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300ma low voltage ldo regulator r1131x series no. ea-116-0503 1 outline the r1131x series are cmos-based low voltage regulat or ics with output voltage range from 0.8v to 3.3v. the minimum operating voltage is 1.4v. each of these vo ltage regulator ics consists of a voltage reference unit, an error amplifier, resistors for setting output volt age, a current limit circuit, and a chip enable circuit. to prevent the destruction by over cu rrent, current limit circuit is included. standby mode realizes ultra small consumption current. the output voltage of these ics is internally fixed with high accuracy. since the packages for these ics are sot-23-5, son-6, and hson-6, high density m ounting of the ics on boards is possible. features ? ultra-low supply current .................................typ. 80 a (v out <1.8v), typ. 60 a (v out > = 1.8v) ? standby m ode ...................................................typ. 0.1 a ? low dropout voltage .........................................typ. 0.48v(i out = 300ma output voltage = 1.0v type) typ. 0.31v(i out = 300ma output voltage = 1.5v type) typ. 0.23v(i out = 300ma output voltage = 3.0v type) ? high ripple reject ion .......................................typ. 65db(f = 1khz) ? low temperature-drift coefficient of output voltage typ. 100ppm/ c ? excellent line regulat ion .................................typ. 0.01%/v ? high output vo ltage accu racy .......................... 2.0% ? small package ................................................sot-23-5(s uper mini-mold), son-6, hson-6 ? output voltage ..................................................st epwise setting with a step of 0.1v in the range of 0.8v to 3.3v is possible ? input voltage ..................................................... min. 1.40v ? built-in fold-back protecti on circuit ....................typ. 50ma (c urrent at short mode) ? external ca pacitors...........................................c in = c out = tantalum 1.0 f (v out <1 . 0v) c in = c out = ceramic 1.0 f (v out > = 1. 0v) applications ? precision voltage references. ? power source for electrical appliances such as cameras, vcrs and hand-held communication equipment. ? power source for battery-powered equipment.
r1131x 2 block diagram r1131xxxxa r1131xxxxb v dd v out ce gnd current limit vref v out gnd v dd ce vref current limit + - r1131xxxxd v out gnd v dd ce vref current limit + - selection guide the output voltage, the chip enable polarity, package ty pe, and the taping type for the ics can be selected at the user's request. the selection can be available by designating the part number as shown below; r1131xxx xx -xx part number a b a'c d code contents a, a' designation of package type : r1131nxx1x-xx:sot-23-5 (mini-mold) r1131dxx1x-xx:son-6, r1131dxx2x-xx:hson-6 b setting output voltage (v out ):stepwise setting with a step of 0.1v in the range of 0.8v to 3.3v is possible. if the output = 1.85v, then the code is r1131x18xx5. if the output = 2.85, then the code is r1131x28xx5. c designation of chip enable option : a:?l? active type. b:?h? active type. d:"h" active and with auto discharge function d designation of taping type : tr refer to taping specifications
r1131x 3 pin configurations sot-23-5 son-6 hson-6 12 3 54 (mark side) 1 2 3 6 5 4 654 123 pin descriptions ? sot-23-5 pin no symbol pin description 1 v dd input pin 2 gnd ground pin 3 ce or ce chip enable pin 4 nc no connection 5 v out output pin ? son-6, hson-6 pin no symbol pin description 1 v dd input pin 2 nc no connection 3 v out output pin 4 nc no connection 5 gnd ground pin 6 ce or ce chip enable pin ? tabs and tab suspension leads could be short to the gnd level.
r1131x 4 absolute maximum ratings symbol item rating unit v in input voltage 6.5 v v ce input voltage( ce /ce pin) ? 0.3 ~ 6.5 v v out output voltage ? 0.3 ~ v in + 0.3 v i out output current 350 ma power dissipation(sot23-5) power dissipation(son-6) 250 p d power dissipation(hson-6) 400 mw topt operating temperature range ? 40 ~ 85 c tstg storage temperature range ? 55 ~ 125 c electrical characteristics ? r1131xxxxa topt = 25 c symbol item conditions min. typ. max. unit v out output voltage v in = ? set v out + 1v 1 a < = < = 0.98 ( ? 30mv) v out 1.02 (30mv) v i out output current v in ? v out = ? 1.0v 300 ma ? v out / ? i out load regulation v in = set v out + 1v, 1ma < = < = = set v out + 1v,v out <1.8v 80 111 a i ss1 supply current v in = set v out + 1v,v out > = 1.8v 60 90 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 set v out < 0.9v: 1.4v < = < = = 1khz, ripple 0.2vp-p v in = set v out + ? 1v,i out = 30ma 65 db v in input voltage 1.4 6.0 v ? v out / ? t output voltage temperature coefficient i out = 30ma ? 40 c < = < = c 100 ppm / c i lim short current limit v out = 0v 50 ma r pu ce pull-up resistance 1.87 5.00 12.00 m ? v ceh ce input voltage ?h? 1.0 6.0 v v cel ce input voltage ?l? 0.0 0.3 v v en output noise bw = ? 10hz to 100khz 30 vrms note1: 30mv tolerance for v out < = 1.5v.
