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rx5rz series low dropout and low noise voltage regulator no. ea-039-111020 1 outline the rx5rz series are cmos-based voltage regulator ics with high output voltage accuracy, low supply current, low dropout voltage and high ripple rejection. each of these voltage regulator ics consists of a voltage reference unit, an error amplifier, output voltage setting resistors, a current limit circuit and a chip enable circuit. (provided two types of chip enable circuit ; ?h? active and ?l? active, that can be selected when order.) for a/b version. the output voltage of these ics is fixed with high accuracy. in addition to low supply current from cmos process, the rx5rz series may lengthen battery life through low dropout voltage and chip enable function thanks to the built -in low on resistance transistor. also when compared with conventional regulators that employ cmos process, these ics have superior ripple rejection, input transient response characteristic and load transient response char acteristic thus making these product suitable for power supply for hand-held communication equipment. since the package for these ics are the sot-23-5 pa ckage and sot-89, high density mounting of the ics on boards is possible. features ? supply curre nt ............................................................. typ. 20 a ? supply current (s tandby) ........................................... ty p. 0.1 a ? output voltage accuracy.............................................. 2% ? ripple reject ion........................................................... typ. 55db (f=1khz) ? dropout voltage ........................................................... typ. 0.2v (i out = 60ma) ? temperature-drift coefficient of output voltage .......... typ. 100ppm/ c ? line regulation ............................................................ typ. 0.05%/v ? output voltage range.................................................. 2.0v to 6.0v (0.1v steps) ( for other voltages, please refer to mark informations.) ? packages ..................................................................... sot-23-5 (mini-mold), sot-89 (mini-power mold) ? built-in fold-back protection ci rcuit ............................ current limit typ. 50ma applications ? power source for battery-powered equipment ? power source for hand-held communication equipment, cameras, and vcrs ? power source for home appliances
rx5rz 2 block diagrams rn5rzxxaa rn5rzxxba 2 5 1 v out gnd v dd ce vref 3 current limit + ? 2 5 1 v out gnd v dd ce + ? vref 3 current limit rh5rzxxca 2 1 v out gnd v dd vref 3 current limit + ? selection guide the output voltage and package for the ics can be selected at the user?s request. product name package quantity per reel pb free halogen free rn5rzxx ? a-tr-fe sot-23-5 3,000 pcs yes yes rh5rzxxca-t1-fe sot-89 1,000 pcs yes yes xx : the output voltage can be designated in the range from 2.0v (20) to 6.0v (60) in 0.1v steps. (for other voltages, please refer to mark informations.) ? : ce pin polarity are options as follows (a) "l" active (b) "h" active (c) without chip enable
rx5rz 3 pin configuration z sot-23-5 z sot-89 1 4 5 2 3 (mark side) 3 12 (mark side) pin description x sot-23-5 pin no symbol pin description 1 gnd ground pin 2 v dd input pin 3 v out output pin 4 nc no connection (only rn5rzxxa/b) 5 ce or ce chip enable pin (only rn5rzxxa/b) x sot-89 pin no symbol pin description 1 gnd ground pin 2 v in input pin 3 v out output pin
rx5rz 4 absolute maximum ratings symbol item rating unit v in input voltage 9.0 v v ce input voltage ( ce or ce) ? 0.3 to v in + 0.3 v v out output voltage ? 0.3 to v in + 0.3 v i out output current 150 ma power dissipation ? (sot-23-5) 420 p d power dissipation ? (sot-89) 900 mw t opt operating temperature range ? 40 to 85 c t stg storage temperature range ? 55 to 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. 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.
