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r1121n series low noise 150ma ldo regulator no.ea-058-111026 1 outline the r1121n series are cmos-based voltage regulator ics with high output voltage accuracy, extremely low supply current, low on-resistance, and high ripple rejection. each of these voltage regulator ics consists of a voltage reference unit, an error amplifier, resistor s, a current limit circuit, and a chip enable circuit. these ics perform with low dropout voltage and a chip enable function. the line transient response and load transient response of the r1121n series are excellent, t hus these ics are very suitable for the power supply for hand-held communication equipment. the output voltage of these ics is fixed with high accuracy. since the package for these ics is sot-23-5 (mini-mold) package , high density mounting of the ics on boards is possible. features ? supply curre nt ................................................................ typ. 35 a ? standby mode ................................................................. typ. 0.1 a ? dropout voltage .............................................................. typ. 0.2v (i out = 100ma) ? ripple rejectio n.............................................................. typ. 70db(f = 1khz) ? temperature-drift coefficient of output voltage ............. typ. 100ppm/c ? line regulation ............................................................... typ. 0.05%/v ? output voltage accuracy................................................. 2.0% ? output voltage range..................................................... 1.5v to 5.0v (0.1v steps) ( for other voltages, please refer to mark informations.) ? package ........................................................................ sot-23 -5 (mini-mold) ? built-in chip enable circuit ( 2 types; a: active ?l?, b: active ?h?) ? pin-out............................................................................. similar to the tk112,tk111 applications ? power source for cellular phones such as gsm, cdma and various kinds of pcss. ? power source for domestic appliances such as cameras, vcrs and camcorders. ? power source for battery-powered equipment.
r1121n 2 block diagram r1121nxx1a r1121nxx1b vref current limit v dd 31 2 4 v out gnd ce vref current limit v dd 31 2 4 v out gnd ce selection guide the output voltage, the active type for the ic s can be selected at the user's request. product name package quantity per reel pb free halogen free r1121nxx1 ? -tr-fe sot-23-5 3,000 pcs yes yes xx : the output voltage can be designated in the rang e from 1.5v(15) to 5.0v(50) in 0.1v steps. (for other voltages, please refer to mark informations.) ? : designation of active type. (a) "l" active (b) "h" active
r1121n 3 pin configuration sot-23-5 1 4 5 23 (mark side) pin description pin no symbol description 1 v out output pin 2 gnd ground pin 3 v dd input pin 4 ce or ce chip enable pin 5 nc no connection absolute maximum ratings symbol item rating unit v in input voltage 9.0 v v ce input voltage ( ce or ce pin) -0.3 ~ v in +0.3 v v out output voltage -0.3 ~ v in +0.3 v i out output current 200 ma p d power dissipation (sot-23-5) ? 420 mw topt operating temperature range -40 ~ 85 c tstg storage temperature range -55 ~ 125 c ? ) for power dissipation, please refer to package information. absolute maximum ratings electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and sy stem using the device in the field. the functional operation at or over these absolute maximum ratings is not assured.
r1121n 4 electrical characteristics ? r1121nxx1a topt=25 c symbol item conditions min. typ. max. unit v out output voltage v in = set v out + 1v 1ma < = i out < = 0.98 v out 1.02 v i out output current refer to the electrical characteristics by output voltage v out / i out load regulation v in = set v out + 1v 1ma < = i out < = = set v out + 1v 35 70 a istandby supply current (standby) v in = v ce = set v out + 1v 0.1 1.0 a v out / v in line regulation set v out + 0.5v < = < = = 30ma 0.05 0.20 %/v rr ripple rejection f = 1khz, ripple 0.5vp-p v in = set v out + 1v 70 db v in input voltage 2.0 8.0 v v out / topt output voltage temperature coefficient i out = 30ma ? 40 c < = topt < = c 100 ppm/ c i sc short current limit v out = 0v 50 ma r pu ce pull-up resistance 2.5 5.0 10.0 m v ceh ce input voltage ?h? 1.5 v in v v cel ce input voltage ?l? 0.00 0.25 v en output noise bw = 10hz to 100khz 30 vrms recommended operating conditions (electrical characteristics) all of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. the semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. and the semiconductor de vices may receive serious damage when they continue to operate over the recommended operating conditions.
