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| Datasheet File OCR Text: |
| NJM2828 -1- ver.2007-02-23 negative output low drop out voltage regulator ? general description ? package outline the NJM2828 is a negative output low dropout regulator. advanced bipolar technology achieves low noise, high precision voltage and high ripple rejection. it has soft-start and shunt sw function. 1.0 f output capacitor and small package can make NJM2828 suitable for portable items. ? features z low current consumption 0.13v (typ.) @io=60ma z high precision output 1.5% z high ripple rejection 65db(typ.) @f=1khz, vo=-7v version z output capacitor with 0.1f ceramic capacitor. z output current io(max.)=100ma z on/off control(positive voltage control from 0 to +5v) z soft-start function z shunt sw function z internal thermal overload protection z internal short circuit current limit z bipolar technology z package outline sc88a ? pin configuration ? equivalent circuit v out gnd v in thermal protection bandgap reference control current limit output control cs NJM2828f3-xx sc88a NJM2828f3 1.gnd 2.v in 3.v out 4.control 5.cs 1 2 3 4 5
NJM2828 - 2 - ver.2007-02-23 ? output voltage rank list device name v out device name v out NJM2828f3-15 -1.5v NJM2828f3-06 -6.0v NJM2828f3-02 -2.0v NJM2828f3-63 -6.3v NJM2828f3-03 -3.0v NJM2828f3-07 -7.0v NJM2828f3-04 -4.0v NJM2828f3-75 -7.5v NJM2828f3-05 -5.0v NJM2828f3-08 -8.0v NJM2828f3-51 -5.1v *NJM2828f3-85 -8.5v NJM2828f3-55 -5.5v NJM2828f3-10 -10.0v output voltage options available : -1.5 ~ -10.0v (0.1v step) NJM2828 - 3 - ver.2007-02-23 ? absolute maximum ratings (ta=25c) parameter symbol ratings unit input voltage v in -14 v control voltage v cont +5 v power dissipation p d 250(*1) mw operating temperature to p r ? 40 +85 c storage temperature tstg ? 40 +125 c output sink current at off-state i sink(off) 10 ma (*1): mounted on glass epoxy board. (114.376.21.6mm : 2layer,fr-4) ? operating voltage v in =-3.2 -12v (in case of vo>-3.0v version) ? electrical characteristics (vo<-2.2v version: v in =vo-1v, v cont =3v, c in =0.1 f, co=1.0 f, ta = 2 5 c) (vo -2.2v version: v in =-3.2v, v cont =3v, c in =0.1 f, c o =2 . 2 f(vo>-2.0v: co=4.7 f), ta=25 c) parameter symbol test condition min. typ. max. unit output voltage vo io=30ma +1.5% - -1.5% v quiescent current i q io=0ma, except icont - 130 200 a quiescent current at off-state i q(off) v cont =0v - - 100 na output current io v o +0.3v 100 130 - ma line regulation ? vo/ ? v in v in =vo-1v -12v, io=30ma - - 0.10 %/v load regulation ? vo/ ? io io=0 60ma - - 0.03 %/ma dropout voltage(*2) ? v i_o io=60ma - 0.13 0.23 v ripple rejection rr ein=200mvrms, f=1khz, io=10ma vo=-7v version - 65 - db average temperature coefficient of output voltage ? vo/ ? ta ta = 0 85c, io=10ma - 50 - ppm/c output noise voltage1 v no f=10hz 80khz, io=10ma, vo=-7v version - 100 - vrms cs terminal charge current ics v cs =0v 4 5 6 a output resistance at off-state r o(off) v cont =0v, vo=-7v version - 360 - ? control current i cont v cont =1.6v - 2 4 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 -12 - - v (*2):excludes vo>-3.0v version. 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. NJM2828 - 4 - ver.2007-02-23 ? test circuit 2828 v in v in v out control gnd 0.1f i q i cont v cont 1.0f *3 i out v out v v a 0.047f cs a *3 -2.2v vo< -2.0v version : co=2.2 f(ceramic) vo -2.0v version : co=4.7 f(ceramic) (ceramic) NJM2828 - 5 - ver.2007-02-23 ? typical applications ? on/off control on/off control can be achieved by applying positive control voltage to control terminal. apply positive vcont ("h") to make chip to be on (enabled), and either vcont is "l" or open (high z) to make chip to be off (disabled). the relations between vcont and the state is as follows: vcont +1.6v vcont +5v ("h" level): on state vcont 0v vcont +0.6v ("l" level): off state vcont +0.6v < vcont < +1.6v ("l" level): undefined in case on/off control is not used, keep applying positive vcont to control terminal to make chip on. note that negative vcont does not make the chip enabled. 