4 rx5rz electrical characteristics rn5rzxxa series symbol item conditions min. typ. max. unit v out output voltage v in =v out +1v, i out =30ma 0.98 1.02 v i out output current v in =v out +1v 100 ma when v out =v out 0.1v ?v out load regulation v in =v out +1v 20 40 mv ?i out 1mai out 80ma v dif dropout voltage i out =60ma 0.2 0.3 v i ss supply current v in =v out +1v 20 40 a istandby supply current (standby) v in =v ce =v out +1v 0.1 1.0 a ?v out line regulation i out =30ma 0.05 0.20 %/v ?v in v out +0.5v v in 8.0v rr ripple rejection f=1khz, ripple 0.5vrms 55 db v in =v out +1v v in input voltage 8v ?v out output voltage i out =30ma 100 ppm/?c ? topt temperature coefficient 40?c topt85?c i lim 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 v cel ce input voltage l 0.00 0.25 v topt=25 ? c
5 rx5rz rn5rzxxb series symbol item conditions min. typ. max. unit v out output voltage v in =v out +1v, i out =30ma 0.98 1.02 v i out output current v in =v out +1v 100 ma when v out =v out 0.1v ?v out load regulation v in =v out +1v 20 40 mv ? i out 1ma i out 80ma v dif dropout voltage i out =60ma 0.2 0.3 v i ss supply current v in =v out +1v 20 40 a istandby supply current (standby) v in =v out +1v, v ce =gnd 0.1 1.0 a ? v out line regulation i out =30ma 0.05 0.20 %/v ? v in v out +0.5v v in 8.0v rr ripple rejection f=1khz, ripple 0.5vrms 55 db v in =v out +1v v in input voltage 8v ? v out output voltage i out =30ma 100 ppm/?c ?topt temperature coefficient 40?c topt 85?c i lim short current limit v out =0v 50 ma r pu ce pull-down resistance 2.5 5.0 10.0 m ? v ceh ce input voltage h 1.5 v v cel ce input voltage l 0.00 0.25 v topt=25 ? c rh5rzxxc series symbol item conditions min. typ. max. unit v out output voltage v in =v out +1v, i out =30ma 0.98 1.02 v i out output current v in =v out +1v 100 ma ?v out load regulation v in =v out +1v 20 40 mv ? i out 1ma i out 80ma v dif dropout voltage i out =60ma 0.2 0.3 v i ss supply current v in =v out +1v 20 40 a ? v out line regulation i out =30ma 0.05 0.20 %/v ? v in v out +0.5v v in 8.0v rr ripple rejection f=1khz, ripple 0.5vrms 55 db v in =v out +1v v in input voltage 8v ? v out output voltage i out =30ma 100 ppm/?c ?topt temperature coefficient 40?c topt 85?c i lim short current limit v out =0v 50 ma topt=25 ? c
6 rx5rz operation test circuits 2 5 1 v out gnd v dd ce vref 3 current limit r1 r2 2 5 1 v out gnd v dd ce + vref 3 current limit r1 r2 error amp. error amp. + rn5rzxxa rn5rzxxb 2 1 v out gnd v dd vref 3 current limit r1 r2 + rh5rzxxc in these ics, the output voltage v out is detected by feed-back registers r1, r2, and the detected output voltage is compared with a reference voltage by an error amplifier, so that a constant voltage is output. a current limit circuit working for short protection and a chip enable circuit for standby function are included. 23 1 5 v dd v out gnd rn5rzxxb series c1 : 1f c2 : 10f c1v in c2 i out ce 23 1 5 v dd v out rn5rzxxb series c1 : 1f c2 : 10f c1 v in c2 a gnd ce fig.1 standard test circuit fig.2 supply current test circuit
7 rx5rz 23 1 5 v dd v out rn5rzxxb series c1 : 10f v in c1 i out p .g. gnd ce fig.3 line transient response test circuit 23 1 5 v dd v out rn5rzxxb series c1 : 1f c2 : 10f c1v in c2 l1 l2 gnd ce fig.4 load transient response test circuit 23 1 5 v dd v out rn5rzxxb series c1 : 1f c2 : 10f c1 v in c2 i out gnd ce fig.5 ripple rejection test circuit
