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sc-82 120ma ldo regulator r1141q series no. ea-082-0411 1 outline the r1141q series consist of cmos-based voltage regul ator ics with high output voltage accuracy, low supply current, low on-resistance, and high ripple rejecti on. each of these voltage regulator ics consists of a voltage reference unit, an error amplifier, resistors for se tting 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, making these ics very suitabl e for the power supply for hand-held communication equipment. their output voltage is internally fixed with high accu racy. since the package for these ics is sc-82ab (super mini-mold) package, high density mount ing of the ics on boards is possible. features ? ultra-low supply cu rrent............................................. typ. 90 a ? standby mode .............................................................. typ. 0.1 a ? low dropout voltage .................................................... typ. 0.15v (i out = 100ma, output voltage=3.0v type) ? high ripple rejectio n .................................................. typ. 75db (v out < = > = 2.5v) (f=1khz) ? low temperature-drift coefficient of output voltage... typ. 100ppm/ c ? excellent line regula tion ............................................ typ. 0.02%/v ? high output vo ltage accu racy ..................................... 1.5% or 30mv (v out < = ? excellent dynamic response ? small package ............................................................. sc-82ab (super mini-mold) ? output voltage ............................................................. stepwise setting with a step of 0.1v in the range of 1.5v to 4.0v is possible ? built-in chip enable circuit (b/d : active high) ? built-in fold-back protection circ uit............................ typ. 40ma (short current) ? ceramic capacitor can be used for output pin ........... recommended value is 2.2f or more. applications ? power source for cellular phones such as gsm, cdma and various kinds of pcs. ? power source for electrical appliances such as cameras, vcrs and camcorders, and hand-held communication equipment. ? power source for battery-powered equipment. ? very stable voltage reference
r1141q 2 block diagrams r1141qxx1b r1141qxx1d 4 3 2 v out gnd v dd ce + - vref 1 current limit 4 3 2 v out gnd v dd ce + - vref 1 current limit selection guide the output voltage, mask option, and the taping type fo r the ics can be selected at the user's request. the selection can be made with designating the part number as shown below; r1141qxx 1x-xx part number a b c d code contents a designation of package type q: sc-82ab (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 (refer to taping specifications.)
r1141q 3 pin configuration sc-82ab pin description pin no symbol pin description 1 v out output pin 2 gnd ground pin 3 ce chip enable pin 4 v dd input pin absolute maximum ratings symbol item rating unit v in input voltage 6.5 v v ce input voltage (ce pin) 6.5 v v out output voltage ? 0.3 v in + 0.3 v i out output current 140 ma p d power dissipation 150 mw topt operating temperature range ? 40 85 c tstg storage temperature range ? 55 125 c 1 2 43 (mark side)
r1141q 4 electrical characteristics ? r1141qxx1b/r1141qxx1d topt = 25 c symbol item conditions min. typ. max. unit v out output voltage v in = set v out +1.0v 1ma < = < = ?~ 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 +1.0v 1ma < = < = a istandby supply current (standby) v in = v ce = set v out +1.0v 0.1 1.0 a ? v out / ? v in line regulation set v out +0.5v < = < = < = < = < = < = ? v out / ? t output voltage temperature coefficient i out = 30ma ? 40 c < = < = c 100 ppm/ c i lim 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 en 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
r1141q 5 ? electrical characteristics by output voltage 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 < = < = v out < = < = v out < = out = 120ma 0.18 0.28 technical notes when using these ics, consider the following points: phase compensation 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 2.2f or more capacitor c out with good frequency characteristics and esr (equivalent series resistance). (note: when the additional ceramic capacitors are conn ected to the output pin with output capacitor for phase compensation, the operation might be unstable. becaus e of this, test these ics with as same external components as ones to be used on the pcb.) pcb layout make v dd and gnd lines sufficient. when their impedance is high, picking up the noise or unstable operation may result. connect a capacitor with as much as 1.0f 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 as short as possible.