r1131x 5 ? r1131xxxxb/d topt = 25 c symbol item conditions min. typ. max. unit v out output voltage v in = set v out + 1v 1 a < = < = 0.98 ( ? 30mv) v out 1.02 (30mv) v i out output current v in ? v out = 1.0v 300 ma ? v out / ? i out load regulation v in = set v out +1v 1ma < = < = = set v out +1v,v out <1.8v 80 111 a i ss1 supply current v in = set v out +1v,v out > = 1.8v 60 90 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 set v out <0.9v: 1.4v < = < = = 1khz, ripple 0.2vp-p v in = set v out +1v,i out = 30ma 65 db v in input voltage 1.4 6.0 v ? v out / ? t output voltage temperature coefficient i out = 30ma ? 40 c < = < = c 100 ppm / c i lim short current limit v out = 0v 50 ma r pdc ce pull-down resistance 1.87 5.00 12.00 m ? v ceh ce input voltage ?h? 1.0 v in v v cel ce input voltage ?l? 0.0 0.3 v v en output noise bw = 10hz to 100khz 30 vrms r low nch on resistance for auto discharge (applied to d version only) v ce = 0v 60 ? note1: 30mv tolerance for v out < = 1.5v. electrical characteristics by output voltage topt = 25 c dropout voltage v dif (v) v dif output voltage v out (v) condition typ. max. 0.8 = v out 0.620 0.850 0.9 = v out 0.550 0.780 1.0 < = v out < = 1.5 0.480 0.700 1.5 < = v out < = 2.6 0.310 0.450 2.6 < = v out i out = 300ma 0.230 0.350
r1131x 6 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 1.0 f or more capacitor c out with good frequency characteristics and esr (equivalent series resistance). (note: if a tantalum capacitor is connected to the output pin for phase compensation, if the esr value of the capacitor is too large, the operation mi ght be unstable. because of this, test these ics with as same external components as ones to be used on the pcb.) chip capacitor characteristics of bias dependence an d temperature characteristics may vary depending on its size, manufacturer, and part number. pcb layout make v dd and gnd lines sufficient. if their impedance is high, pick-up the noise or unstable operation may result. connect a capacitor with as much as 1.0mf capacitor between v dd and gnd pin as close as possible. set external components, especially t he output capacitor, as close as possi ble to the ics, and make wiring as short as possible. typical application v dd gnd ce out r1131xxxxx series a i out c2 c1 v in external components examples: cm05x5r105k06ab (kyocera) c1005jboj105k (tdk) grm155b30j105ke18b (murata) output capacitor; 1.0 f or more capacity ceramic type (if v out <1.0v, tantalum type is recommended) input capacitor, 1.0 f or more capacity ceramic type
r1131x 7 typical characteristics 1) output voltage vs. output current r1131x08xx r1131x15xx 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 100 200 300 400 500 600 output current l out (ma) output voltage v out (v) 1.45v v in =2.8v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 100 200 300 400 500 600 output current l out (ma) output voltage v out (v) 1.8v v in =3.5v r1131x26xx r1131x33xx 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 100 200 300 400 500 600 output current l out (ma) output voltage v out (v) 2.9v v in =4.6v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 100 200 300 400 500 600 output current l out (ma) output voltage v out (v) 3.6v v in =5.3v 2) output voltage vs. input voltage r1131x08xx r1131x15xx 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0123456 input voltage v in (v) output voltage v out (v) i out = 1ma i out =30ma i out =50ma 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 output voltage v out (v) i out = 1ma i out =30ma i out =50ma 0123456 input voltage v in (v)
