unisonic technologies co., ltd uz2085 linear integrated circuit www.unisonic.com.tw 1 of 6 copyright ? 2012 unisonic technologies co., ltd qw-r102-043.f 3a adjustable/fixed low dropout linear regulator ? description the utc uz2085-xx series are low dropout three-terminal regulators with 3a output current capability. these devices have been optimized for low voltage applications 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 * load regulation: 0.05% typical * 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) to-252 1 ? ordering information ordering number package pin assignment packing lead free halogen free 1 2 3 uz2085l-xx-tn3-r uz2085g-xx-tn3-r to-252 a/g o i tape reel uz2085l-xx-tn3-t uz2085g-xx-tn3-t to-252 a/g o i tube 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
uz2085 linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r102-043.f ? marking information package voltage code marking to-252 50:5.0v ad:adj ? block diagram
uz2085 linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r102-043.f ? 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 uz2085-adj (adjustable) parameter symbol test conditions min. typ. max. unit reference voltage v ref 1.5v (v in - v out ) 8.25v 10ma i out 3a 1.225 1.25 1.275 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 75 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 for uz2085-xx (fixed voltage) parameter symbol test conditions min. typ. max. unit output voltage uz1085-50 v out 6.5v v in 12v, 10ma i out 3a 4.9 5.0 5.1 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 minimum load current i o ( min ) (v out +1.5v) v in 12v 1 ma quiescent current i q v in =12v 0.35 0.5 ma ripple rejection rr f=120hz, tantalum,(v in -v out )=3v,i out =3a 75 db thermal regulation t a =25c,30ms pulse 0.004 0.02 %/w temperature stability v out t a =125c, 1000hr 0.5 % long-term stability v out 0.03 1.0 % output noise(% of v out ) e n t a =25c,10hz f 10khz 0.003 % thermal shutdown 150 c
uz2085 linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r102-043.f ? typical application circuit the utc uz2085 also supports mlcc.
uz2085 linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r102-043.f ? typical characteristics minmum load current (ma) adjust pin current (a) 0 short-circuit current vs. v 0 v 1 23 4 5 6 7 8 1 2 3 4 5 6 7 30 20 90 10 100 10 1k 10k 80 70 60 50 40 0 100k frequency (hz) ripple rejection vs. frequency t=25 p o w e r ( w ) d r o p o u t v o l t a g e ( v )
uz2085 linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r102-043.f ? typical characteristics(cont.) 0 output voltage vs. output current o u t p u t v o l t a g e ( v ) 01 2 3 4 5678 1 2 3 4 5 output current (a) 125 -40 25 4 short-circuit current vs. temperature s h o r t - c i r c u i t c u r r e n t ( a ) -50 -25 25 50 125 junction temperature ( ) 5 6 7 8 0 75 100 utc uz2085-adj v out =3.3v 1.250 1.248 1.246 1.244 1.242 1.240 -25 0 25 50 75 100 125 junction temperature ( ) reference voltage vs. temperature r e f e r e n c e v o l t a g e ( v ) 1.252 1.254 5.10 5.05 5.00 4.95 4.90 4.85 -25 0 25 50 75 100 125 junction temperature ( ) output voltage vs. temperature o u t p u t v o l t a g e ( v ) utc uz2085-5.0 o u t p u t v o l t a g e d e v i a t i o n ( % )
uz2085 linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r102-043.f 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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