1 NJM2856 ver.2008-11-12 low dropout voltage regulator general description package outline the NJM2856 is a low dropout voltage regulator with on/off control. advanced bipolar technology achieves low noise, high ripple rejection. it delivers up to 5v/1a output power with the maximum input voltage of 10v. the NJM2856 is suitable for va rious applications such as portable / consumer equipments. features high ripple rejection 75db ty p. (f=1khz,vo=3v version) output noise voltage vno=45vrms typ. output capacitor with 2.2 f ceramic capacitor (vo 2.7v) output current io(max.)=1a high precision output vo 1.0% low dropout voltage 0.20v typ. (io=600ma) on/off control internal short circuit current limit internal thermal overload protection bipolar technology package outline to-252-5 pin configuration equivalent circuit v out thermal protection bandgap reference v in control gnd NJM2856dl3 1.control 2.v in 3.gnd 4.vo 5.nc 1 2 3 4 5 3 NJM2856dl3
2 NJM2856 ver.2008-11-12 output voltage rank list the white column shows applicable voltage rank(s) device name v out device name v out NJM2856dl3-15 1.5v NJM2856dl3-35 3.5v NJM2856dl3-16 1.6v NJM2856dl3-36 3.6v NJM2856dl3-17 1.7v NJM2856dl3-37 3.7v NJM2856dl3-18 1.8v NJM2856dl3-38 3.8v NJM2856dl3-19 1.9v NJM2856dl3-39 3.9v NJM2856dl3-02 2.0v NJM2856dl3-04 4.0v NJM2856dl3-21 2.1v NJM2856dl3-41 4.1v NJM2856dl3-22 2.2v NJM2856dl3-42 4.2v NJM2856dl3-23 2.3v NJM2856dl3-43 4.3v NJM2856dl3-24 2.4v NJM2856dl3-44 4.4v NJM2856dl3-25 2.5v NJM2856dl3-45 4.5v NJM2856dl3-26 2.6v NJM2856dl3-46 4.6v NJM2856dl3-27 2.7v NJM2856dl3-47 4.7v NJM2856dl3-28 2.8v NJM2856dl3-48 4.8v NJM2856dl3-29 2.9v NJM2856dl3-49 4.9v NJM2856dl3-03 3.0v NJM2856dl3-05 5.0v NJM2856dl3-31 3.1v NJM2856dl3-32 3.2v NJM2856dl3-33 3.3v NJM2856dl3-34 3.4v
3 NJM2856 ver.2008-11-12 absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +10 v control voltae v cont +10 v power dissipation p d 1190(*1) mw operating temperature topr -40 +85 c storage temperature tstg -40 +150 c (*1): mounted on glass epoxy board. (114.3x 76.2x1.6mm: 2layers, fr-4, copper area 100mm 2 ) operating voltage v in =+2.5v ~ +8v (in case of vo<2.3v version) electrical characteristics (v in =vo+1v, c in =0.33f, co=2.2f(1.7v2v), io=30ma - - 0.10 %/v load regulation ? vo/ ? io io=0 1a - - 0.004 %/ma dropout voltage(*2) ? v i ? o io=600ma - 0.20 0.28 v ripple rejection rr ein=200mvrms,f=1khz, io=10ma vo=3.0v 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=3.0v version(*3) - 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 input voltage v in - - 8 v (*2): the output voltage excludes under 2.1v. (*3): vo>2.0v : v in =vo+1v, vo 2.0v : v in =3.0v the above specification is a common specificati on for all output voltages. therefore, it may be different fr om the individual s pecification for a spec ific output voltage.