r1121n 5 ? r1121nxx1b topt=25c symbol item conditions min. typ. max. unit v out output voltage v in = set v out + 1v 1ma < = i out < = 0.98 v out 1.02 v i out output current refer to the electrical characteristics by output voltage v out / i out load regulation v in = set v out + 1v 1ma < = i out < = = set v out + 1v 35 70 a istandby supply current (standby) v in = set v out + 1v v ce =gnd 0.1 1.0 a v out / v in line regulation set v out + 0.5v < = < = = 30ma 0.05 0.20 %/v rr ripple rejection f = 1khz, ripple 0.5vp-p v in = set v out + 1v 70 db v in input voltage 2.0 8.0 v v out / topt output voltage temperature coefficient i out = 30ma ? 40 c < = < = c 100 ppm/ c i sc short current limit v out = 0v 50 ma r pd ce pull-down resistance 2.5 5.0 10.0 m v ceh ce input voltage ?h? 1.5 v in v v cel ce input voltage ?l? 0.00 0.25 v en output noise bw = 10hz to 100khz 30 vrms recommended operating conditions (electrical characteristics) all of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. the semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. and the semiconductor de vices may receive serious damage when they continue to operate over the recommended operating conditions.
r1121n 6 electrical characteristics by output voltage topt = 25c output current i out (ma) output voltage v out (v) condition min. 1.5 < = v out < = 1.7 100 1.8 < = v out < = 5.0 v in - v out = 1.0v 150 topt = 25c dropout voltage v dif (v) output voltage v out (v) condition min. typ. max. 1.5 0.50 1.6 0.40 1.7 0.30 1.8 < = v out < = 1.9 0.60 1.40 2.0 < = v out < = 2.4 0.35 0.70 2.5 < = v out < = 2.7 0.24 0.35 2.8 < = v out < = 3.3 0.20 0.30 3.4 < = v out < = 5.0 i out = 100ma 0.17 0.26 note : when set output voltage is equal or less than 2.0v, v in should be equal or more than 2.0v. operation r1121nxx1a r1121nxx1b v dd 15 2 3 v out gnd r2 r1 ce current limit vref v dd 15 2 3 v out gnd r2 r1 ce current limit vref in these ics, fluctuation of output voltage, v out is detected by feed-back registers r1, r2, and the result is compared with a reference voltage by the error amplifier, so that a constant voltage is output. a current limit circuit for protection in short mode and a chip enable circuit, are included.
r1121n 7 test circuits r1121nxx1b series v dd 1 3 2 4 v out i out in out gnd ce 0.1f 2.2f standard test circuit r1121nxx1b series v dd 1 3 2 4 v out i ss in out gnd ce 0.1f 2.2f supply current test circuit fig.1 standard test circuit fig.2 supply current test circuit r1121nxx1b series v dd 1 3 p. g 2 4 v out i out in out gnd ce ripple rejection, line transient response test circuit r1121nxx1b series v dd 1 3 2 4 v out in out gnd i1 i2 ce 1f load transient response test circuit fig.3 ripple rejection, line transient fig.4 load transient response test circuit response test circuit
r1121n 8 typical characteristics 1) output voltage vs. output current r1121n181b r1121n301b 2.0 1.8 1.6 1.0 0.8 0.6 0.4 0.2 1.4 1.2 0.0 output current i out (ma) 0 200 300 400 500 100 output voltage v out (v) 3.8v 2.8v 2.3v v in = 2.1v topt = 25 c 3.5 2.5 1.5 1.0 0.5 2.0 3.0 0.0 output current i out (ma) 0 200 300 400 500 100 output voltage v out (v) 5.0v 4.0v 3.5v v in = 3.3v topt = 25 c r1121n401b r1121n501b 5.0 4.5 4.0 2.5 2.0 1.5 1.0 0.5 3.5 3.0 0.0 output current i out (ma) 0 200 300 400 500 100 output voltage v out (v) 6.0v 5.0v 4.5v v in = 4.3v topt = 25 c 6.0 5.0 3.0 2.0 1.0 4.0 0.0 output current i out (ma) 0 200 300 400 500 100 output voltage (v) 7.0v 6.0v 5.5v v in = 5.3v topt = 25 c 2) output voltage vs. input voltage r1121n181b r1121n301b 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.2 1.3 input voltage v in (v) 1.0 4.0 5.0 6.0 7.0 8.0 2.0 3.0 output voltage v out (v) i out = 1ma 30ma 50ma topt = 25 c 3.1 3.0 2.9 2.8 2.7 2.5 2.6 input voltage v in (v) 2.0 4.0 5.0 6.0 7.0 8.0 3.0 output voltage v out (v) topt = 25 c 30ma 50ma i out =1ma
