NJM2829 - 1 - ver.2011-01-27 very low output negative voltage regulator general description package outline the NJM2829 is a negative voltage regulator that delivers up to 100ma output current with the output voltage of -0.8 to -1.3v with on/off control. advanced bipolar technology achieves low noise, high ripple rejection, and high precision voltage. it has soft-start and shunt sw function. 2.2 f output capacitor and small package can make NJM2829 suitable for portable items features ? high precision output v o 1.5% ? high ripple rejection 80db typ. (f=1khz, v o =-1.0v version ) ? output capacitor with 2.2 f ceramic capacitor ? output current i o (max)=100ma ? on/off control (positive voltage control from 0v to +5v) ? soft-start function ? shunt sw function ? built-in thermal overload protection and short circuit current limit protection ? bipolar technology ? package outline sc-88a pin connection block diagram 123 4 5 123 4 5 1. gnd 2. v in 3. v out 4. control 5. cs NJM2829f3 NJM2829f3 current limit bandgap reference output control thermal protection gnd cs control v in v out
NJM2829 - 2 - ver.2011-01-27 output voltage lank list output voltage range: -0.8v to -1.3v ababsolute maximum ratings (ta=25 c) parameter symbol ratings unit input voltage v in -14 v control voltage v cont +5 v output sink current at off-state i sink(off) 10 ma power dissipation p d 250(*1) mw operating temperature topr - 40 +85 c storage temperature tstg - 40 +125 c (*1): mounted on glass epoxy board. (114.376.21.6mm : 2layer,fr-4) operating voltage v in =-3.2 -12v electrical characteristics (v in =3.2v, v cont =3v, c in =0.1 f, co=2.2 f(vo > -0.9v :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 - 140 220 a quiescent current at off-state i q(off) v cont =0v - - 100 na output current io v o 0.9 100 130 - ma line regulation ? vo/ ? v in v in =vo-3.2v -12v, io=30ma - - 0.10 %/v load regulation ? vo/ ? io io=0 60ma - - 0.04 %/ma ripple rejection rr v in =-4.0v,ein=200mvrms,f=1khz, io=10ma,vo=-1.0v version - 80 - 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=--1.0v version - 40 - vrms cs terminal charge current ics v cs =0v 4 5.3 6.5 a output resistance at off-state r o(off) v cont =0v - 560 - ? 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 the above specification is a common spec ification for all output voltages. therefore, it may be different from the indivi dual specification for a specific output voltage. device name v out NJM2829f3 -008 -0.8v NJM2829f3 -095 -0.95v NJM2829f3 -010 -1.0v NJM2829f3 -012 -1.2v NJM2829f3 -013 -1.3v
NJM2829 - 3 - ver.2011-01-27 power dissipation vs. ambient temperature NJM2829f3 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 p d (mw) 2layers board(76.2114.31.6mm, fr-4) test circuit v in v in v out control gnd 0.1 f i q i cont v cont 2.2 f*2 i out v out v v a a 0.047 f cs (ceramic)) NJM2829 *2) vo>-0.9v version: co=4.7 f(ceramic)
NJM2829 - 4 - ver.2011-01-27 typical application 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 posi tive vcont to control terminal to make chip on. note that negative vcont does not make the chip enabled. v in v out control gnd 0.1 f 2.2 f*3 v out v in r cs control cs 0.047 f NJM2829 *3) vo>-0.9v version: co=4.7 f(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". * 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) in fluences 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.
NJM2829 - 5 - ver.2011-01-27 typical characteristics 0 0.2 0.4 0.6 0.8 1 1.2 1.6 1.8 2 2.2 2.4 2.6 2.8 3 input voltage : v in (v) NJM2829_-1.0v output voltage vs. input voltage @:ta=25 o c co=2.2uf (ceramic) io=0a io=30ma io=100ma 0 0.2 0.4 0.6 0.8 1 1.2 050100150200 @:ta=25 o c v in=-3.2v co=2.2uf(ceramic) output current : io(ma) NJM2829_-1.0v output voltage vs. output current 0 5 10 15 20 050100150 NJM2829_-1.0v ground pin current vs. output current @ ta=25c o vin=-3.2v vcont=3v co=2.2uf output current : io(ma) -80 -70 -60 -50 -40 -30 -20 -10 0 050100150200 output current : io(ma) NJM2829_-1.0v load regulation vs. output current @:ta=25 o c vin=-3.2v co=2.2uf(ceramic) 0 5 10 15 20 25 30 012345 control voltage : v cont (v) NJM2829_-1.0v control current vs. control voltage @:ta=25 o c v in=-3.2v co=2.2uf(ceramic) io=30ma rc=0 ? rc=50k ? rc=100k ? 0 0.2 0.4 0.6 0.8 1 1.2 00.511.522.53 control voltage : v con t (v) NJM2829_-1.0v output voltage vs. control voltage @:ta=25 o c v in=-3.2v co=2.2uf(ceramic) io=30ma rc=0 ? rc=50k ? rc=100k ?
