1 njm2855 ver.2012-10-24 low dropout voltage regulator ? general description ? package outline the njm2855 is a 3-terminal low dropout voltage regulator. 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 njm2855 is suitable for va rious applications such as portable / consumer devices. ? features z high ripple rejection 75db ty p. (f=1khz,vo=3v version) z output noise voltage vno=45vrms typ. z output capacitor with 2.2 f ceramic capacitor (vo 2.7v) z output current io (max.)=1a z high precision output vo 1.0% z low dropout voltage 0.20v typ. (io=600ma) z internal short circuit current limit z internal thermal overload protection z bipolar technology z package outline to-252-3 ? pin configuration ? equivalent circuit v out thermal protection bandgap reference v in gnd njm2855dl1 pin function 1.v in 2.gnd 3.v out njm2855dl1 3 1 2
2 njm2855 ver.2012-10-24 ? output voltage rank list the white column shows applicable voltage rank(s) device name v out device name v out njm2855dl1-15 1.5v njm2855dl1-35 3.5v njm2855dl1-16 1.6v njm2855dl1-36 3.6v njm2855dl1-17 1.7v njm2855dl1-37 3.7v njm2855dl1-18 1.8v njm2855dl1-38 3.8v njm2855dl1-19 1.9v njm2855dl1-39 3.9v njm2855dl1-02 2.0v njm2855dl1-04 4.0v njm2855dl1-21 2.1v njm2855dl1-41 4.1v njm2855dl1-22 2.2v NJM2855DL1-42 4.2v njm2855dl1-23 2.3v njm2855dl1-43 4.3v njm2855dl1-24 2.4v njm2855dl1-44 4.4v njm2855dl1-25 2.5v njm2855dl1-45 4.5v njm2855dl1-26 2.6v njm2855dl1-46 4.6v njm2855dl1-27 2.7v njm2855dl1-47 4.7v njm2855dl1-28 2.8v njm2855dl1-48 4.8v njm2855dl1-29 2.9v njm2855dl1-49 4.9v njm2855dl1-03 3.0v njm2855dl1-05 5.0v njm2855dl1-31 3.1v njm2855dl1-32 3.2v njm2855dl1-33 3.3v njm2855dl1-34 3.4v
3 njm2855 ver.2012-10-24 ? absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +10 v power dissipation p d 1190(*1) 3125(*2) mw operating temperature topr -40 +85 c storage temperature tstg -40 +150 c (*1): mounted on glass epoxy board. (76.2 114.3 1.6mm:based on eia/jdec standard size, 2layers, cu area 100mm 2 ) (*2): 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) ? 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(*3) ? v i ? o io=600ma - 0.20 0.28 v ripple rejection rr ein=200mvrms,f=1khz, io=10ma vo=3.0v version(*4) - 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 input voltage v in - - 8 v (*3): the output voltage excludes under 2.1v. (*4): 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 njm2855 ver.2012-10-24 ? power dissipation vs. ambient temperature ? test circuit njm2855 v in v in v out gnd 0.33f i in i out v o u v a (ceramic) 2.2f *5 *5 1.7v 5 njm2855 ver.2012-10-24 *input capacitor c in input capacitor c in is required to prevent oscillation and redu ce power 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 oscillat ion 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 should connect between gnd and v out as shortest path as possible for stable operation the recommended capacitance depends on the output voltage rank. especially, low voltage regulator requires larger c o value. in addition, you should consider varied characteristics of capaci tor (a frequency characteristic, a temperature characteristic, a dc bi as characteristic and so on) and unevenness peculiar to a capacitor supplier enough. when selecting c o, recommend that have withstand voltage ma rgin against output voltage and superior temperature characteristic though this product is designed stability wo rks with wide range esr of capacitor including low esr products.