r1121n 9 r1121n401b r1121n501b 4.5 4.0 3.5 3.0 2.5 intput voltage v in (v) 2.0 4.0 5.0 6.0 8.0 7.0 3.0 output voltage v out (v) i out = 1ma 30ma 50ma topt = 25 c 5.5 5.0 4.0 3.5 3.0 4.5 2.5 intput voltage v in (v) 2.0 4.0 5.0 6.0 8.0 7.0 3.0 output voltage v out (v) i out = 1ma 30ma 50ma topt = 25 c 3) dropout voltage vs. output current r1121n181b r1121n301b 1.20 1.00 0.80 0.60 0.40 0.20 0.00 output current i out (ma) 0 50 100 150 dropout voltage v dif (v) topt = 85 c 25c -40c 0.40 0.35 0.30 0.20 0.15 0.10 0.05 0.25 0.00 output current i out (ma) 0 50 100 150 dropout voltage v dif (v) topt = 85 c 25c -40c r1121n401b r1121n501b 0.40 0.35 0.30 0.25 0.20 0.15 0.00 0.05 0.10 output current i out (ma) 0 50 100 150 dropout voltage v dif (v) topt = 85 c 25c -40c 0.40 0.35 0.30 0.25 0.20 0.15 0.00 0.05 0.10 output current i out (ma) 0 50 100 150 dropout voltage v dif (v) topt = 85 c 25c -40c
r1121n 10 4) output voltage vs. temperature r1121n181b r1121n301b 1.90 1.88 1.86 1.80 1.78 1.76 1.74 1.72 1.84 1.82 1.70 temperature topt ( c) -50 0 25 50 100 75 -25 output voltage v out (v) v in = 2.8v i out = 30ma 3.10 3.08 3.06 3.00 2.98 2.96 2.94 2.92 3.04 3.02 2.90 temperature topt ( c) -50 0 25 50 10 0 75 -25 output voltage v out (v) i out = 30ma v in = 4.0v r1121n401b r1121n501b 4.10 4.08 4.06 4.00 3.98 3.96 3.94 3.92 4.04 4.02 3.90 temperature topt ( c) -50 0 25 50 10 0 75 -25 output voltage v out (v) i out = 30ma v in = 5.0v 5.10 5.08 5.06 5.00 4.98 4.96 4.94 4.92 5.04 5.02 4.90 temperature topt ( c) -50 0 25 50 10 0 75 -25 output voltage v out (v) i out = 30ma v in = 6.0v 5) supply current vs. input voltage r1121n181b r1121n301b 60 50 40 30 20 0 10 input voltage v in (v) 1.0 2.0 4.0 5.0 6.0 7.0 8. 0 3.0 supply current i i ss (a) topt = 25 c 60 50 40 30 20 0 10 input voltage v in (v) 1.0 2.0 4.0 5.0 6.0 7.0 8.0 3.0 supply current i i ss (a) topt = 25 c
r1121n 11 r1121n401b r1121n501b 60 50 40 30 20 10 0 intput voltage v in (v) 1.0 4.0 5.0 6.0 7.0 8. 0 2.0 3.0 supply current i ss (a) topt = 25 c 60 50 40 30 20 10 0 intput voltage v in (v) 1.0 4.0 5.0 6.0 7.0 8.0 2.0 3.0 supply current i ss (a) topt = 25 c 6) supply current vs. temperature r1121n181b r1121n301b 50 45 40 35 30 20 25 temperature topt ( c) -50 50 100 0 supply current i ss (a) v in = 2.8v 50 45 40 35 30 20 25 temperature topt ( c) -50 50 100 0 supply current i ss (a) v in = 2.8v r1121n401b r1121n501b 50 45 40 35 30 20 25 temperature topt ( c) -50 50 100 0 supply current i ss (a) v in = 5.0v 50 45 40 35 30 20 25 temperature topt ( c) -50 50 100 0 supply current i ss (a) v in = 6.0v
r1121n 12 7) dropout voltage vs. set output voltage r1121nxx1b 0.8 0.9 1.0 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 1.0 2.0 3.0 4.0 5.0 i out = 150ma i out = 100ma i out = 50ma i out = 30ma i out = 10ma set output voltage vreg (v) dropout voltage v dif (v) topt = 25 8) ripple rejection vs. frequency r1121n181b r1121n181b 80 70 60 50 40 30 20 10 0 0.1 1 10 100 i out = 1ma i out = 30ma i out = 50ma frequency f (khz) ripple rejection rr (db) v in = 2.8v dc + 0.5vp-p c out = tantal 1.0f 80 70 60 50 40 30 20 10 0 0.1 1 10 100 i out = 1ma i out = 30ma i out = 50ma frequency f (khz) ripple rejection rr (db) v in = 2.8v dc + 0.5vp-p c out = tantal 2.2f r1121n301b r1121n301b 80 70 60 50 40 30 20 10 0 0.1 1 10 100 i out = 1ma i out = 30ma i out = 50ma frequency f (khz) ripple rejection rr (db) v in = 4.0v dc + 0.5vp-p c out = tantal 1.0f 80 70 60 50 40 30 20 10 0 0.1 1 10 100 i out = 1ma i out = 30ma i out = 50ma frequency f (khz) ripple rejection rr (db) v in = 4.0v dc + 0.5vp-p c out = tantal 2.2f
