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'2001.10.24 sc82 120ma ldo regulator r1141q series rev. 1.11 - 1 - outline the r1141q series are voltage regulator ics with high output voltage accuracy, low supply current, low on-resistance, and high ripple rejection by cmos process. each of these voltage regulator ics consists of a voltage reference unit, an error amplifier, resistors for setting output voltage, a current limit circuit, and a chip enable circuit. output current limit circuit is embedded in the r1141q series to prevent the break down of the ic caused by excess current. chip enable circuit realizes standby mode and makes consumption current extremely small. these ics perform with low dropout voltage and a chip enable function. the line transient response and load transient response of the r1141q series are excellent, thus these ics are very suitable for the power supply for hand-held communication equipment. the output voltage of these ics is internally fixed with high accuracy. since the package for these ics is sc-82ab (super mini-mold) package, high density mounting of the ics on boards is possible. features z ultra-low supply current......................................... typ. 90 a z standby mode ........................................................... typ. 0.1 a z low dropout voltage ................................................ typ. 0.15v(i out =100ma output voltage=3.0v type) z high ripple rejection ............................................... typ. 75db(v out 2.4v),70db(v out 2.5v) (f=1khz) z low temperature-drift coefficient of output voltage typ. 100ppm/ c z excellent line regulation ......................................... typ. 0.02%/v z high output voltage accuracy.................................. 1.5% or 30mv(v out 2.0v) z excellent dynamic response z small package ..........................................................sc-82ab(super mini-mold) z output voltage...........................................................stepwise setting with a step of 0.1v in the range of 1 .5v to 4.0v is possible z built-in chip enable circuit (b/d: active high) z built-in fold-back protection circuit ..........................typ. 40ma (current at short mode) z ceramic capacitor can be used for output pin..........recommended value is 2.2 f or more. applications z power source for cellular phones such as gsm, cdma and various kinds of pcs. z power source for electrical appliances such as cameras, vcrs, camcorders, and hand-held communication equipment. z power source for battery-powered equipment. z very stable voltage reference
rev. 1.11 - 2 - block diagram r1141qxx1b r1141qxx1d v dd v ou t gnd 4 32 1 vref current limit + - ce v out ce v dd gnd 4 3 2 1 vref current limit + - selection guide the output voltage, mask option, and the taping type for the ics can be selected at the user's request. the selection can be ma de with designating the part number as shown below; r1141qxx1x-xx part number abcd code contents a designation of package type : q:sc82-ab (super mini-mold) b setting output voltage (v out ) : stepwise setting with a step of 0.1v in the range of 1.5v to 4.0v is possible. c designation of mask option : b: without auto discharge function at off state. d: with auto discharge function at off state. d designation of taping type : ex. tr, tl (refer to taping specifications; tr type is the standard direction.)
