unisonic technologies co., ltd lr1185 preliminary cmos ic www.unisonic.com.tw 1 of 4 copyright ? 2013 unisonic technologies co., ltd qw-r502-a43.a 150m a cmos ldo w ith shutdown and reference bypass ? description the utc lr1185 , a 150ma ldo regulator has very high psrr and super low dropout voltage especially suitable for wireless and portable applications. in the field of hand-held wireless devices, board space and battery life are the main concer ns of designers and end-users. because of the low quiescent current and low esr ceramic capacitors, utc lr1185 can satisfy those concerns. furthermore, low current consumption (50 a), high output accuracy, current limiting protection, and high ripple rejection ratio are advantages of utc lr1185 . ? features * operating voltage ranges : 2.7v~5.5v * dropout : 100mv at 150ma * when ic shutdown: 5ma discharge current of v out * extreme low noise for dsc application * extreme fast response in line/load transient * internal current limiting protection * internal thermal shutdown protection * high psrr * recommended 1 f output capacitor only for stability * with ttl logic controlled shutdown input ? ordering information ordering number package packing lead free halogen free lr1185l-xx-ae5-r lr1185g-xx-ae5-r sot-23-5 tape reel note: xx: output voltage, refer to marki ng information. lr1185l-xx-ae5-r (1)packing type (2)package type (3)output voltage code (1) r: tape reel (2) ae5: sot-23-5 (3) xx: refer to marking information (4) l: lead free, g: halogen free (4)lead free
lr1185 preliminary cmos ic unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r502-a43.a ? marking information package voltage code marking sot-23-5 4b: 4.15v ? pin configuration ? pin description pin no. pin name description 1 v in unregulated supply input. 2 gnd ground terminal. 3 shdn shutdown control input. 4 bypass reference bypass input. connecting a 470pf to this input further reduces output noise. 5 v out regulated voltage output. ? block diagram por otp current limit mos driver bypass shdn r v ref v in v out gnd + -
lr1185 preliminary cmos ic unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r502-a43.a ? absolute maximum rating (t a =25c, unless otherwise specified.) parameter symbol ratings unit supply input voltage v in 6 v output voltage v out -0.3~v in +0.3 v power dissipation (t a =25c) p d 0.38 w junction temperature t j 150 c storage temperature t stg -65~+150 c note: a bsolute maximum ratings are those values beyond which the device could be permanently damaged. a bsolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? thermal data parameter symbol ratings unit junction to ambient ja 256 c/w ? operating conditions parameter symbol ratings unit supply input voltage v in 2.7~5.5 v junction temperature t j -40~+125 c ambient temperature t a -40~+85 c ? electrical characteristics (v in =v out +0.5v, v en =v in , c in =c out =1 f (ceramic), t a =25c, unless otherwise specified.) parameter symbol test conditions min typ max unit input voltage v in 2.7 5.5 v output voltage accuracy ? v out i out =10ma -2 0 +2 % line regulation out in out v v ? v ? v in =(v out +0.5v)~5.5v, i out =1ma 0.01 0.2 %/v load regulation (note 1) out out v v ? 1ma lr1185 preliminary cmos ic unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r502-a43.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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