8 rx5rz typical characteristics 1) output voltage vs. output current rx5rz30x 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 output current i out (ma) output voltage v out (v) 0 100 200 300 400 500 3.5v 4.0v 5.0v v in =3.3v rx5rz40x 5.0 4.5 4.0 3.5 3.0 2.5 1.5 1.0 2.0 0.5 0.0 output current i out (ma) output voltage v out (v) 0 100 200 300 400 500 4.5v 5.0v 6.0v v in =4.3v rx5rz50x 6.0 5.0 4.0 3.0 2.0 1.0 0.0 output current i out (ma) output voltage v out (v) 0 100 200 300 400 500 6.0v 5.5v 7.0v v in =5.3v rx5rz30x input voltage v in (v) output voltage v out (v) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 2.0 4.0 8.0 6.0 i out =0ma i out =30ma i out =50ma rx5rz40x input voltage v in (v) output voltage v out (v) 5.0 4.0 3.0 2.0 1.0 0.0 0.0 2.0 4.0 8.0 6.0 i out =0ma i out =30ma i out =50ma 2) output voltage vs. input voltage
9 rx5rz 3) dropout voltage vs. output current rx5rz50x input voltage v in (v) output voltage v out (v) 6.0 5.0 4.0 3.0 2.0 1.0 0.0 0.0 2.0 4.0 6.0 8.0 i out =0ma i out =30ma i out =50ma rx5rz30x 0.30 0.25 0.20 0.15 0.10 0.05 0.00 output current i out (ma) dropout voltage v dif (v) 0 20406080100 topt= 40? c topt=25? c topt=85? c rx5rz40x 0.30 0.25 0.20 0.15 0.10 0.05 0.00 output current i out (ma) dropout voltage v dif (v) 0 20406080100 topt= 40? c topt=25? c topt=85? c rx5rz50x 0.30 0.25 0.20 0.15 0.10 0.05 0.00 output current i out (ma) dropout voltage v dif (v) 0 20406080100 topt= 40? c topt=25? c topt=85? c 0.35
10 rx5rz 4) output voltage vs. temperature 5) supply current vs. input voltage rx5rz30x 3.10 3.05 3.00 2.95 2.90 temperature topt(? c) output voltage v out (v) 50 0 50 100 rx5rz40x 4.10 4.05 4.00 3.95 3.90 temperature topt(? c) output voltage v out (v) 50 0 50 100 rx5rz50x 5.10 5.05 5.00 4.95 4.90 temperature topt(? c) output voltage v out (v) 50 0 50 100 rx5rz30x 30 25 20 15 10 5 0 input voltage v in (v) supply current i ss (a) 0.0 2.0 4.0 8.0 6.0 rx5rz40x 30 25 20 15 10 5 0 input voltage v in (v) supply current i ss (a) 0.0 2.0 4.0 8.0 6.0
11 rx5rz 6) supply current vs. temperature rx5rz50x 30 25 20 15 10 5 0 input voltage v in (v) supply current i ss (a) 0.0 2.0 4.0 8.0 6.0 rx5rz30x 30 25 20 15 10 5 0 temperature topt(? c) supply current i ss (a) 50 0 50 100 rx5rz40x 30 25 20 15 10 5 0 temperature topt(? c) supply current i ss (a) 50 0 50 100 rx5rz50x 30 25 20 15 10 5 0 temperature topt(? c) supply current i ss (a) 50 0 50 100
12 rx5rz 8) ripple rejection vs. frequency rx5rz30x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 2.2f i out =1ma i out =30ma i out =50ma 7) dropout voltage vs. set output voltage rx5rzxxx 0.35 0.30 0.25 0.20 0.15 0.10 0.00 0.05 set output voltage vreg(v) dropout voltage v dif (v) 234 6 5 topt=25?c i out =10ma i out =30ma i out =50ma i out =100ma rx5rz30x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 4.7f i out =1ma i out =30ma i out =50ma rx5rz30x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 10f i out =1ma i out =30ma i out =50ma rx5rz40x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 2.2f i out =1ma i out =30ma i out =50ma
13 rx5rz rx5rz40x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 4.7f i out =1ma i out =30ma i out =50ma rx5rz40x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 10f i out =1ma i out =30ma i out =50ma rx5rz50x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 2.2f i out =1ma i out =30ma i out =50ma rx5rz50x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 4.7f i out =1ma i out =30ma i out =50ma rx5rz50x 80 70 60 50 40 30 20 0 10 frequency f(kh z ) ripple rejection rr(db) 0.1 1 10 100 c out =tantal 10f i out =1ma i out =30ma i out =50ma