r1141q 6 test circuits 1 4 3 2 gnd v dd r1141q series v out ce c1 c2 v out v i out c1=ceramic 1.0 f c2=ceramic 2.2 f 1 4 3 2 gnd v dd r1141q series v out ce c1 c2 i ss a c1=ceramic 1.0 f c2=ceramic 2.2 f fig.1 standard test circuit fig.2 supply current test circuit 1 4 3 2 gnd v dd r1141q series v out ce c2 i out c2=ceramic pulse generator p .g. 1 4 3 2 gnd v dd r1141q series v out ce c1 c2 i outa i outb c1=ceramic 1.0 f c2=ceramic fig.3 ripple rejection, line transient fig.4 load transient response test circuit response test circuit typical application 1 4 3 2 gnd v dd in out r1141q series v out ce c1 c2 (external components) output capacitor; ceramic type c1=1.0f c2=2.2f
r1141q 7 typical characteristics 1) output voltage vs. output current r1141q151x r1141q201x 1.6 1.4 1.2 0.8 0.6 1.0 0.4 0.2 0.0 output current i out (ma) output voltage v out (v) 0 50 100 200 250 300 150 v in =1.8v 2.0v 3.5v 2.5v 2.5 2.0 1.5 0.5 1.0 0.0 0 50 100 200 250 300 150 output current i out (ma) output voltage v out (v) v in =2.3v 2.5v 3.0v 4.0v r1141q281x r1141q401x 3.0 2.0 2.5 1.5 0.5 1.0 0.0 0 50 100 200 250 300 150 output current i out (ma) output voltage v out (v) v in =3.1v 3.3v 3.8v 4.8v 4.5 3.0 2.5 2.0 4.0 3.5 1.5 0.5 1.0 0.0 0 50 100 200 250 300 150 output current i out (ma) output voltage v out (v) v in =4.3v 4.5v 6.0v 5.0v 2) output voltage vs. input voltage r1141q151x r1141q201x 1.6 1.4 1.5 1.3 1.1 1.2 1.0 input voltage v in (v) 123 56 4 output voltage v out (v) i out =-1ma i out =-30ma i out =-50ma 2.2 1.8 2.0 1.6 1.2 1.4 1.0 123 56 4 input voltage v in (v) output voltage v out (v) i out =-1ma i out =-30ma i out =-50ma
r1141q 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 v in (v) output voltage v out (v) i out =-1ma i out =-30ma i out =-50ma 3.0 3.2 3.4 3.6 3.8 4.0 4.2 16 5 4 3 2 input voltage v in (v) output voltage v out (v) i out =-1ma i out =-30ma i out =-50ma 3) dropout voltage vs. output current r1141q151x r1141q201x 1.2 1.0 0.8 0.6 0.4 0.2 0.0 output current i out (ma) dropout voltage v dif (v) 0 20 40 80 100 120 60 85 c 25 c -40 c 0.4 0.3 0.2 0.1 0.0 0 20 40 80 100 120 60 output current i out (ma) dropout voltage v dif (v) 85 c 25 c -40 c r1141q281x r1141q401x 0.25 0.20 0.15 0.10 0.05 0.00 0 20 40 80 100 120 60 output current i out (ma) dropout voltage v dif (v) 85 c 25 c -40 c 0.20 0.16 0.12 0.18 0.14 0.06 0.02 0.00 0.08 0.10 0.04 0 20 40 80 100 120 60 output current i out (ma) dropout voltage v dif (v) 85 c 25 c -40 c
r1141q 9 4) output voltage vs. temperature r1141q151x r1141q201x 1.54 1.53 1.52 1.51 1.50 1.49 1.48 1.47 1.46 temperature topt( c ) -50 -25 0 50 75 100 25 output voltage v out (v) v in =2.5v, i out =30ma 2.04 2.02 2.00 1.98 1.96 1.94 -50 -25 0 50 75 100 25 v in =3.0v, i out =30ma temperature topt( c ) output voltage v out (v) r1141q281x r1141q401x 2.86 2.84 2.82 2.80 2.78 2.76 2.74 -50 -25 0 50 75 100 25 v in =3.8v, i out =30ma temperature topt( c ) output voltage v out (v) 4.08 4.04 4.06 4.02 3.98 4.00 3.96 3.94 3.92 -50 -25 0 50 75 100 25 v in =5.0v, i out =30ma temperature topt( c ) output voltage v out (v) 5) supply current vs. input voltage (topt=25c) r1141q151x r1141q201x 100 70 90 80 50 60 30 40 20 10 0 input voltage v in (v) 012 456 3 supply current i ss ( a) 100 70 90 80 50 60 30 40 20 10 0 012 456 3 input voltage v in (v) supply current i ss ( a)
r1141q 10 r1141q281x r1141q401x 0 10 20 30 40 50 60 70 80 90 100 012 456 3 input voltage v in (v) supply current i ss ( a) 0 10 20 30 40 50 60 70 80 90 100 012 456 3 input voltage v in (v) supply current i ss ( a) 6) supply current vs. temperature r1141q151x r1141q201x 60 70 80 90 100 110 120 temperature topt( c ) -50 0 50 100 supply current i ss ( a) v in =2.5v 60 70 80 90 100 110 120 -50 0 50 100 temperature topt( c ) supply current i ss ( a) v in =3.0v r1141q281x r1141q401x 60 70 80 90 100 110 120 -50 0 50 100 temperature topt( c ) supply current i ss ( a) v in =3.8v 60 70 80 90 100 110 120 -50 0 50 100 temperature topt( c ) supply current i ss ( a) v in =5.0v