4 NJM2856 ver.2008-11-12 power dissipation vs. ambient temperature test circuit NJM2856 v in v in v out gnd 0.33f i in i out v o u v a (ceramic) 2.2f *4 *4 1.7vNJM2856dl3 powerdissipation (topr=-40~+85c,tj=150c) 0 500 1000 1500 2000 2500 3000 3500 -50 -25 0 25 50 75 100 temperature : ta(c) power dissipation p d (mw) on 4 layers board on 2 layers board
5 NJM2856 ver.2008-11-12 typical application 1 in the case where on/off control is not required: NJM2856 v in v out control gnd 0.33f v out v in r 2.2f *5 *5 1.7vNJM2856 v in v out control gnd 0.33f v out v in r 2.2f *5 *5 1.7v 6 NJM2856 ver.2008-11-12 input capacitance c in input capacitance c in is required to prevent oscillation and re duce power supply rippl e 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. output capacitance co output capacitor (co) is require d for a phase compensation of the internal error amplifier. the capacitance and the equival ent series resistance (esr) influenc e stability of the regulator. if use a smaller co, it may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. theref ore, use co with the recommended capacitance or greater value and connect between vo terminal and gnd te rminal with minimal wiring. the recommended capacitance depends on the output voltage. low voltage regulator requires greater value of the co. thus, check the reco mmended capacitance for each output voltage. use of a greater co reduces output noise and ripple output, and also im proves transient response of the output voltage against rapid load change. this product is designed to work wi th any capacitor including a low esr capacitor for the co; however, refer "equivalent series resistance vs. ou tput current" and choose suitable capacitor.
7 NJM2856 ver.2008-11-12 typical characteristics 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) NJM2856_3.0v output voltage vs. input voltage @:ta=25 o c cnt=4.0v cin=0.33uf (ceramic) co=2.2uf(ceramic) io=0a io=500ma io=100ma io=1000ma 0 0.5 1 1.5 2 2.5 3 3.5 4 0 500 1000 1500 2000 2500 output voltage : vo(v) NJM2856_3.0v output voltage vs. output current @:ta=25 o c vin=cnt=4.0v cin=0.33uf(ceramic) co=2.2uf (ceramic) output current : io(ma) 0 5 10 15 20 25 30 35 0 200 400 600 800 1000 1200 ground pin current : i gnd (ma) output current : io(ma) NJM2856_3.0v ground pin current vs. output current @:ta=25 o c vin=4.0v cnt=4.0v cin=0.33uf (ceramic) co=2.2uf(ceramic) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0 200 400 600 800 1000 1200 1400 output current:io(ma) @:ta=25 o c cin=0.33uf(ceramic) co=2.2uf(ceramic) dropout voltage:dv i-o (v) NJM2856_3.0v dropout voltage vs. output current 0 5 10 15 20 0 0.5 1 1.5 2 2.5 3 3.5 4 rc=0 ? rc=50k ? rc=100k ? control current : icont(ua) control voltage : vcont(v) NJM2856_3.0v control current vs. control voltage @:ta=25 o c vin=4.0v cin=0.33uf(ceramic) co=2.2uf(ceramic) io=30ma 0 0.5 1 1.5 2 2.5 3 3.5 4 00.511.522.53 rc=0 ? rc=50k ? rc=100k ? output voltage : vo(v) control voltage : vcont(v) NJM2856_3.0v output voltage vs. control voltage @:ta=25 o c vin=4.0v cin=0.33uf(ceramic) co=2.2uf(ceramic) io=30ma
8 NJM2856 ver.2008-11-12 typical characteristics -80 -70 -60 -50 -40 -30 -20 -10 0 0 200 400 600 800 1000 1200 1400 NJM2856_3.0v load regulation vs. output current load regulation : dvo/dio(mv) output current : io(ma) @:ta=25 o c vin=4.0v cin=0.33uf(ceramic) co=2.2uf(ceramic) 0 500 1000 1500 2000 2500 44.555.566.577.58 peak output current : io max (ma) NJM2856_3.0v peak output current vs. input voltage @:ta=25 o c cin=0.33uf(ceramic) co=2.2uf(ceramic) integrationtime:1ms measuredelay:1ms pulsewidth:5ms input voltage : v in (v) 0 1000 2000 3000 4000 5000 6000 0246810 quiescent