2828 v in v out control gnd 0.1f v out v in r cs control cs cs=0.047f *4 -2.2v vo< -2.0v version : co=2.2 f vo -2.0v version : co=4.7 f 1.0f *4 (ceramic 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. ? input capacitance c in input capacitance c in is required to prevent oscillation and reduce power supply ripple for applications with high power supply impedance or a long power supply line. use the c in value of 0.1 f greater to avoid the problem. c in should connect between gnd and v in as short as possible. NJM2828 - 6 - ver.2007-02-23 ? output capacitance c o output capacitor (co) is required for a phase compensation of the internal error amplifier. the capacitance and the equivalent series resistance (esr) influences stability of the regulator. this product is designed to work with a low esr capacitor for the co; however, use of recommended capacitance or greater value is essential for stable operation. use of a smaller co may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. therefore, use co with the recommended capacitance or greater value and connect between vo terminal and gnd terminal with minimal wiring. the recommended capacitance depends on the output voltage. low voltage regulator requires greater value of the co. thus, check the recommended capacitance for each output voltage. use of a greater co reduces output noise and ripple output, and also improves transient response of the output voltage against rapid load change. NJM2828 -7- ver.2007-02-23 ? soft-start function capacitance cs connect between cs pin and gnd for the following. ? control at risetime of output voltage. ? reduces inrush current at output on. when the soft start function is not used, cs pin should be open. 1.cs capacitance vs risetime of output voltage calculation : risetime of output voltage ? t ? 213 x cs( f) 0 50 100 150 200 250 0 0.2 0.4 0.6 0.8 1 1.2 cs capacity vs risetime of output voltage risetime of output voltage : ? ? ? ? t (ms) cs capacity : cs( f) @:ta=25 o c v in =6 v c in =0 .1 f co=1 f(ceramic) io=0ma 2.inrush current at control on the peak value of the inrush current can be limited according to the capacitance of the cs. inrush current wave : cs=0 f(open) : i peak =150 a cs=0.0047 f : i peak =20 a ? this characteristic is one example. it is necessary to examine the characteristic with an actual circuit because there is an influence by the characteristic such as output voltage/output capacitor. vin=vo-1v cin=0.1 f(ceramic) co=1 f(ceramic) io=0ma vin=vo-1v cin=0.1 f(ceramic) co=1 f(ceramic) io=0ma inrush current inrush current output voltage out p ut volta ge control on control on 50ma/div 20ma/div NJM2828 - 8 - ver.2007-02-23 ? power dissipation vs. ambient temperature NJM2828f3 power dissipation (topr=-40 +85 ,tj=125 ) 0 100 200 300 400 500 -50 -25 0 25 50 75 100 ambient temperature ta( ) power dissipation p d (mw) on board(114.376.21.6mm, fr-4) NJM2828 - 9 - ver.2007-02-23 ? electrical characteristics 6.7 6.8 6.9 7 7.1 7.2 6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 7.5 output voltage : vo(v) input voltage : v in (v) NJM2828/-7.0v output voltage vs. input voltage @:ta=25 o c co=1.0 f (ceramic) io=0a io=30ma io=100ma 0 1 2 3 4 5 6 7 8 0 50 100 150 200 output voltage : vo(v) NJM2828/-7.0v output voltage vs. output current @:ta=25 o c v in =-8.0v co =1 .0 f(ceramic) output current : io(ma) 0 2 4 6 8 10 0 20406080100120 ground pin current : i gn d (ma) NJM2828/-7.0v ground pin current v.s. output current @:ta=25 o c v in =-8.0v co=1.0 f(ceramic) output current : i o (ma) 0 0.05 0.1 0.15 0.2 0.25 0.3 0 20406080100120 output current:io(ma) @:ta=25 o c co =1.0 f(ceramic) vcont=3.0v dropout voltage:dv i-o (v) NJM2828/-7.0v dropout voltage vs. output current 0 5 10 15 20 25 30 012345 control current : i cont ( a) control voltage : v co nt (v) NJM2828/-7.0v control current vs. control voltage @:ta=25 o c v in =-8.0v co=1.0 f(ceramic) io=30ma rc=0 ? rc=50k ? rc=100k ? 