unisonic technologies co., ltd ur1171 preliminary cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2013 unisonic technologies co., ltd qw-r502-a33.a 1.5a ldo regulator ? description the utc ur1171 is a typical ldo (linear regulator) with the features of high output voltage accuracy, low supply current, low on-resistance, and high ripple rejection. during operation of the utc ur1171 , the dropout voltage is very low and the response of li ne transient and load transient are very well. internally, there?re many functions of utc ur1171 which can be seen in the block figure. there are a voltage reference unit, an error amplifier, resistor-net for volt age setting, a current limit circuit, and a chip enable circuit in each utc ur1171 . the utc ur1171 can be used as an ideal of the power supply for hand-held communication equipment, such as: power source for portable communication equipment, power source for electrical appliances, for example, cameras, vcrs and camcorders and power source for battery-powered equipment. ? features * low standby current (typ=0.1a) * supply current (typ=80a) * output current (min=1.5a@v in =v out +1.0v) * output voltage accuracy (2.0%) * output voltage (1.2v~5.0v) * low dropout voltage (typ=0.09v@v out =3.0v, i out =300ma) * line regulation (typ=0.05%/v) * low temperature-drift coefficient of output voltage * built-in thermal shunt circuit * built-in current limit circuit sop-8 ? ordering information ordering number package packing lead free halogen free ur1171xxl-s08-t ur1171xxg-s08-t sop-8 tube ur1171xxl-s08-r ur1171xxg-s08-r sop-8 tape reel ur1171xxl-s08-t (1)packing type (2)package type (3)lead free (1) t: tube, r: tape reel (2) s08: sop-8 (3) l: lead free, g: halogen free (4) ah: 1.5a/active high (4)enable threshold level
ur1171 preliminary cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-a33.a ? pin configuration ? pin description pin no. pin name description 1 v out output pin 2, 5 gnd ground pin 3 ce chip enable pin 4, 7, 8 nc no connection 6 v dd input pin ? block diagram v dd 6 3 5 2 1 ce gnd v out - + vref current limit and otp gnd
ur1171 preliminary cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-a33.a ? absolute maximum rating parameter symbol ratings unit input voltage v in 7.0 v input voltage(ce or ce input 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 3.5 a power dissipation p d 606 mw operating temperature t opt -40~85 c storage temperature t stg -55~125 c note: absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics (t a =25c, unless otherwise specified) ur1171ah parameter symbol test conditions min typ max unit input voltage v in 6.0 v supply current i ss v in -v out =1.0v, v ce =v in 80 160 a standby current i stb v in -v out =1.0v, v ce =0v 0.1 2.0 a output voltage v out v in -v out =1.0v, i out =200ma x0.98 x1.02 v output current i out v in -v out =1.0v 1.5 a load regulation ? v out / ? i out v in -v out =1.0v, 1ma i out 300ma 10 60 mv dropout voltage v dif i out =300ma, v out =1.5 v out <1.6 0.16 0.35 v i out =300ma, v out =1.6 v out <1.7 0.14 0.32 v i out =300ma, v out =1.7 v out <1.8 0.13 0.28 v i out =300ma, v out =1.8 v out <2.0 0.12 0.24 v i out =300ma, v out =2.0 v out <2.5 0.10 0.21 v i out =300ma, v out =2.5 v out 5.0 0.09 0.18 v line regulation 1.5 v out <1.6 ? v out / ? v in i out =200ma, v out =2.1v v in <6.0v 0.05 0.30 %/v 1.6 v out 5.0 i out =200ma, v out +0.5v v in 6.0v ripple rejection 1.5 v out <4.7 rr f=1khz, ripple 0.5 v p-p ,v in ? v out =1.0v 50 db 4.7 v out 5.0 f=1khz, ripple 0.5v p-p , v in =5.75v output voltage temperature coefficient ? v out / ? t i out =10ma, -40c t a 85c 100 ppm /c short current limit i lim v out =0v 200 ma pull-down resistance for ce pin r pd 2.5 5.0 10.0 m ? ce input voltage ?h? v ceh 1.5 v in v thermal shutdown detector threshold temperature t tsd junction temperature 150 c thermal shutdown released temperature t tsr junction temperature 120 c
ur1171 preliminary cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-a33.a ? test circuit
ur1171 preliminary cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-a33.a ? typical application circuit 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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