current : i q (ua) NJM2856_3.0v quiescent current v.s. input voltage @:ta=25 o c output is open. cin=0.33uf(ceramic) co=2.2uf(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(uvrms) NJM2856(1a)_mold_3.0v output noise voltage vs. output current @:ta=25 o c v in =4.0v lpf:80khz co=2.2uf(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) NJM2856(1a)_mold_3.0v ripple rejection ratio vs. frequency io=0ma io=10ma io=30ma @:ta=25 o c vin=4v ein=200mvrms co=2.2uf(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) NJM2856(1a)_mold_3.0v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c v in =4v ein=200mvrms co=2.2uf(ceramic)
9 NJM2856 ver.2008-11-12 typical characteristics 0.1 1 10 100 0.001 0.01 0.1 1 10 100 10 3 0.02 output current : io(ma) @:ta=25 o c co=2.2uf(ceramic) v in =4.0v io>700ma:using cooler equivalent serise resistance : esr[ ?] NJM2856(2a)_mold_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 temperature : ta ( o c) @:io=600ma vcont=4.0v cin=0.33uf(ceramic) co=4.7uf(ceramic) NJM2856_3.0v dropout voltage v.s. temperature dropout voltage:dv i-o (v) 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage vo (v) temperature ta ( o c) NJM2856_3.0v output voltage v.s. temperature @:vin= vcont=4.0v io=30ma cin=0.33uf(ceramic) co=4.7uf(ceramic) 0 0.5 1 1.5 2 -50 0 50 100 150 control voltage : v cont(on) (v) temperature : ta ( o c) NJM2856_3.0v control voltage v.s. temperature @:v in =4.0v io=30ma cin=0.33uf(ceramic) co=2.2uf(ceramic) 0 10 20 30 40 50 60 -50 0 50 100 150 control current : icont (ua) temperature : ta ( o c) NJM2856_3.0v control current v.s. temperature @:v in =4.0v cin=0.33uf(ceramic) co=2.2uf(ceramic) vcont=4v vcont=1.6v 0 100 200 300 400 500 600 -50 0 50 100 150 quiescent current : i q (ua) temperature : ta ( o c) NJM2856_3.0v quiescent current v.s. temperature iq+icont vin=vcont=4.0v output is open cin=0.33uf(ceramic) co=2.2uf(ceramic) iq
10 NJM2856 ver.2008-11-12 typical characteristics 0 200 400 600 800 1000 -50 0 50 100 150 short circuit current : i sc (ma) temperature : ta ( o c) NJM2856_3.0v short circuit current v.s. temperature @:v in =4.0v output is short to ground. cin=0.33uf(ceramic) co=2.2uf(ceramic) -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio (%/v) temperature : ta ( o c) NJM2856_3.0v line regulation v.s. temperature @:dv in =4.0-8.0v vcont=4.0v io=30ma cin=0.33uf(ceramic) co=2.2uf(ceramic) 0 0.005 0.01 0.015 0.02 0.025 0.03 -50 0 50 100 150 load regulation : dvo/dio (%/ma) temperature : ta ( o c) NJM2856_3.0v load regulation v.s. temperature @:v in =4.0v vcont=4.0v io=0-1000ma cin=0.33uf(ceramic) co=2.2uf(ceramic) 0 600 1200 1800 2400 3000 -50 0 50 100 150 peak output current : i max (ma) temperature : ta ( o c) NJM2856_3.0v peak output current v.s. temperature @:v in =4.0v vcont=4.0v cin=0.33uf(ceramic) co=2.2uf(ceramic) md=100ms md=1ms 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage vo (v) temperature ta ( o c) NJM2856_3.0v output voltage v.s. temperature @:vin= vcont=4.0v io=30ma cin=0.33uf(ceramic) co=4.7uf(ceramic)
11 NJM2856 ver.2008-11-12 typical characteristics NJM2856_3v line transient response NJM2856_3v load transient response input voltage output voltage @: ta=25 c v in =4v co=2.2 f io=30ma 3.1 3.08 3.06 3.04 3.02 3 2.98 2.96 2.94 out p ut volta g e : vo [ v ] -2 0 -1 1 2 3 4 5 6 in p ut volta g e : v in [ v ] 0 40 80 120 160 200 time : t[ s] 0 40 80 120 160 200 time : t[ s] 3.25 3.2 3.15 3.1 3.05 3 2.95 2.9 2.85 out p ut volta g e : vo [ v ] 300 500 400 600 700 800 900 1000 1100 out p ut current : io [ ma ] output current output voltage [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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