unisonic technologies co., ltd UZ2085A preliminary linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2013 unisonic technologies co., ltd qw-r101-045. a 3a adjustable/fixed low dropout linear regulator ? description the utc UZ2085A series are low dropout three-terminal regulators with 3a output current capability. these devices have been optimized for low voltage applicati ons including vtt bus termination in which transient response and minimum input voltage are critical. current limit is trimmed to ensu re specified output current and controlled short-circuit current. on-c hip thermal limitation provides protection against any combination of overload and ambient temperature that would create ex cessive junction temperature. ? features * fast transient response * low dropout voltage at up to 3a * trimmed current limit * on-chip thermal limiting * ultra low current consumption (0.35ma typ.) * ultra low adjustment current (7 a typ.) * ultra low minimum load (0.3ma typ.) * stable with low esr ceramic output capacitor (mlcc) ? rdering information ordering number package pin assignment packing lead free halogen free 1 2 3 UZ2085Al-xx-tn3-t UZ2085Ag-xx-tn3-t to-252 a/g o i tube UZ2085Al-xx-tn3-r UZ2085Ag-xx-tn3-r to-252 a/g o i tape reel note: 1. xx: output voltage, refer to marki ng information. 2. a: adj (for adjustable regul ator), g: gnd (for fixed regulator), o: v out , i: v in
UZ2085A preliminary linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r101-045. a ? marking information package voltage code marking to-252 a d : a d j ? block diagram
UZ2085A preliminary linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r101-045. a ? absolute maximum ratings parameter symbol ratings unit input voltage v in 18 v power dissipation p d internally limited w junction temperature t j +150 c operating temperature t opr -20 ~ +85 c storage temperature t stg -40 ~ +150 c note:1 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. ? thermal data parameter symbol ratings unit junction to ambient ja 118 c/w junction to case jc 12 c/w ? electrical characteristics (t a =25c, c out =22 f, unless otherwise specified.) for UZ2085A-adj (adjustable voltage) parameter symbol test conditions min. typ. max. unit reference voltage v ref 1.5v (v in - v out ) 8.25v, 10ma i out 3a 0.98 1.0 1.02 v line regulation ? v out (v out +1.5v) v in 12v, i out =10ma 0.005 0.2 % load regulation ? v out (v in -v out )=3v, 10ma i out 3a 0.05 0.5 % dropout voltage v d ? v ref %=1%, l out =3a 1.2 1.40 v current limit i limit (v in -v out )=2v 3.1 5.8 a adjust pin current i adj 7 10 a adjust pin current change ? i adj (v out +1.5v) v in 12v, 10ma i out 3a 0.3 2 a minimum load current i o ( min ) (v out +1.5v) v in 12v 0.3 1 ma ripple rejection rr f=120hz,tantalum,(v in -v out )=3v i out =3a 45 db thermal regulation t a =25c,30ms pulse 0.004 0.02 %/w temperature stability ? v out 0.5 % long-term stability ? v out t a =125c, 1000hr 0.03 1.0 % output noise(% of v out ) e n t a =25c,10hz f 10khz 0.003 % thermal shutdown 150 c
UZ2085A preliminary linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r101-045. a ? typical application circuit v in v out adj 22 f v in =12v + r1 0.93k r2 7.4k 22 f + 9v at 3a v out =v ref (1+r2/r1)+i adj r2 UZ2085A-adj the utc UZ2085A also supports mlcc. v in v out adj 22 f v in =12v r1 0.93k r2 7.4k 22 f 9v at 3a v out =v ref (1+r2/r1)+i adj* r2 UZ2085A-adj
UZ2085A preliminary linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r101-045. a ? typical characteristics p o w e r ( w ) 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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