njm2871/a , njm2872/a -1- ver.2007-01-06 low dropout voltage regulator general description package outline the njm2871/a, njm2872/a are low dropout voltage regulators designed for cellular phone application. advanced bipolar technology achieves low noise, high ripple rejection and low quiescent current. features high ripple rejection 70db typ. (f=1khz,vo=3v version) output noise voltage vno=30 vrms typ.(cp=0.01 f) output capacitor with 1.0uf ceramic capacitor (vo 2.7v) output current io(max.)=150ma high precision output vo 2% vo 1%:a version low dropout voltage 0.10v typ. (io=60ma) on/off control (active high) operating voltage range +2.5v +14v (vo 2.0v version) internal short circuit current limit internal thermal overload protection bipolar technology package outline sot-23-5 pin configuration njm2871f/af njm2872f/af equivalent circuit v out gnd v in thermal protection bandgap reference noise bypass cont njm2871f/af njm2872f/af pin function 1. control (active high) 2. gnd 3. noise bypass 4. v out 5. v in pin fun c tion 1.v in 2.gnd 3.control (active high) 4.noise bypass 5.v out 123 4 5 123 4 5 123 4 5 123 4 5
njm2871/a , njm2872/a - 2 - ver.2007-01-06 absolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in +14 v control voltage v cont +14(*1) v 350(*2) power dissipation p d sot-23-5 200(*3) mw operating temperature to p r ? 40 +85 c storage temperature ts t g ? 40 +125 c (*1): when input voltage is less than +14v, the absolute maximum control voltage is equal to the input voltage. (*2): mounted on glass epoxy board based on eia/jedec. (114.3x76.2x1.6mm: 2layers) (*3): device itself. operating voltage v in =+2.5 +14v (in case of vo<2.1v version) electrical characteristics (vo>2.0v version : v in =vo+1v, c in =0.1 f, co=1.0 f: vo 2.7v (co=2.2 f: vo 2.6v), cp=0.01 f, ta =2 5 c) parameter symbol test condition min. typ. max. unit io=30ma -2% ? +2% v output voltage vo io=30ma, a version -1% ? +1% v quiescent current i q io=0ma, expect icont ? 120 180 a quiescent current at control off i q(off) v cont =0v ? ? 100 na output current io vo ? 0.3v 150 200 - ma line regulation ? vo/ ? v in v in =vo+1v vo+6v, io=30ma ? ? 0.10 %/v load regulation ? vo/ ? io io=0 100ma ? ? 0.03 %/ma dropout voltage ? v i ? o io=60ma ? 0.10 0.18 v ripple rejection rr ein=200mvrms,f=1khz, io=10ma vo=3v version ? 70 ? db average temperature coefficient of output voltage ? vo/ ? ta ta = 0 85 c, io=10ma, vo=3v version ? 50 ? ppm/c output noise voltage v no f=10hz 80khz, io=10ma, vo=3v version ? 30 ? vrms control voltage for on-state v cont(on) 1.6 ? ? v control voltage for off-state v cont(off) ? ? 0.6 v
njm2871/a , njm2872/a - 3 - ver.2007-01-06 (vo 2.0v version : v in =vo+1v, c in =0.1 f, co=4.7 f, cp=0.01 f, ta = 2 5 c) parameter symbol test condition min. typ. max. unit io=30ma -2% ? +2% v output voltage vo io=30ma, a version -1% ? +1% v quiescent current i q io=0ma, expect icont ? 120 180 a quiescent current at control off i q(off) v cont =0v ? ? 100 na output current io vo ? 0.3v 150 200 - ma line regulation ? vo/ ? v in v in =vo+1v vo+6v, io=30ma ? ? 0.10 %/v load regulation ? vo/ ? io io=0 100ma ? ? 0.03 %/ma ripple rejection rr ein=200mvrms,f=1khz, io=10ma vo=1.8v version ? 75 ? db average temperature coefficient of output voltage ? vo/ ? ta ta = 0 85 c, io=10ma, vo=1.8v version ? 50 ? ppm/c output noise voltage v no f=10hz 80khz, io=10ma, vo=1.8v version ? 22 ? vrms control voltage for on-state v cont(on) 1.6 ? ? v control voltage for off-state v cont(off) ? ? 0.6 v 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. output voltage rank list device name v out device name v out device name v out njm287 15 1.5v njm287 285 2.85v njm287 355 3.55v njm287 18 1.8v njm287 29 2.9v njm287 38 3.8v njm287 21 2.1v njm287 03 3.0v njm287 04 4.0v njm287 23 2.3v njm287 31 3.1v njm287 45 4.5v njm287 25 2.5v njm287 32 3.2v njm287 46 4.6v njm287 26 2.6v njm287 33 3.3v njm287 47 4.7v njm287 27 2.7v njm287 34 3.4v njm287 05 5.0v njm287 28 2.8v njm287 35 3.5v test circuit v in v in v out control noise bypass gnd 0.1 f i in i cont v cont cp=0.01 f i out v out v v a a (ceramic) 1.0 f *4 * 4 2.0v < vo 2.6v version : co=2.2 f(ceramic) vo 2.0v version : co=4.7 f(ceramic)
njm2871/a , njm2872/a - 4 - ver.2007-01-06 typical application 1 in case that on/off control is not required: v in v out control noise bypass gnd 0.1 f cp=0.01 f v out v in r (0 300k ? ) 1.0 f *5 *5 2.0v < vo 2.6v version : co=2.2 f vo 2.0v version : co=4.7 f connect control terminal to v in terminal 2 in use of on/off control: v in v out control noise bypass gnd 0.1 f cp=0.01 f v out v in r 1.0 f *5 *5 2.0v < vo 2.6v version : co=2.2 f vo 2.0v version : co=4.7 f state of control terminal: ? ?h? output is enabled. ? ?l? or ?open? output is disabled. noise bypass capacitance cp noise bypass capacitance cp reduces noise generated by band-gap reference circuit. noise level and ripple rejection will be improved when larger cp is used. use of smaller cp value may cause oscillation. use the cp value of 0.01 f greater to avoid the problem. 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.
njm2871/a , njm2872/a - 5 - ver.2007-01-06 electrical characteristics
njm2871/a , njm2872/a - 6 - ver.2007-01-06 electrical characteristics
njm2871/a , njm2872/a -7- ver.2007-01-06 electrical characteristics 0 2 4 6 8 10 -50 0 50 100 control current : i cont ( a) temperat ure ta ( o c) njm 2871_3.0v control current v.s. temperature @:v in =4v output is open. co=1 f(ceramic) cp=0.01 f v cont =1.6v
njm2871/a , njm2872/a - 8 - ver.2007-01-06 [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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