6 njm2855 ver.2012-10-24 ? 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) njm2855_3.0v output voltage vs. input voltage @:ta=25 o c co=2.2 f(ceramic ) io=0a io=100ma io=500ma io=1a 0 0.5 1 1.5 2 2.5 3 3.5 4 0 500 1000 1500 2000 output voltage : vo(v) njm2855_3.0v output voltage vs. output current @:ta=25 o c v in =4v co=2.2 f(ceramic) output current : io(ma) 0 5 10 15 20 25 30 35 0 200 400 600 800 1000 1200 ground pin current : i gn d (ma) njm2855_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 0.4 0 200 400 600 800 1000 1200 1400 output current:io(ma) @:ta=25 o c co=2.2 f (ceramic) dropout voltage:dv i-o (v) njm2855_3.0v dropout voltage vs. output current -80 -70 -60 -50 -40 -30 -20 -10 0 0 200 400 600 800 1000 1200 1400 load regulation : dvo/dio(mv) output current : io(ma) njm2855_3.0v load regulation vs. output current @:ta=25 o c v in =4.0v co=2.2 f(ceramic) 0 500 1000 1500 2000 2500 45678 peak output current : io max (ma) njm2855_3.0v peak output current vs. input voltage @:ta=25 o c co=2.2 f(ceramic) input voltage : v in (v)
7 njm2855 ver.2012-10-24 ? typical characteristics 0 1000 2000 3000 4000 5000 6000 012345678 quiescent current : i q (ua) njm2855_3.0v quiescent current vs. input voltage @:ta=25 o c output is open. co=2.2 f(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) njm2855_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 1k 10k 100 njm2855_3.0v ripple rejection ratio vs. frequency ripple rejection ratio : rr (db) frequency : f (hz) io=10ma io=0ma io=30ma io=100ma @: ta=25 o c v in =4v ein=200mvrms co=2.2 f(ceramic) 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) njm2855_3.0v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c v in =4v ein=200mvrms co=2.2 f(ceramic) 0.02 0.1 1 10 100 0.001 0.01 0.1 1 10 100 10 3 output current : io(ma) @:ta=25 o c co=2.2 f(ceramic) v in =4v equivalent serise resistance : esr( ? ) njm2855_3.0v equivalent serise resistance vs. output current stable region v in =4v
8 njm2855 ver.2012-10-24 ? typical characteristics 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 -50 0 50 100 150 io=600ma co=2.2 f(ceramic) dropout voltage:dv i-o (v) njm2855_3.0v dropout voltage vs. temperature temperature : ta ( o c) 2.9 2.95 3 3.05 3.1 -50 0 50 100 150 output voltage : vo(v) njm2855_3.0v output voltage vs. temperature @:v in =4.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 0 100 200 300 400 500 600 -50 0 50 100 150 quiescent current : i q (ua) njm2855_3.0v quiescent current v.s. input voltage @:v in =4.0v output is open. co=2.2 f (ceramic) temperature : ta ( o c) 0 200 400 600 800 1000 -50 0 50 100 150 short circuit current : isc (ma) njm2855_3.0v short circuit current v.s. temperature @:v in =4.0v co=2.2 f (ceramic) output is short to ground. temperature : ta ( o c) -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio(%/v) njm2855_3.0v line regulation vs. temperature @:v in =4.0-8.0v 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(%/ma) njm2855_3.0v load regulation vs. temperature @:v in =4.0v io=0-1000ma co=2.2 f (ceramic) temperature : ta ( o c)
9 njm2855 ver.2012-10-24 ? typical characteristics 0 0.5 1 1.5 2 2.5 3 3.5 4 -50 0 50 100 150 200 output voltage : vo(v) njm2855_3.0v output voltage vs. temperature @:v in =4.0v io=30ma co=2.2 f (ceramic) temperature : ta ( o c) 2.94 2.96 2.98 3 3.02 3.04 3.06 3.08 3.1 -2 -1 0 1 2 3 4 5 6 0 40 80 120 160 200 njm2855_3v line transient response output voltage : vo [v] input voltage : v in [v] time : t [ s] input voltage output voltage @:ta=25 o c v in =4 v co =2 .2 f io=30ma 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 3.25 300 400 500 600 700 800 900 1000 1100 04080120160200 njm2855_3v load transient response output voltage : vo [v] output current : io [ma] time : t [ s] output current output voltage @:ta=25 o c v in =4v co=2.2 f [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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