r1131x 8 r1131x26xx r1131x33xx 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0123456 input voltage v in (v) output voltage v out (v) i out = 1ma i out =30ma i out =50ma 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 output voltage v out (v) i out = 1ma i out =30ma i out =50ma 0123456 input voltage v in (v) 3) supply current vs. input voltage r1131x08xx r1131x15xx 0 10 20 30 40 50 60 70 80 90 100 0123456 input voltage v in (v) supply current i ss h ( a) 0 10 20 30 40 50 60 70 80 90 0123456 input voltage v in (v) supply current i ss h ( a) r1131x26xx r1131x33xx 0 10 20 30 40 50 60 70 80 90 0123456 input voltage v in (v) supply current i ss h ( a) 0 10 20 30 40 50 60 70 80 90 0123456 input voltage v in (v) supply current i ss h ( a)
r1131x 9 4) output voltage vs. temperature r1131x08xx r1131x15xx 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.84 -50 -25 0 25 50 75 100 output voltage v out (v) temperature topt ( ) 1.46 1.47 1.48 1.49 1.50 1.51 1.52 1.53 -50 -25 0 25 50 75 100 output voltage v out h (v) temperature topt ( ) r1131x26xx r1131x33xx 2.57 2.58 2.59 2.60 2.61 2.62 2.63 2.64 -50 -25 0 25 50 75 100 output voltage v out h (v) temperature topt ( ) 3.23 3.25 3.27 3.29 3.31 3.33 3.35 3.37 -50 -25 0 25 50 75 100 output voltage v out h (v) temperature topt ( ) 5) supply current vs. temperature r1131x08xx r1131x15xx 0 10 20 30 40 50 70 110 90 60 100 80 -50 -25 0 25 50 75 100 supply current issh ( a) temperature topt ( ) 0 10 20 30 40 50 60 80 70 -50 -25 0 25 50 75 100 supply current issh ( a) temperature topt ( )
r1131x 10 r1131x26xx r1131x33xx 0 10 20 30 40 50 60 80 70 -50 -25 0 25 50 75 100 supply current issh ( a) temperature topt ( ) 0 10 20 30 40 50 60 80 70 -50 -25 0 25 50 75 100 supply current issh ( a) temperature topt ( ) 6) dropout voltage vs. output current r1131x08xx r1131x09xx 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 50 100 150 200 250 300 output current i out (ma) dropout voltage v dif _h (v) 85 25 -40 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 50 100 150 200 250 300 output current i out (ma) dropout voltage v dif _h (v) 85 25 -40 r1131x10xx r1131x15xx 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 50 100 150 200 250 300 output current i out (ma) dropout voltage v dif _h (v) 85 25 -40 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0 50 100 150 200 250 300 output current i out (ma) dropout voltage v dif _h (v) 85 25 -40
r1131x 11 r1131x26xx r1131x33xx 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0 50 100 150 200 250 300 output current i out (ma) dropout voltage v dif _h (v) 85 25 -40 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0 50 100 150 200 250 300 output current i out (ma) dropout voltage v dif _h (v) 85 25 -40 7) dropout voltage vs. set output voltage (topt = 25 c) r1131xxx1x 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.5 1 1.5 2 2.5 3 3.5 set output voltage vreg (v) dropout voltage v dif _h (v) i out =10ma 50ma 200ma 30ma 100ma 300ma 8) ripple rejection vs. input bias (topt = 25 c c in = none, c out = ceramic 1.0 f ripple 0.2v p-p ) r1131x26xx (i out = 1ma) r1131x26xx (i out = 30ma) 0 10 20 30 40 50 60 70 80 2.6 2.7 2.8 2.9 3.0 3.1 3.2 input voltage v in (v) ripple rejection rr (db) f = 400hz f = 10khz f = 1khz f = 100khz 0 10 20 30 40 50 60 70 80 2.6 2.7 2.8 2.9 3.0 3.1 3.2 input voltage v in (v) ripple rejection rr (db) f = 400hz f = 10khz f = 1khz f = 100khz
r1131x 12 r1131x26xx (i out = 50ma) 0 10 20 30 40 50 60 70 80 2.6 2.7 2.8 2.9 3.0 3.1 3.2 input voltage v in (v) ripple rejection rr (db) f = 400hz f = 10khz f = 1khz f = 100khz 9) ripple rejection vs. frequency (c in = none) r1131x08xx r1131x08xx v in = 1.8v dc +0.2vp-p, c out = tantal 1.0 f v in = 1.8v dc +0.2vp-p, c out = tantal 2.2 f 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma r1131x10xx r1131x10xx v in = 2.0v dc +0.2vp-p, c out = ceramic 1.0 f v in = 2.0v dc +0.2vp-p, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma
r1131x 13 r1131x15xx r1131x15xx v in = 2.5v dc +0.2vp-p, c out = 1.0 f v in = 2.5v dc +0.2vp-p, c out = 2.2 f 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma r1131x26xx r1131x26xx v in = 3.6v dc +0.2vp-p, c out = ceramic 1.0 f v in = 3.6v dc +0.2vp-p, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma r1131x33xx r1131x33xx v in = 4.3v dc +0.2vp-p, c out = ceramic 1.0 f v in = 4.3v dc +0.2vp-p, c out = ceramic 2.2 f 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 frequency f (khz) ripple rejection rr_h (db) i out = 1ma i out = 30ma i out = 50ma
r1131x 14 10) input transient response (c in = none, tr = tf = 5 s) r1131x08xx r1131x10x i out = 30ma, c out = tantalum 1.0 f i out = 30ma, c out = ceramic 1.0 f 0.76 0.78 0.80 0.82 0.84 0.86 0.88 -2 -1 0 1 2 3 4 01020406080100 30 50 70 90 time t ( s) output voltage v out (v) input voltage output voltage input voltage v in (v) 0.96 0.98 1.00 1.02 1.04 1.06 1.08 -2 -1 0 1 2 3 4 01020406080100 30 50 70 90 time t ( s) output voltage v out (v) input voltage output voltage input voltage v in (v) r1131x26xx i out = 30ma, c out = ceramic 1.0 f 2.56 2.58 2.60 2.62 2.64 2.66 2.68 -1 0 1 2 3 4 4 01020406080100 30 50 70 90 time t ( s) output voltage v out (v) input voltage output voltage input voltage v in (v) 11) load transient response (tr = tf = 0.5 s) r1131x08xx r1131x08xx v in = 1.8v c in = tantalum 1.0 f, c out = tantalum 1.0 f v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 2.2 f 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -150 -100 -50 0 50 100 150 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) output voltage load current i out (ma) load current 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -120 -90 -60 -30 0 30 60 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma)
r1131x 15 r1131x10xx r1131x10xx v in = 2.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 2.0v, c in = ceramic 1.0 f, c out = ceramic 2.2 f 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -150 -100 -50 0 50 100 150 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -150 -100 -50 0 50 100 150 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) r1131x10xx r1131x10xx v in = 2.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 2.0v, c in = ceramic 1.0 f c out = ceramic 2.2 f 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -120 -90 -60 -30 0 30 60 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) 0.8 0.9 1.0 1.1 1.2 1.3 1.4 -120 -90 -60 -30 0 30 60 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) r1131x26xx r1131x26xx v in = 3.6v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 3.6v, c in = ceramic 1.0 f c out = ceramic 2.2 f 2.4 2.5 2.6 2.7 2.8 2.9 3.0 -150 -100 -50 0 50 100 150 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) 2.4 2.5 2.6 2.7 2.8 2.9 3.0 -150 -100 -50 0 50 100 150 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma)
r1131x 16 r1131x26xx r1131x26xx v in = 3.6v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 3.6v, c in = ceramic 1.0 f c out = ceramic 2.2 f 2.4 2.5 2.6 2.7 2.8 2.9 3.0 -120 -90 -60 -30 0 30 60 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) 2.4 2.5 2.6 2.7 2.8 2.9 3.0 -120 -90 -60 -30 0 30 60 0 5 10 20 30 40 15 25 35 time t ( s) output voltage v out (v) load current output voltage load current i out (ma) 12) turn on speed with ce pin r1131x08xx r1131x08xx v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 1.0 f v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 1.0 f -2.7 -1.8 -0.9 0.0 0.9 1.8 2.7 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 -30 -20 -10 10 30 50 70 0 204060 time t ( s) ce input voltage v ce (v) output voltage v out (v) v ce =0v 1.8v i out =0ma -2.7 -1.8 -0.9 0.0 0.9 1.8 2.7 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 -30 -20 -10 10 30 50 70 0 204060 time t ( s) ce input voltage v ce (v) output voltage v out (v) v ce =0v 1.8v i out =30ma r1131x08xx r1131x33xx v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 1.0 f v in = 4.3v, c in = ceramic 1.0 f c out = ceramic 1.0 f -2.7 -1.8 -0.9 0.0 0.9 1.8 2.7 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 -30 -20 -10 10 30 50 70 0 204060 time t ( s) ce input voltage v ce (v) output voltage v out (v) v ce =0v 1.8v i out =300ma -10 -8 -6 -4 0 4 -2 2 6 -1 0 1 2 4 6 3 5 7 -60 -40 -20 20 60 100 140 0 40 80 120 time t ( s) ce input voltage v ce (v) output voltage v out (v) v ce =0v 4.3v i out =0ma
r1131x 17 r1131x33xx (eco = h) r1131x33xx (eco = l) v in = 4.3v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 4.3v, c in = ceramic 1.0 f c out = ceramic 1.0 f -10 -8 -6 -4 0 4 -2 2 6 -1 0 1 2 4 6 3 5 7 -60 -40 -20 20 60 100 140 0 40 80 120 time t ( s) ce input voltage v ce (v) output voltage v out (v) v ce =0v 4.3v i out =30ma -10 -8 -6 -4 0 4 -2 2 6 -1 0 1 2 4 6 3 5 7 -60 -40 -20 20 60 100 140 0 40 80 120 time t ( s) ce input voltage v ce (v) output voltage v out (v) v ce =0v 4.3v i out =300ma 13) turn-off speed with ce r1131x08xd r1131x08xd v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 1.0 f v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 1.0 f -1.8 -1.2 -0.6 0.0 1.2 2.4 0.6 1.8 -0.5 0.0 0.5 1.0 2.0 3.0 1.5 2.5 -0.6 -0.4 -0.2 0.2 0.6 1.0 0 0.4 0.8 1.2 time t (ms) ce input voltage v ce (v) output voltage v out (v) v ce =1.8v 0v i out =0ma -1.8 -1.2 -0.6 0.0 1.2 2.4 0.6 1.8 -0.5 0.0 0.5 1.0 2.0 3.0 1.5 2.5 -0.6 -0.4 -0.2 0.2 0.6 1.0 0 0.4 0.8 1.2 time t (ms) ce input voltage v ce (v) output voltage v out (v) v ce =1.8v 0v i out =30ma r1131x08xd r1131x33xd v in = 1.8v, c in = tantalum 1.0 f c out = tantalum 1.0 f v in = 4.3v, c in = ceramic 1.0 f c out = ceramic 1.0 f -1.8 -1.2 -0.6 0.0 1.2 2.4 0.6 1.8 -0.5 0.0 0.5 1.0 2.0 3.0 1.5 2.5 -0.6 -0.4 -0.2 0.2 0.6 1.0 0 0.4 0.8 1.2 time t (ms) ce input voltage v ce (v) output voltage v out (v) v ce =1.8v 0v i out =300ma -5 -4 -3 -2 1 4 -1 3 5 -1 0 1 2 5 8 3 7 0 2 4 6 9 -0.3 -0.2 -0.1 0.1 0.3 0.5 0.7 0 0.2 0.4 0.6 time t (ms) ce input voltage v ce (v) output voltage v out (v) v ce =4.3v 0v i out =0ma
r1131x 18 r1131x33xd r1131x33xd v in = 4.3v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 4.3v, c in = ceramic 1.0 f c out = ceramic 1.0 f -5 -4 -3 -2 1 4 -1 3 5 -1 0 1 2 5 8 3 7 0 2 4 6 9 -0.3 -0.2 -0.1 0.1 0.3 0.5 0.7 0 0.2 0.4 0.6 time t (ms) ce input voltage v ce (v) output voltage v out (v) v ce =4.3v 0v i out =30ma -5 -4 -3 -2 1 4 -1 3 5 -1 0 1 2 5 8 3 7 0 2 4 6 9 -0.3 -0.2 -0.1 0.1 0.3 0.5 0.7 0 0.2 0.4 0.6 time t (ms) ce input voltage v ce (v) output voltage v out (v) v ce =4.3v 0v i out =300ma 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 40 v(avg.) are marked as the hatched area in the graph. (1) frequency band: 10hz to 2mhz (2) temperature: 25 c r1131x08xx r1131x10xx v in = 1.4v to 6.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 1.4v to 6.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f 0.01 0.1 1 10 100 0 50 100 150 200 250 300 output current l out (ma) esr ( ? ) 0.01 0.1 1 10 100 0 50 100 150 200 250 300 output current l out (ma) esr ( ? )
r1131x 19 r1131x26xx r1131x15xx v in = 3.0v to 6.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f v in = 2.0v to 6.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f 0.01 0.1 1 10 100 0 50 100 150 200 250 300 output current l out (ma) esr ( ? ) 0.01 0.1 1 10 100 0 50 100 150 200 250 300 output current l out (ma) esr ( ? ) r1131x33xx v in = 3.6v to 6.0v, c in = ceramic 1.0 f c out = ceramic 1.0 f 0.01 0.1 1 10 100 0 50 100 150 200 250 300 output current l out (ma) esr ( ? )

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