rev. 1.11 - 3 - pin configuration sc-82ab mark side 12 3 4 pin description pin no. symbol description 1v out output pin 2 gnd ground pin 3 ce chip enable pin 4v dd input pin absolute maximum ratings item symbol rating unit input voltage v in 6.5 v input voltage(ce pin) v ce -0.3 ~ v in +0.3 v output voltage v out -0.3 ~ v in +0.3 v output current i out 140 ma power dissipation p d 150 mw operating temperature range topt -40 ~ 85 c storage temperature range tstg -55 ~ 125 c
rev. 1.11 - 4 - electrical characteristics r1141qxx1b/r1141qxx1d topt=25 c symbol item conditions min. typ. max. unit v out output voltage v in = set v out +1v 1ma i out 30ma(note 1) v out 0.985 (-30mv) v out 1.015 (+30mv) v i out output current v in - v out = 1.0v 120 ma ? v out / ? i out load regulation v in = set v out +1v 1ma i out 120ma 12 40 mv v dif dropout voltage refer to the electrical characteristics by output voltage i ss supply current v in = set v out +1v 90 160 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 v in 6v i out = 30ma (in case that v out 1.6v, 2.2v v in 6v) 0.02 0.10 %/v rr ripple rejection f = 1khz, ripple 0.5vp-p v in = set v out +1v, i out = 30ma (in case that v out 1.7v, v in -v out =1.2v) 75 (70) (note 2) db v in input voltage 2.2 6.0 v ? v out / ? t output voltage temperature coefficient i out = 30ma -40 c topt 85 c 100 ppm / c ilim short current limit v out = 0v 40 ma r pu ce pull-up resistance 0.7 2.0 8.0 m ? v ceh ce input voltage ?h? 1.5 v in v v cel ce input voltage ?l? 0.0 0.3 v e n output noise bw=10hz to 100khz 30 vrms r low low output nch tr. on resistance (of d version) v ce =0v 60 ? note 1: 30mv tolerance at v out 2.0v note 2:70db at v out 2.5v electrical characteristics by output voltage topt = 25 c dropout voltage v dif (v) output voltage v out (v) condition typ. max. v out = 1.5 0.36 0.70 v out = 1.6 0.32 0.60 v out = 1.7 0.30 0.50 1.8 v out 2.0 0.28 0.40 2.1 v out 2.7 0.24 0.35 2.8 v out 4.0 i out = 120ma 0.18 0.28
rev. 1.11 - 5 - technical notes when using these ics, consider the following points: phase compensation in these ics, phase compensation is made for securing stable operation even if the load current is varied. for this purpose, be sure to use a 2.2 f or more capacitor c out with good frequency characteristics and esr (equivalent series resistance). (note: when the additional ceramic capacitors are connected to the output pin with output capacitor for phase compensation, the operation might be unstable. because of this, test these ics with as same external components as ones to be used on the pcb.) pcb layout make vdd and gnd line sufficient. when the impedance of these is high, it would be a cause of picking up the noise or unstable operation. connect a capacitor with as much as 1.0 f capacitor between v dd and gnd pin as close as possible. set external components, especially output capacitor as close as possible to the ics and make wiring shortest. test circuits c2 = ceramic 2.2 f * c1 = ceramic 1.0 f c1 v out c2 gnd ce v out v dd 3 4 r1141q series i out 1 2 v fig.1 standard test circuit c2 = ceramic 2.2 f * c1 = ceramic1.0 f a i ss c1 c2 gnd ce v out v dd 3 4 r1141q series 1 2 fig.2 supply current test circuit
rev. 1.11 - 6 - c2 gnd ce v out v dd 3 4 r1141q series i out 1 2 pulse generator pg fig.3 ripple rejection, line transient response test circuit c2 = ceramic 2.2 f * c1 = ceramic 1.0 f c1 i outb c2 gnd ce v out v dd 3 4 r1141q series i outa 1 2 fig.4 load transient response test circuit typical application c1 c2 gnd ce v out v dd 3 4 r1141q series 1 2 out in (external components) output capacitor; ceramic type c1=1 f c2=2.2 f