NJM2829 - 6 - ver.2011-01-27 0 100 200 300 400 500 02468101214 NJM2829_-1.0v quiescent current vs. input voltage @:ta=25 o c output is open. co=2.2uf(ceramic) input voltage : v in (v) 0 50 100 150 200 250 300 2468101214 NJM2829_-1.0v peak output current vs. input voltage input voltage : v in (v) @:ta=25 o c co=2.2uf(ceramic) 0 20 40 60 80 100 120 output current : io(a) NJM2829_-1.0v output noise voltage vs. output current @:ta=25 o c vin=-3.2v co= 2.2uf(ceramic) 4.7uf(ceramic) 1u 10u 100u 1m 10m 100m flat lpf:80k 20 30 40 50 60 70 80 90 100 frequency : f (hz) NJM2829_-1.0v ripple rejection ratio vs. frequency io=0ma @:ta=25 o c vin=-3.2v ein=200mvrms co=2.2uf(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) NJM2829_-1.0v ripple rejection vs. output current f=1khz f=10khz @:ta=25 o c v in=-3.2v ein=200mvrms co=2.2uf(ceramic) 0.1 1 10 100 0.001 0.01 0.1 1 10 100 output current : io(ma) @:ta=25 o c co=2.2uf(ceramic) NJM2829_-1.0v equivalent serise resistance vs. output current stable region
NJM2829 - 7 - ver.2011-01-27 0 0.5 1 1.5 2 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v control voltage v.s. temperature @:v in =-3.2v io=30ma co=1uf(ceramic) 0 2 4 6 8 10 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v cs charge current vs. temperature @:v in =-3.2v cs is short to ground.(vi) co=2.2uf(ceramic) 0 50 100 150 200 250 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v quiescent current vs. temperature @:v in =-3.2v output is open. co=2.2uf(ceramic) icont, including -0.1 -0.05 0 0.05 0.1 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v line regulation vs. temperature @:dv in =-3.2-12v io=30ma co=2.2uf(ceramic) 0 0.005 0.01 0.015 0.02 0.025 0.03 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v load regulation vs. temperature @:v in =-3.2v io=0-60ma co=2.2uf(ceramic) 0 2 4 6 8 10 -50 0 50 100 150 NJM2829_1.0v control current vs. temperature temperature : ta ( o c) @:v in =-3.2v output : no load co=2.2uf v cont=1.6v
NJM2829 - 8 - ver.2011-01-27 0.95 0.975 1 1.025 1.05 -50 0 50 100 150 temperature ta ( o c) NJM2829_-1.0v output voltage vs. temperature @:v in =-3.2v io=30ma co=2.2uf(ceramic) 0 0.3 0.6 0.9 1.2 -50 0 50 100 150 200 temperature ta ( o c) NJM2829_-1.0v output voltage vs. temperature @:v in =-3.2v io=30ma co=2.2uf(ceramic) 0 50 100 150 200 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v short circuit current vs. temperature @:v in =-3.2v output is short to ground.(vi) co=2.2uf(ceramic) 0 50 100 150 200 -50 0 50 100 150 temperature : ta ( o c) NJM2829_-1.0v maximum output current vs. temperature @:v in =-3.2v v o=vo x 0.9 co=2.2uf(ceramic)
NJM2829 - 9 - ver.2011-01-27 [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 NJM2829_-1.0 v load transient response output voltage:vo(v) -0.90 150 output current:io(ma) -0.96 0 -0.92 100 -0.94 50 -0.98 -50 -1.00 -100 -1.02 -150 -1.04 -200 -1.06 -250 40 80 120 160 200 time:t(s) output current output voltage @:ta=25c vcont=3.2v io=50-100ma co=2.2uf(ceramic) cin=0.1uf 0 time:t(ms) 50 -2 -12 10 20 30 40 -1 -8 -0.5 -1.5 -10 0-4 1.5 2 10 NJM2829_-1.0v 4 control voltage:vcont(v) -2 -6 on/off transient response without road output voltage:vo(v) 2 0.5 control voltage output voltage @:ta=25c vcont=3.2v io=0ma co=2.2uf(ceramic) cs=0.047uf 0 NJM2829_-1.0v line transient response output voltage:vo(v) -0.88 -0.98 -1.04 -1 input voltage:vin(v) -0.90 -2 -0.92 -3 -0.94 -4 -0.96 -5 -6 -1.00 -7 -1.02 -8 -9 40 80 120 160 200 time:t(us) input voltage output voltage @:ta=25c vcont=3.0v io=30ma co=2.2uf(ceramic) cin=0uf 0 time:t(ms) 50 -2 -12 10 20 30 40 -1 -8 -0.5 0-4 1.5 2 10 NJM2829_-1.0v 4 control voltage:vcont(v) -2 -6 -1.5 -10 on/off transient response output voltage:vo(v) 2 0.5 control voltage output voltage @:ta=25c vcont=3.2v io=30ma co=2.2uf(ceramic) cs=0.047uf
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