14 rx5rz 10) line transient response 3.4 3.3 3.2 3.1 3.0 2.9 2.8 6 5 4 3 2 1 0 time t( s ) output voltage v out (v) input voltage v in (v) 10 0 20 405060708090100 30 t r =t f =5 s c out =ceramic 2.2f+esr 1? input voltage output voltage 9) ripple rejection vs. input voltage (dc bias) rx5rz30x 70 60 50 40 30 20 0 10 input voltage v in (v) ripple rejection rr(db) 3.1 3.2 3.3 3.5 3.4 i out =1ma c out =tantal 10f f=400hz f=1khz f=10khz rx5rz30x 70 60 50 40 30 20 0 10 input voltage v in (v) ripple rejection rr(db) 3.1 3.2 3.3 3.5 3.4 f=400hz f=1khz f=10khz i out =10ma c out =tantal 10f rx5rz30x 70 60 50 40 30 20 0 10 input voltage v in (v) ripple rejection rr(db) 3.1 3.2 3.3 3.5 3.4 i out =50ma c out =tantal 10f f=400hz f=1khz f=10khz
15 rx5rz 11) load transient response 3.4 3.3 3.2 3.1 3.0 2.9 2.8 6 5 4 3 2 1 0 time t( s ) output voltage v out (v) input voltage v in (v) 10 0 20 405060708090100 30 t r =t f =5 s c out =tantal 3.3f input voltage output voltage 3.4 3.3 3.2 3.1 3.0 2.9 2.8 6 5 4 3 2 1 0 time t( s ) output voltage v out (v) input voltage v in (v) 10 0 20 405060708090100 30 t r =t f =5 s c out =tantal 10f input voltage output voltage 3.4 3.3 3.2 3.1 3.0 2.9 2.8 150 100 50 0 50 100 150 time t( s ) output voltage v out (v) output current i out (ma) 10 0 20 405060708090100 30 c out =ceramic 2.2f+1? output current output voltage
16 rx5rz 3.4 3.3 3.2 3.1 3.0 2.9 2.8 150 100 50 0 50 100 150 time t( s ) output voltage v out (v) output current i out (ma) 10 0 20 405060708090100 30 c out =tantal 2.2f output current output voltage 3.4 3.3 3.2 3.1 3.0 2.9 2.8 150 100 50 0 50 100 150 time t( s ) output voltage v out (v) output current i out (ma) 10 0 20 405060708090100 30 c out =tantal 3.3f output current output voltage 3.4 3.3 3.2 3.1 3.0 2.9 2.8 150 100 50 0 50 100 150 time t( s ) output voltage v out (v) output current i out (ma) 10 0 20 405060708090100 30 c out =tantal 10f output current output voltage
17 rx5rz countermeasure for noise for stable operation 23 1 5 v in ceramic capacitor spectrum analyzer v out i out rn5rzxxb series esr v in s.a. ceramic capacitor 0.01 f gnd ce the relationship between output current (i out ) and equivalent series resistance (esr) in the output capacitor is described in the graphs below. the conditions when the noise level is under 40v (avg.) are indicated by the hatched area in the graph. [measuring conditions] frequency band : 0hz to 1mhz temperature : 25 ?c measuring circuit for white noise ; rn5rz30b ceramic capacitor 1f 100.0 10.0 1.0 0.1 0.0 output current i out (ma) esr(w) 0.0 20.0 40.0 60.0 80.0 100.0 : noise level is under 40v ceramic capacitor 2.2f 100.0 10.0 1.0 0.1 0.0 output current i out (ma) esr(w) 0.0 20.0 40.0 60.0 80.0 100.0 : noise level is under 40v
18 rx5rz ceramic capacitor 4.7f 100.0 10.0 1.0 0.1 0.0 output current i out (ma) esr(w) 0.0 20.0 40.0 60.0 80.0 100.0 : noise level is under 40v ceramic capacitor 10f 100.0 10.0 1.0 0.1 0.0 output current i out (ma) esr(w) 0.0 20.0 40.0 60.0 80.0 100.0 : noise level is under 40v application hints when using these ics, be sure to take care regarding the following points : in these ics, phase compensation is made for securing stable operation even when the load current is var- ied. for this purpose, be sure to use a capacitor c out with good frequency characteristics and esr in the range described above. make v dd and gnd lines sufficient. if their impedance is high, the noise picked up or unstable operation may result. connect the capacitor with a capacitance of about 1f between v dd and gnd with wiring as short as possi- ble. set external components as close as possible to the ics and make wiring as short as possible.
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