r1121n 13 r1121n401b r1121n401b 80 70 60 50 40 30 20 10 0 0.1 1 10 100 i out = 1ma i out = 30ma i out = 50ma frequency f (khz) ripple rejection rr (db) v in = 5.0v dc + 0.5vp-p c out = tantal 1.0f 80 70 60 50 40 30 20 10 0 0.1 1 10 100 i out = 1ma i out = 30ma i out = 50ma frequency f (khz) ripple rejection rr (db) v in = 5.0v dc + 0.5vp-p c out = tantal 2.2f 9) ripple rejection vs. input voltage (dc bias) r1121n301b r1121n301b 80 70 60 50 40 30 20 10 0 3.1 3.2 3.3 3.4 3.5 f = 400hz f = 1khz f = 10khz input voltage v in (v) ripple rejection rr (db) i out = 1ma c out = 2.2f 80 70 60 50 40 30 20 10 0 3.1 3.2 3.3 3.4 3.5 f = 400hz f = 1khz f = 10khz input voltage v in (v) ripple rejection rr (db) i out = 10ma c out = 2.2f r1121n301b 80 70 60 50 40 30 20 10 0 3.1 3.2 3.3 3.4 3.5 f = 400hz f = 1khz f = 10khz input voltage v in (v) ripple rejection rr (db) i out = 50ma c out = 2.2f
r1121n 14 10) linetransient response r1121n301b i out =30ma tr=tf=5 s c out =tantalum 1.0 f 2.8 2.9 3.0 3.1 3.2 3.3 3.4 time t (s) output voltage v out (v) input voltage v in (v) 0 20 40 60 80 100 120 0 1 6 5 4 3 2 input voltage output voltage r1121n301b i out =30ma tr=tf=5 s c out =tantalum 2.2 f 2.8 2.9 3.0 3.1 3.2 3.3 3.4 time t (s) output voltage v out (v) input voltage v in (v) 0 20 40 60 80 100 120 0 1 6 5 4 3 2 input voltage output voltage r1121n301b i out =30ma tr=tf=5 s c out =tantalum 6.8 f 2.8 2.9 3.0 3.1 3.2 3.3 3.4 time t (s) output voltage v out (v) input voltage v in (v) 0 20 40 60 80 100 120 0 1 6 5 4 3 2 input voltage output voltage
r1121n 15 11) load transient response r1121n301b v in =4v c in =tantalum 1 f c out =tantalum 1.0 f 2.8 2.9 3.0 3.1 3.2 3.3 3.4 time t (s) output voltage v out (v) output current i out (ma) 02468 10 12 14 16 18 20 -150 -100 150 100 50 0 -50 output current output voltage r1121n301b v in =4v c in =tantalum 1 f c out =tantalum 2.2 f 2.8 2.9 3.0 3.1 3.2 3.3 3.4 time t (s) output voltage v out (v) output current i out (ma) 02468 10 12 14 16 18 20 -150 -100 150 100 50 0 -50 output current output voltage r1121n301b v in =4v c in =tantalum 1 f c out =tantalum 6.8 f 2.8 2.9 3.0 3.1 3.2 3.3 3.4 time t (s) output voltage v out (v) output current i out (ma) 02468 10 12 14 16 18 20 -150 -100 150 100 50 0 -50 output current output voltage
r1121n 16 technical notes when using these ics, be sure to consider the following points: in these ics, phase compensation is made for securing st able operation even if the load current is varied. for this purpose, be sure to use a capacitor c out with good frequency characteristics and esr (equivalent series resistance) in the range described as follows: vout iout vin vin ce gnd esr ceramic capacitor ceramic capacitor 1f r1121n301b spectrum analyzer s.a. 4 3 2 1 measuring circuit for white noise; r1121n301b the relationship between i out (output current) and esr of output capaci tor is shown in the graphs below. the conditions when the white noise level is under 40mv (avg .) are indicated by the hatched area in the graph. (note: when the additional ceramic capacitors are connec ted to the output pin with output capacitor for phase compensation, the operation might be unstable. because of this, test these ics with as the same external components as the ones to be used on the pcb.) (1) v in = 4v (2) frequency band: 10hz to 1mhz (3) temperature: 25 c r1121n301b r1121n301b 100.0 10.0 1.0 0.1 output current i out (ma) 0 100 50 150 esr () ceramic 1.0 f 100.0 10.0 1.0 0.1 output current i out (ma) 0 100 50 150 esr () ceramic 2.2 f
r1121n 17 make v dd and gnd lines sufficient. if their impedance is high, noise pick up or incorrect operation may result. connect the capacitor with a capacitance of 1 p f or more between v dd and gnd as close as possible. set external components, especially the output capacitor, as close as possible to the ics and make wiring as short as possible. typical application r1121nxx1a v out out in v dd gnd ce cap. cap. r1121nxx1b v out out in v dd gnd ce cap. cap.
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