unisonic technologies co., ltd l1183a preliminary cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-315.g 300ma cmos ldo ? description the utc l1183a is a coms positive linear regulator. one of it?s feature is the very low quie scent current typical as low as 30 a and its dropout voltage is extremely low with 300ma output current. the internal circuit includes thermal shutdown and current fold-back to prevent device failure when the circuit is operated in the bad conditions. in application, the utc l1183a needs a low noise, regulated supply. for stable operation, the ou tput capacitance value should be 2.2 f or more. the utc l1183a is an ideal for battery applications, such as instrumentations, portable electronics, wireless devices, cordless phones, pc peripherals, and battery powered widgets. ? features * accurate to within 1.5% * quiescent current: 30 a * internal over-temperature shutdown * with current limiting * internal short circuit current fold-back * has power-saving shutdown mode * very low temperature coefficient ? ordering information ordering number package packing lead free halogen free L1183AL-XX-AF5-R l1183ag-xx-af5-r sot-25 tape reel l1183al-xx-ag6-r l1183ag-xx-ag6-r sot-26 tape reel note: xx: output voltage, re fer to marking information.
l1183a preliminary cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-315.g ? marking information package voltage code marking sot-25 15 :1.5v 28 :2.8v 31 :3.1v 33 :3.3v sot-26 sxx a 123 4 5 6 voltage code g: halogen free l: lead free ? pin configuration sot-25 sot-26 ? pin description package pin no. pin name description sop-25 1 v in input for voltage input. a 1f or greater capacitor should be placed in this pin. 2 gnd ground. 3 en enable pin. pulling his pin low, can shut down the pmos pass transistor, and the current consum ing can be set less than 1a. 4 nc 5 v out output voltage pin. the capacitor which connected between this pin and gnd should be decoupled with a 1f or a greater value low esr ceramic capacitor. sop-26 1 sense remote sense. 2 gnd ground. 3 byp bypass capacitor for noise reduction. 4 en enable input. 5 v dd supply input. 6 v out output voltage. 3 2 1 4 5 en gnd v in v out nc
l1183a preliminary cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-315.g ? block diagram r1 r2 + - overcurrent shutdown thermal shutdown amp gnd v out v ref =1.215v en nc v in
l1183a preliminary cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-315.g ? absolute maximum rating (unless otherwise specified) parameter symbol ratings unit input voltage v in -0.3~ +8 v input voltage (en,byp) -0.3~ +8 v output voltage v out -0.3~ v in +0.3 v output voltage i out p d / (v in - v out ) ma power dissipation p d 400 mw junction temperature t j 150 c storage temperature t stg -65 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device operation is not implied. ? recommended operating conditions parameter symbol ratings unit ambient temperature t a - 40 ~ +85 c junction temperature t j +125 c storage temperature t stg -65 ~ +125 c ? thermal data parameter symbol ratings unit junction to ambient ja 280 c/w junction to case (note) jc 140 c/w note: jc on center of molding compound if ic has on tab
l1183a preliminary cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-315.g ? electrical characteristics (t a = 25c, unless otherwise specified) parameter symbol test conditions min typ max unit input voltage v in note1 6.5 v line regulation out out v v v in =v out +1~v out +2 i out =1ma 1.2v v out 1.4v -0.2 0.2 % 1.4v < v out 2.0v -0.15 0.15 % 2.0v < v out < 4.0v -0.1 0.02 0.1 % load regulation out out v v i out =1ma~300ma -1 0.2 1 % output voltage accuracy i out =1ma -1.5 1.5 % i out =300ma -2.5 2.5 % quiescent current i q i out =0ma 30 50 a dropout voltage v d i out =300ma v out =v o(nom) -2.0% 1.2v v o ( nom ) 2.0v 1300 mv 2.4v 1.2v 300 ma current limit i limit v out > 1.2v 300 450 ma short circuit current (note2) i sc v out < 0.8v 150 300 ma ground pin current i gnd i out =1ma ~300ma 35 a over temperature shutdown ots 150 c over temperature hysteresis oth 30 c temperature coefficient of output voltage t c v o 30 ppm/c en input threshold v eh v in =2.7v~6.5v 2.0 v in v v el v in =2.7v~6.5v 0 0.4 v en input bias current i eh v en =v in , v in =2.7v~6.5v 0.1 a i el v en =0v, v in =2.7v~6.5v 0.5 a shutdown supply current i sd v in =5v, v o =0v, v en l1183a preliminary cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-315.g ? 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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