on/off transi ent response output voltage : vo [v] contr ol v oltage : vo [v] time : t [ms] control voltage output voltage @:ta=25 o c vdd=11v co=22 f io=500ma 9.85 9. 9 9.95 10 10.05 10.1 10.15 10.2 10.25 5 6 7 8 9 10 11 12 13 0 40 80 120 160 200 NJM2387A_10.0v input transient response output voltage : vo [v] time : t [ s] input voltage output voltage @:ta=25 o c vdd=11v co=22 f io=500ma input voltage : v in [v] 9.4 9.6 9.8 10 10.2 10.4 10.6 10.8 11 -100 0 100 200 300 400 500 600 700 04080120160200 NJM2387A_10.0v load transient response output voltage : vo [v] time : t [us] output current output vo ltage @:ta=25 o c vdd=11v co=22 f io=450ma 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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