NJM2827 - 1 - ver.2010-07-13 negative output low dr op out voltage regulator ? general description ? package outline the NJM2827 is a negative output low dropout regulator. advanced bipolar technology achi eves 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 NJM2827 suitable for portable items. ? features z low dropout voltage :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 1.0 f ceramic capacitor. z output current :io(max.)=100ma 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 current limit bandgap reference thermal protection gnd cs v in v out NJM2827f3-xx NJM2827f3 1.gnd 2.v in 3.v out 4.nc 5.cs 1 2 3 4 5
NJM2827 - 2 - ver.2010-07-13 ? output voltage rank list output voltage options available: -1.5 ~ -10.0v ? absolute maximum ratings (ta=25c) parameter symbol ratings unit input voltage v in -14 v power dissipation p d 250(*1) mw operating temperature topr ? 40 +85 c storage temperature tstg ? 40 +125 c (*1): mount on eia/jedec standard test board (76.2*114.3*1.6mm, 2layers, 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, c in =0.1 f, c o = 1 . 0 f, ta = 2 5 c) (vo -2.2v version: v in =-3.2v, 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 - 130 200 a output current io v o +0.3v 100 130 - ma line regulation ? vo/ ? v in v in =vo-1v -12v(v o < -2.2v) v in =-3.2v -12v(v o -2.2v) 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 v in =vo-1v -12v(v o -3.0v) v in =-4.0v -12v(v o > -3.0v) 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 voltage v no f=10hz 80khz, io=10ma, vo=-7v version - 100 - vrms cs terminal charge current ics v cs =0v 4 5 6 a input voltage v in -12 - - v (*2): excludes vo>-3.0v version. the above specification is a common spec ification for all output voltages. therefore, it may be different from the indi vidual specification for a specific output voltage. device name v out NJM2827f3 -14 -1.4v NJM2827f3 -15 -1.5v NJM2827f3 -05 -5.0v NJM2827f3 -06 -6.0v NJM2827f3 -07 -7.0v NJM2827f3 -75 -7.5v NJM2827f3 -08 -8.0v njm2829f3 -10 -10.0v
NJM2827 - 3 - ver.2010-07-13 ? test circuit NJM2827 v in v in v out gnd 0.1f i q 1.0f *3 i out v out v cs=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)
NJM2827 - 4 - ver.2010-07-13 ? typical applications NJM2827 v in v out gnd 0.1f v out v in cs cs cs=0.047f 1.0f *4 *4 -2.2v vo -2.0v version: co=2.2 f(ceramic) vo>-2.0v version: co=4.7 f(ceramic) (ceramic) ? 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. ? 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 capacitanc e 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.
NJM2827 - 5 - ver.2010-07-13 ? 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 inrush peak current=150ma(cs=open) inrush peak current=20ma(cs=0.0047 f) ? this characteristic is one example. it is necessary to examine the characteristic with an actual circuit because there is an influence by the characteri stic such as output voltage/output capacitor. vin=v o -1v cin=0.1 f(ceramic) co=1 f(ceramic) io=0ma vin=v o -1v cin=0.1 f(ceramic) co=1 f(ceramic) io=0ma inrush current inrush current 50ma/div 20ma/div output voltage out p ut volta g e
NJM2827 - 6 - ver.2010-07-13 ? power dissipation vs. ambient temperature NJM2827f3 power dissipation (topr= -40 ~ +85c,tj=125c) 0 100 200 300 400 500 -50 -25 0 25 50 75 100 ambient temperature ta(c) power dissipation 2layers board(76.2114.31.6mm, fr-4)