rev. 1.11 - 7 - typical characteristics 1) output voltage vs. output current r1141q151x r1141q201x 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 50 100 150 200 250 300 output current iout[ma] output voltagevout[v] 0.0 0.5 1.0 1.5 2.0 2.5 0 50 100 150 200 250 300 output current iout[ma] output voltage vout[v] r1141q281x r1141q401x 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 50 100 150 200 250 300 output current iout[ma] output voltagevout[v] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 0 50 100 150 200 250 300 output current iout[ma] output voltage vout[v] 2) output voltage vs. input voltage r1141q151x r1141q201x 1.0 1.1 1.2 1.3 1.4 1.5 1.6 123456 input voltage vin[v] output voltage vout[v] iout=-1ma iout=-30ma iout=-50ma 1.0 1.2 1.4 1.6 1.8 2.0 2.2 123456 input voltage vin[v] output voltage vout[v] iout=-1ma iout=-30ma iout=-50ma v in =1.8v 2.0v 2.5v 3.5v v in =2.3v 2.5v 3.0v 4.0v v in =3.1v 3.3v 3.8v 4.8v v in =4.3v 4.5v 5.0v 6.0v
rev. 1.11 - 8 - r1141q281x r1141q401x 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 123456 input voltage vin[v] output voltage vout[v] iout=-1ma iout=-30ma iout=-50ma 3.0 3.2 3.4 3.6 3.8 4.0 4.2 123456 input voltage vin[v] output voltage vout[v] iout=-1ma iout=-30ma iout=-50ma 3) dropout voltage vs. output current r1141q151x r1141q201x 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0 20 40 60 80 100 120 output current iout[ma] dropout voltage vdif.[v] 85 25 -40 0.0 0.1 0.2 0.3 0.4 0 20 40 60 80 100 120 output current iout[ma] dropout voltage vdif.[v] 85 25 -40 r1141q281x r1141q401x 0.00 0.05 0.10 0.15 0.20 0.25 0 20 40 60 80 100 120 output current iout[ma] dropout voltage vdif.[v] 85 25 -40 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0 20 40 60 80 100 120 output current iout[ma] dropout voltage vdif.[v] 85 25 -40
rev. 1.11 - 9 - 4) output voltage vs. temperature r1141q151x r1141q201x v in =2.5v, i out =30ma v in =3.0v, i out =30ma 1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 1.54 -50 -25 0 25 50 75 100 temperature topt output voltage v out [v] 1.94 1.96 1.98 2.00 2.02 2.04 -50 -25 0 25 50 75 100 temperature topt output voltage v out [v] r1141q281x r1141q401x v in =3.8v, i out =30ma v in =5.0v, i out =30ma 2.74 2.76 2.78 2.80 2.82 2.84 2.86 -50 -25 0 25 50 75 100 temperature topt output voltage v out [v] 3.92 3.94 3.96 3.98 4.00 4.02 4.04 4.06 4.08 -50 -25 0 25 50 75 100 temperature topt output voltage v out [v] 5) supply current vs. input voltage (topt=25 c) r1141q151x r1141q201x 0 10 20 30 40 50 60 70 80 90 100 0123456 input voltage vin[v] supply current i ss [ua] 0 10 20 30 40 50 60 70 80 90 100 0123456 input voltage vin[v] supply current i ss [ua] ( c) ( c) ( c) ( c)
rev. 1.11 - 10 - r1141q281x r1141q401x 0 10 20 30 40 50 60 70 80 90 100 0123456 input voltage vin[v] supply current i ss [ua] 0 10 20 30 40 50 60 70 80 90 100 0123456 input voltage vin[v] supply current i ss [ua] 6) supply current vs. temperature r1141q151x r1141q201x v in =2.5v v in =3.0v 60 70 80 90 100 110 120 -50 0 50 100 temperature topt supply current i ss [ua] 60 70 80 90 100 110 120 -50 0 50 100 temperature topt supply current i ss [ua] r1141q281x r1141q401x v in =3.8v v in =5.0v 60 70 80 90 100 110 120 -50 0 50 100 temperature topt supply current i ss [ua] 60 70 80 90 100 110 120 -50 0 50 100 temperature topt supply current i ss [ua] ( c) ( c) ( c) ( c)
