unisonic technologies co., ltd R1MX55 linear integrated circuit www.unisonic.com.tw 1 of 8 copyright ? 2008 unisonic technologies co., ltd qw-r101-023.b voltage regulator ? description as the utc linear intergrated ldo, the R1MX55 shows a high current, high accuracy, low-dropout voltage. the feature are: low dropout voltage, very low ground current. cause the series have been designed for high current loads, so they are also used in lower current, extremely low dropout-critical systems (in which their tiny dropout volt age and ground current values are important attributes). ? features * built-in on/off function, * over current protection function, * over heat protection function * adjustable dc output voltage * 30ma / 2.44v output low dropout voltage regulator lead-free: R1MX55l halogen-free: R1MX55g ? ordering information ordering number normal lead free halogen free package packing R1MX55-ab5-r R1MX55l-ab5-r R1MX55g-ab5-r sot-89-5 tape reel R1MX55l-ab5-r (1)packing type (2)package type (3)lead plating (1) r: tape reel (2) ab5: sot-89-5 (3) g: halogen free, l: lead free, blank: pb/sn
R1MX55 linear integrated circuit unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r101-023.b ? pin descriptions pin no. pin name function 1 v adj output voltage adjustment 2 gnd ground 3 v c on/off control 4 v in dc input 5 v out dc output
R1MX55 linear integrated circuit unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r101-023.b ? block diagram v out v adj gnd v c v in 4 1 2 3 5 on/off vref otp ocp block for fixed version v out v adj gnd v c v in 4 1 2 3 5 on/off vref otp ocp block for adjustable version
R1MX55 linear integrated circuit unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r101-023.b ? absolute maximum ratings parameter symbol ratings units input voltage (note 2) v in 9 v on/off control voltage (note 2) v c 9 v output adiustment pin voltage (note 2) v adj 5 v output current i out 500 ma power dissipation p d 900 mw junction temperature t j 150 c operating temperature t opr -40 ~ +85 c storage temperature t stg -55 ~ +150 c note: 1. 2. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. all are open except gnd and applicable terminals. ? electrical characteristics (v in =3.5v, v out =2.44v (r 1 =r 2 =100k ? ), i out =30ma, v c =1.8v, t a =25c, unless otherwise specified) parameter symbol conditions min typ max units input voltage v in 2.6 9.0 v output voltage v out 1.3 5.0 v load regulation v out i out =5~500ma 10 100 mv line regulation v out v in =3.5~8.5v 6 20 mv ripple rejection rr 55 db dropout voltage v d i out =500ma 0.7 v reference voltage v ref 1.196 1.22 1.244 v temperature coefficient of output voltage t c v out t j =25 ~ 75c, i out =10ma 0.1 mv/c output noise voltage v no(rms) 10h z < f < 100kh z 100 v on-state voltage for control v c(on) (note) 1.8 v on-state current for control i c(on) v c =1.8v 20 70 a off-state voltage for control v c(off) 0.4 v quiescent current i q i out =0a 0.8 1.2 ma output off-state consumption current i qs v c =0.2v 1 a note: in case that the control termi nal (3th pin) is non-connection, out put voltage should be off state.
R1MX55 linear integrated circuit unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r101-023.b ? typical application circuit 1 3 5 3 r 2 r 1 c o 1 f v out load c i 1 f v in dc input on-off single high:output on low or open:output off 2 4 5 1 R1MX55
R1MX55 linear integrated circuit unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r101-023.b ? electrical characteristics measuring circuit
R1MX55 linear integrated circuit unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r101-023.b ? typical characteristics 690 670 660 junction temperature, t j (c) 680 700 710 720 730 quiescent current vs. junction temperature (typical values) 650 640 85 105 125 25 45 65 -15 5 -25 v in =4.3v, v c =1.8v, i out =0a, c i =c o =1u (ceramic capacitor) output current, i out (ma) esr vs. output current 0.1 0.5 1 10 100 110 50 20 200 c o =1f v in =5v, v c =1.8v, c i =1f, v out =2.44v, t a =25 500 stable zone vibrating
R1MX55 linear integrated circuit unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r101-023.b ? typical characteristics(cont.) time(s) load transient response 0 -50 50 100 -100 50 500 0 100 200 300 400 500 600 700 800 900 1000 time(s) line transient response 0 -200 100 200 -100 0 1 0 100 200 300 400 500 600 700 800 900 1000 t a =25 ,v c =1.8v, c i =c o =1u (ceramic capacitor) t a =25 ,v in =5v, v c =1.8v, i ol =50ma, c i =c o =1u (ceramic capacitor) utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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