NJM2827 - 7 - ver.2010-07-13 ? typical chracteristics 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 input voltage : v in (v) NJM2827/-7.0v output voltage vs. input voltage @:ta=25 o c co=1.0uf (ceramic) io=0a io=30ma io=100ma 0 1 2 3 4 5 6 7 8 0 50 100 150 200 NJM2827/-7.0v output voltage vs. output current @:ta=25 o c v in=-8.0v co=1.0uf(ceramic) output current : io(ma) 0 5 10 15 20 050100150 NJM2827/-7.0v ground pin current v.s. output current @:ta=25 o c vin=-8.0v co=1.0uf(ceramic) output current : i o (ma) 0 0.05 0.1 0.15 0.2 0.25 0.3 050100150 output current:io(ma) @:ta=25 o c co=1.0uf(ceramic) NJM2827/-7.0v dropout voltage vs. output current -80 -70 -60 -50 -40 -30 -20 -10 0 050100150200 output current : io(ma) NJM2827/-7.0v load regulation vs. output current @:ta=25 o c vin=-8.0v co=1.0uf(ceramic) 0 50 100 150 200 8 9 10 11 12 13 14 NJM2827/-7.0v peak output current vs. input voltage @:ta=25 o c co=1.0uf(ceramic) input voltage : v in (v)
NJM2827 - 8 - ver.2010-07-13 0 500 1000 1500 2000 02468101214 NJM2827/-7.0v quiescent current vs. input voltage @:ta=25 o c output is open. co=1.0uf(ceramic) input voltage : v in (v) 0 20 40 60 80 100 120 output current : io(a) NJM2827/-7.0v output noise voltage vs. output current @:ta=25 o c vin=-8.0v co=1.0uf 1u 10u 100u 1m 10m 100m lpf:80k 20 30 40 50 60 70 80 90 100 frequency : f (hz) NJM2827/-7.0v ripple rejection ratio vs. frequency io=0ma @:ta=25 o c v in=-8.0v ein=200mvrms co=1.0uf(ceramic) 10 100 1k 10k 100k io=30ma io=100ma 20 30 40 50 60 70 80 90 100 0.001 0.01 0.1 1 10 100 output current : io(ma) NJM2827/-7.0v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c vin=-8.0v ein=200mvrms co=1.0uf(ceramic) 0.01 0.1 1 10 100 0.001 0.01 0.1 1 10 100 output current : io(ma) @:ta=25 o c co=1.0uf(ceramic) NJM2827/-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 temperature : ta ( o c) @:io=60ma co=1uf(ceramic) NJM2827/-7.0v dropout voltage vs. temperature
NJM2827 - 9 - ver.2010-07-13 6.8 6.9 7 7.1 7.2 -50 0 50 100 150 temperature ta ( o c) NJM2827/-7.0v output voltage vs. temperature @:v in =-8.0v io=30ma co=1.0uf(ceramic) 0 2 4 6 8 10 -50 0 50 100 150 temperature : ta ( o c) njm2828/-7.0v cs charge current v.s. temperature @:v in =-8.0v cs is short to ground. co=1.0uf(ceramic) 0 50 100 150 200 250 -50 0 50 100 150 temperature : ta ( o c) NJM2827/-7.0v quiescent current vs. temperature @:v in =-8.0v output is open. co=1.0uf(ceramic) -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 temperature : ta ( o c) NJM2827/-7.0v line regulation vs. temperature @:dv in =-8-12v io=30ma co=1.0uf(ceramic) 0 0.005 0.01 0.015 0.02 0.025 0.03 -50 0 50 100 150 temperature : ta ( o c) NJM2827/-7.0v load regulation vs. temperature @:v in =-8.0v io=0-60ma co=1.0uf(ceramic) 0 2 4 6 8 -50 0 50 100 150 200 temperature ta ( o c) NJM2827/-7.0v output voltage v.s. temperature @:v in =-8.0v io=30ma co=1.0uf(ceramic)
NJM2827 - 10 - ver.2010-07-13 [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. 0 50 100 150 200 -50 0 50 100 150 temperature : ta ( o c) NJM2827/-7.0v short circuit current vs. temperature @:v in =-8.0v output is short to ground. co=1.0uf(ceramic) 0 time:t(ms) -14 0.4 0.8 1.2 1.6 2 -11 -7.00 -12 -7.02 -13 -6 input voltage:vin(v) -6.90 -7 -6.92 -8 -6.94 -9 -6.96 -10 NJM2827_-7.0v output voltage:vo(v) -6.88 -6.98 -7.04 line transient response input voltage output voltage @ta:25c io=30ma co=1.0uf 0 NJM2827_-7.0v load transient response output voltage:vo(v) -6.90 150 output current:io(ma) -6.96 0 -7.04 -200 -6.92 100 -6.94 50 -6.98 -50 -7.00 -100 -7.02 -150 -7.06 -250 40 80 120 160 200 time:t(s) output current output voltage @ta:25c vin=-8v co=1.0uf
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