njm2387 a - 1 - ver.2013-06-17 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 chang ing 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 block diagram 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.2013-06-17 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 1.190(*2) / 3.125(*3) mw 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. (*2): mounted on glass epoxy board. (76.2 114.3 1.6mm:based on eia/jdec standard size, 2layers, cu area 100mm 2 ) (*3): mounted on glass epoxy board. (76.2 114.3 1.6mm:based on eia/jdec standard, 4layers) (for 4layers: applying 74.2 74.2mm inner cu area and a thermal via hole to a board based on jedec standard jesd51-5) 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 condition s 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(*4) - - 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 (*4): when on/off control terminal is open, output voltage is off.
njm2387 a - 3 - ver.2013-06-17 power dissipation vs. ambient temperature 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) NJM2387Adl3 y powerdissipation (topr=-40~+85c,tj=150c) 0 500 1000 1500 2000 2500 3000 3500 -50 -25 0 25 50 75 100 125 temperature : ta(c) power dissipation p d (mw) on 4 layers board on 2 layers board
NJM2387A - 4 - ver.2013-06-17 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 pin to v in pin. 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 pin: ? ?h? output is enabled. ? ?l? or ?open? output is disabled.
njm2387 a - 5 - ver.2013-06-17 *feed back resistance r1 the output voltage may rise against the set point by the leak current from the v out pin at high temperature when this resistance is set too big. conversely, the current flowing to r1 grows big w hen r1 is set too small, and make the consumption current increase. from the above, recommend 100 ? to 20k ? as a set range of r1. *in the case of using a resistance "r" between v in and control. if this resistor is inserted, it can reduce the control current when the control voltage is high. the applied voltage to control pin should set to consider voltage drop through the resistor ?r? and the minimum control voltage for on-state. the v cont (on) and i cont have temperature dependence as shown in t he "control current vs. temperature" and " control voltage vs. temperature" characte ristics. therefore, the resistance "r" should be selected to consider the temperature characteristics. *input capacitor c in input capacitor c in is required to prevent oscillation and reduce po wer supply ripple for applications when high power supply impedance or a long power supply line. therefore, use the recommended c in value (refer to conditions of electric characteristic) or larger and should connect between gnd and v in as shortest path as possible to avoid the problem. *output capacitor c o output capacitor (c o ) will be required for a phase compensation of the internal error amplifier. the capacitance and the equivalent se ries resistance (esr) influence to stable operation of the regulator. use of a smaller c o may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. on the other hand, use of a larger c o reduces output noise and ripple output, and also improves output transient response when rapid load change. therefore, use the recommended c o value (refer to conditions of electric characteristic) or larger and s hould connect between gnd and v out as shortest path as possible for stable operation in addition, please choose an appropriate capacitor in consi dering varied characteristics of capacitor (a frequency characteristic, a temperature charac teristic, and so on) when selecting c o .
NJM2387A - 6 - ver.2013-06-17 tyipical 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 1000 1500 ground pin curre nt : 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 1000 1500 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 0 0.5 1 1.5 2 2.5 3 3.5 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 =5 00ma 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 ?
njm2387 a - 7 - ver.2013-06-17 tyipical characteristics -3 -2 -1 0 1 2 3 0 500 1000 1500 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 noise 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) NJM2387A_10v ripple rejection vs. output current @:ta=25 o c vin=12v ein=500mvrms f=120hz co=22uf
NJM2387A - 8 - ver.2013-06-17 tyipical 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 1000 1500 2000 2500 -50 0 50 100 150 output peak current : io_peak (ma) NJM2387A_10v output peak current v.s. temperature @: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 =1 1v output is open. co=22 f temperature : ta ( o c)
njm2387 a - 9 - ver.2013-06-17 tyipical 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. temperature @: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 - 10 - ver.2013-06-17 tyipical 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 t ransi en t respo nse output voltage : vo [v] contr ol v oltage : v o [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 0 40 80 120 160 200 njm 2387a_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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