rev. 1.11 - 11 - 7) dropout voltage vs. set output voltage 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.0 2.0 3.0 4.0 set output voltage vreg[v] dropout voltage vdif[v] 10ma 30ma 50ma 120ma 8) ripple rejection vs. frequency r1141q151x r1141q281x v in =2.5v+0.5vp-p, c in = none, c out = ceramic 2.2 fv in =3.8v+0.5vp-p, c in = none, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 0.1 1 10 100 frequency f (khz) ripple rejection rr [db] 0 10 20 30 40 50 60 70 80 90 0.1 1 10 100 frequency f (khz) ripple rejection rr [db] r1141q401x v in =5.0v+0.5vp-p, c in = none, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 0.1 1 10 100 frequency f (khz) ripple rejection rr [db]
rev. 1.11 - 12 - 9) ripple rejection vs. input bias r1141q281x r1141q281x i out =1ma, c in = none, c out = ceramic 2.2 fi out =30ma, c in = none, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 100 2.8 2.9 3 3.1 3.2 3.3 input voltage v in (v) ripple rejection rr [db] 1khz 10khz 100khz 0 10 20 30 40 50 60 70 80 90 100 2.8 2.9 3 3.1 3.2 3.3 input voltage v in (v) ripple rejection rr [db] 1khz 10khz 100khz r1141q281x i out =50ma, c in = none, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 100 2.8 2.9 3 3.1 3.2 3.3 input voltage v in (v) ripple rejection rr [db] 1khz 10khz 100khz 10) input transient response r1141q281x v in =3.8v to 4.8v, i out =30ma, c out = ceramic 1.0 f, tr=tf =5.0 s 2.77 2.78 2.79 2.80 2.81 2.82 2.83 -20-100 1020304050607080 time t[us] output voltage vout[v] 0 1 2 3 4 5 6 input voltage vin[v] input voltage output voltage
rev. 1.11 - 13 - r1141q281x v in =3.8v to 4.8v, i out =30ma, c out = ceramic 2.2 f, tr=tf =5.0 s 2.77 2.78 2.79 2.80 2.81 2.82 2.83 -20-10 0 1020304050607080 time t[us] output voltage vout[v] 0 1 2 3 4 5 6 input voltage vin[v] r1141q281x v in =3.8v to 4.8v, i out =30ma, c out = ceramic 4.7 f, tr=tf =5.0 s 2.77 2.78 2.79 2.80 2.81 2.82 2.83 -20-100 1020304050607080 time t[us] output voltage vout[v] 0 1 2 3 4 5 6 input voltage vin[v] 11) load transient response r1141q281x v in =3.8v, i out =50ma 100ma, c in = ceramic 1.0 f c out = ceramic 1.0 f, tr =t f =5 . 0 s 2.70 2.75 2.80 2.85 2.90 2.95 3.00 14 16 18 20 22 24 26 28 30 32 34 time t[us] output voltage vout[v] -150 -100 -50 0 50 100 150 output current iout[ma] input voltage output voltage input voltage output voltage output voltage output current
rev. 1.11 - 14 - r1141q281x v in =3.8v, i out =50ma 100ma, c in = ceramic 1.0 f c out = ceramic 2.2 f, tr =t f =5 . 0 s 2.70 2.75 2.80 2.85 2.90 2.95 3.00 14 16 18 20 22 24 26 28 30 32 34 time t[us] output voltage vout[v] -150 -100 -50 0 50 100 150 output current iout[ma] r1141q281x v in =3.8v, i out =50ma 100ma, c in = ceramic 1.0 f c out = ceramic 4.7 f, tr =t f =5 . 0 s 2.70 2.75 2.80 2.85 2.90 2.95 3.00 14 16 18 20 22 24 26 28 30 32 34 time t[us] output voltage vout[v] -150 -100 -50 0 50 100 150 output current iout[ma] output voltage output current output voltage output current
rev. 1.11 - 15 - technical notes when using these ics, consider the following points: in these ics, phase compensation is made for securing stable 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) of which is in the range described as follows: the relations between i out (output current) and esr of output capacitor are shown below. the conditions when the white noise level is under 40 v(avg.) are marked as the hatched area in the graph. (1) v in =v set+ 1v (2) frequency band: 10hz to 30mhz (3) temperature: 25 c r1141q151x r1141q281x f=10hz to 2mhz, c in = ceramic 1.0 f, c out = ceramic 2.2 f f=10hz to 2mhz,c in = ceramic1.0 f, c out = ceramic2.2 f 0.01 0.1 1 10 100 0306090120 output current iout(ma) esr (ohm ) 0.01 0.1 1 10 100 0 306090120 output current iout(ma) esr (ohm)

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