r1141q 11 7) dropout voltage vs. set output voltage 1.0 0.7 0.9 0.8 0.5 0.6 0.3 0.4 0.2 0.1 0.0 set output voltage v reg (v) 1.0 2.0 3.0 4.0 dropout voltage v dif (v) 10ma 30ma 50ma 120ma 8) ripple rejection vs. frequency r1141q151x r1141q281x 90 80 50 40 60 70 30 10 20 0 frequency f(khz) ripple rejection rr(db) 0.1 1 10 100 v in =2.5v+0.5vp-p, c in =none c out =ceramic 2.2 f 90 80 50 40 60 70 30 10 20 0 0.1 1 10 100 v in =3.8v+0.5vp-p, c in =none c out =ceramic 2.2 f frequency f(khz) ripple rejection rr(db) r1141q401x 90 80 50 40 60 70 30 10 20 0 0.1 1 10 100 v in =5.0v+0.5vp-p, c in =none c out =ceramic 2.2 f frequency f(khz) ripple rejection rr(db)
r1141q 12 9) ripple rejection vs. input bias r1141q281x r1141q281x 100 90 80 70 60 50 40 30 20 10 0 2.8 2.9 3 3.2 3.3 3.1 c out =ceramic 2.2f i out =1ma, c in =none, 1khz 10khz 100khz input voltage v in (v) ripple rejection rr(db) 100 90 80 70 60 50 40 30 20 10 0 2.8 2.9 3 3.2 3.3 3.1 c out =ceramic 2.2f i out =30ma, c in =none, 1khz 10khz 100khz input voltage v in (v) ripple rejection rr(db) r1141q281x 100 90 80 70 60 50 40 30 20 10 0 2.8 2.9 3 3.2 3.3 3.1 c out =ceramic 2.2f i out =50ma, c in =none, 1khz 10khz 100khz input voltage v in (v) ripple rejection rr(db)
r1141q 13 10) input transient response r1141q281x v in =3.8v to 4.8v, i out =30ma, c out =ceramic 1.0 f, t r =tf=5.0 s 2.83 2.82 2.81 2.80 2.79 2.78 2.77 6 5 4 3 2 1 0 time t( s) output voltage v out (v) input voltage v in (v) -10 -20 0 20304050607080 10 output voltage input voltage r1141q281x v in =3.8v to 4.8v, i out =30ma, c out =ceramic 2.2 f, t r =tf=5.0 s 2.83 2.82 2.81 2.80 2.79 2.78 2.77 6 5 4 3 2 1 0 -10 -20 0 20304050607080 10 time t( s) output voltage v out (v) input voltage v in (v) output voltage input voltage r1141q281x v in =3.8v to 4.8v, i out =30ma, c out =ceramic 4.7 f, tr=tf=5.0 s 2.83 2.82 2.81 2.80 2.79 2.78 2.77 6 5 4 3 2 1 0 -10 -20 0 20304050607080 10 time t( s) output voltage v out (v) input voltage v in (v) output voltage input voltage
r1141q 14 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=tf=5.0 s 3.00 2.95 2.90 2.85 2.80 2.75 2.70 150 100 50 0 16 14 18 22 24 26 28 30 32 34 20 time t( s) output voltage v out (v) output current i out (ma) output voltage output current r1141q281x v in =3.8v, i out =50ma 100ma, c in =ceramic 1.0 f c out =ceramic 2.2 f, tr=tf=5.0 s 3.00 2.95 2.90 2.85 2.80 2.75 2.70 150 100 50 0 16 14 18 22 24 26 28 30 32 34 20 time t( s) output voltage v out (v) output current i out (ma) output voltage output current r1141q281x v in =3.8v, i out =50ma 100ma, c in =ceramic 1.0 f c out =ceramic 4.7 f, tr=tf=5.0 s 3.00 2.95 2.90 2.85 2.80 2.75 2.70 150 100 50 0 16 14 18 22 24 26 28 30 32 34 20 time t( s) output voltage v out (v) output current i out (ma) output voltage output current
r1141q 15 technical notes when using these ics, 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) of which is in the range described as follows: the relations between i out (output current) and esr of output ca pacitor are shown below. the conditions when the white noise level is under 40v (avg.) are marked as the hatched area in the graph. (1) v in =v set +1v (2) frequency band: 10hz to 30mhz (3) temperature: 25c r1141q151x r1141q281x 100 10 1 0.1 0.01 output current i out (ma) 060 30 120 esr ( ? ) 90 f=10h z to 2mh z , c in =ceramic 1.0 f, c out =ceramic 2.2 f 100 10 1 0.1 0.01 060 30 120 90 f=10h z to 2mh z , c in =ceramic 1.0 f, c out =ceramic 2.2 f output current i out (ma) esr ( ? )

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