0 1 2 3 4 5 6 7 8 00.511.522.53 output voltage : vo(v) control voltage : v co nt (v) NJM2828/-7.0v output voltage vs. control voltage @:ta=25 o c v in =-8.0v co=1.0 f(ceramic) io=30ma rc=0 ? rc=50k ? rc=100k ? NJM2828 - 1 0 - ver.2007-02-23 ? electrical characteristics -60 -50 -40 -30 -20 -10 0 0 20406080100120 load regulation : dvo/dio(mv) output current : io(ma) NJM2828/-7.0v load regulation vs. output current @:ta=25 o c v in =-8.0v co=1.0 f(ceramic) 0 50 100 150 200 8 9 10 11 12 13 14 peak output current : io max (ma) NJM2828/-7.0v peak output current vs. input voltage @:ta=25 o c co=1.0 f(ce ra mic) vc ont=3.0v input voltage : v in (v) 0 500 1000 1500 2000 02468101214 quiescent current : i q ( a) NJM2828/-7.0v quiescent current v.s. input voltage @:ta=25 o c output is open. co=1.0 f(ceramic) vcont=3.0v input voltage : v in (v) 0 20 40 60 80 100 120 output current : io(ma) output noise voltage : vn( vrms) NJM2828/-7.0v output noise voltage vs. output current @:ta=25 o c v in =- 8.0 v co =1 .0 f 0.001 0.01 0.1 110 100 lpf:80k flat 20 30 40 50 60 70 80 90 100 10 100 1000 10 4 10 5 ripple rejection ratio : rr (db) frequency : f (hz) NJM2828/-7.0v ripple rejection ratio v.s. frequency io=0ma @:ta=25 o c v in =- 8.0 v ein=200mvrms co=1.0 f(ceramic) 10 100 1k 10k 100k io=30ma io=100ma 20 30 40 50 60 70 80 90 10 0 0.001 0.01 0.1 1 10 100 output current : io(ma) ripple rejection : rr (db) NJM2828/-7.0v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c v in =-8.0v ein=200mvrms co=1.0 f( cera mic) NJM2828 -11- ver.2007-02-23 ? electrical characteristics 0.01 0.1 1 10 10 0 0.001 0.01 0.1 1 10 100 output current : io(ma) @:ta=25 o c co=1.0 f( cera mic) equivalent serise resistance : esr( ? ? ? ? ) NJM2828/-7.0v equivalent serise resistance vs. output current stable region 0 0.05 0.1 0.15 0.2 0.25 0.3 -50 0 50 100 150 temperat ure : ta ( o c) @:io=60ma co=1 f(ce ra mic) NJM2828/-7.0v dropout voltage v.s. temperature dropout voltage:dv i-o (v) 0 0.5 1 1.5 2 -50 0 50 100 150 control voltage : v cont(on) (v) temperature : ta ( o c) NJM2828/-7.0v control voltage v.s. t em perature @:v in =- 8.0 v io=30ma co=1.0 f(ceramic) 6.8 6.9 7 7.1 7.2 -50 0 50 100 150 output voltage vo (v) temperat ure ta ( o c) NJM2828/-7.0v output voltage v.s. temperature @:v in =-8.0v io=30ma co=1.0 f(ceramic) 0 2 4 6 8 10 -50 0 50 100 150 cs charge current : i cs ( a) temperature : ta ( o c) NJM2828/-7.0v cs charge current v.s. temperature @:v in =-8.0v cs is short to ground. co =1.0 f(ceramic) 0 50 100 150 200 250 -50 0 50 100 150 quiescent current : i q ( a) temperature : ta ( o c) NJM2828/-7.0v quiescent current v.s. temperature @:v in =-8.0v output is open. co =1 .0 f(ceramic) iq+icont iq NJM2828 - 12 - ver.2007-02-23 ? electrical characteristics -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 line regulation : dvo/dio (%/v) temperat ure : ta ( o c) NJM2828/-7.0v line regulation v.s. temperature @:dv in =-8-12v io=30ma co=1.0 f(ceramic) 0 0.005 0.01 0.015 0.02 0.025 0.03 -50 0 50 100 150 load regulation : dvo/dio (%/ma) temperat ure : ta ( o c) NJM2828/-7.0v load regulation v.s. temperature @:v in =-8.0v io=0-60ma co=1.0 f(ceramic) 0 2 4 6 8 -50 0 50 100 150 200 output voltage vo (v) temperat ure ta ( o c) NJM2828/-7.0v output voltage v.s. temperature @:v in =-8.0v io=30ma co=1.0 f(ceramic) 0 50 100 150 200 -50 0 50 100 150 short circuit current : i sc (ma) temperature : ta ( o c) NJM2828/-7.0v short circuit current v.s. temperature @:v in =-8.0v output is short to ground. co =1 .0 f(ceramic) NJM2828 -1 3 - ver.2007-02-23 ? electrical characteristics -7.04 -7.02 -7 -6.98 -6.96 -6.94 -6.92 -6.9 -6.88 -14 -13 -12 -11 -10 -9 -8 -7 -6 0 0.4 0.8 1.2 1.6 2 NJM2828_-7.0v line transient response output voltage : vo [v] time : t [ms] input voltage output voltage @:ta=25 o c v dd =-8.0v co=1.0 f(ce ramic) io=30ma input voltage : v in [v ] -7.06 -7.04 -7.02 -7 -6.98 -6.96 -6.94 -6.92 -6.9 -250 -200 -150 -100 -50 0 50 100 150 0 40 80 120 160 200 NJM2828_-7.0v load transient response outp ut vo lta ge : vo [v] time : t [ s] output current output voltage @:ta =2 5 o c v dd =-8.0v co=1.0 f(ceramic) output current : io [ma] -10 -8 -6 -4 -2 0 2 4 6 -12 -10 -8 -6 -4 -2 0 2 4 0 1020304050 NJM2828_-7.0v on/off transi ent response w ithout load output voltage : vo [v] contr ol v oltage : v o [v] time : t [ms] control voltage output vo ltage @:ta=25 o c v dd =-8.0v co=1.0 f(ce rami c) cs=0.047 f io=0ma NJM2828 - 14 - ver.2007-02-23 [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 ri g hts. |
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