unisonic technologies co., ltd uz1085 linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2009 unisonic technologies co., ltd qw-r102-013,g 3a adjustable/fixed low dropout linear regulator ? description the utc uz1085-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, where transient response and minimum input voltage are critical. current limit is trimmed to ensu re specified output current and controlled short-circuit current. on-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create ex cessive junction temperatures. ? features *fast transient response *low dropout voltage at up to 3a *load regulation:0.05% typical *trimmed current limit *on-chip thermal limiting lead-free: uz1085l-xx halogen-free: uz1085g-xx ? ordering information ordering number pin assignment normal lead free halogen free package 1 2 3 packing uz1085-xx-ta3 - t uz1085l-xx-ta3 - t uz1085g-xx-ta3 - t to-220 a/g o i tube uz1085-xx-tn3 - r uz1085l-xx-tn3 - r uz1085g-xx-tn3 - r to-252 a/g o i tape reel uz1085-xx-tq2 - r uz1085l-xx-tq2 - r uz1085g-xx-tq2 - r to-263 a/g o i tape reel uz1085-xx-tq2 - t uz1085l-xx-tq2 - t uz1085g-xx-tq2 - t to-263 a/g o i tube uz1085-xx-tq3 - r uz1085l-xx-tq3 - r uz1085g-xx-tq3 - r to-263-3 a/g o i tape reel uz1085-xx-tq3 - t uz1085l-xx-tq3 - t uz1085g-xx-tq3 - t to-263-3 a/g o i tube note: 1. xx: output voltage, refer to marki ng information. 2. a: adj (for adjustable regulato r), g: gnd (for fixed regulator), o: v out , i: v in
uz1085 linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r102-013,g ? marking information package voltage code marking to-220 to-252 to-263 to-263-3 15 :1.5v 18 :1.8v 25 :2.5v 33 :3.3v 50 :5.0v ad:adj 123 utc uz1085 xx voltage code date code l: lead free g: halogen free lot code
uz1085 linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r102-013,g ? absolute maximum ratings parameter symbol ratings unit input voltage v in 18 v (v in - v out ) i out see figure 1 junction temperature t j +125 c operating temperature t opr -40 ~ +85 c storage temperature t stg -40 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? thermal data parameter symbol ratings unit to-252 118 c/w to-220 62 c/w junction to ambient to-263 ja 62 c/w to-252 12 c/w to-220 4 c/w junction to case to-263 jc 4 c/w ? electrical characteristics (ta=25c, c out =22 f, unless otherwise specified.) for uz1085-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 1.30 1.40 v current limit i limit (v in -v out )=2v 3.1 4 a adjust pin current iadj 35 120 a adjust pin current change iadj 1.5v ( v in - v out ) 12v 10ma i out 3a 0.2 5 a minimum load current i o(min) 1.5v (v in -v out ) 12v 10 ma quiescent current i q v in =12v 4 13 ma ripple rejection rr f=120hz,tantalum,(v in ?v out )=3v i out =3a 60 72 db thermal regulation ta=25 c,30ms pulse 0.004 0.02 %/w temperature stability v out 0.5 % long-term stability v out ta=125c, 1000hr 0.03 1.0 % output noise(% of v out ) en ta=25c,10hz f 10khz 0.003 % thermal shutdown 150 c
uz1085 linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r102-013,g ? electrical characteristics for uz1085-xx (fixed voltage) parameter symbol test conditions min. typ. max. unit uz1085-15 3.0v v in 8.5v, 10ma i out 3a 1.470 1.5 1.530 v uz1085-18 3.3v v in 8.8v, 10ma i out 3a 1.764 1.8 1.830 v uz1085-25 4.0v v in 9.5v, 10ma i out 3a 2.450 2.5 2.550 v uz1085-33 4.8v v in 10.3v, 10ma i out 3a 3.234 3.3 3.366 v output voltage uz1085-50 v out 6.5v v in 12v, 10ma i out 3a 4.900 5.0 5.100 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 Q i out 3a 0.05 0.5 % dropout voltage v d v ref %=1%, l out =3a 1.30 1.40 v current limit i limit (v in -v out )=2v 3.1 4 a minimum load current i o(min) 1.5v (v in -v out ) 12v 10 ma quiescent current i q v in =12v 4 13 ma ripple rejection rr f=120hz, tantalum (v in -v out )=3v,i out =3a 60 72 db thermal regulation ta=25 c,30ms pulse 0.004 0.02 %/w temperature stability v out ta=125c, 1000hr 0.5 % long-term stability v out 0.03 1.0 % output noise(% of v out ) en ta=25c,10hz f 10khz 0.003 % thermal shutdown 150 c
uz1085 linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r102-013,g ? typical application circuit
uz1085 linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r102-013,g ? typical characteristics 1.4 1.3 1.5 0.5 0.5 0 2.5 1.2 1.1 2 1.5 1 1.0 0.9 0.8 0.7 0.6 3.0 output current (a) figure 2. dropout voltage vs.output current t=25c 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature (c) figure 3. load regulation vs. temperature i=3a 10 0 15 0 50 0 2 3 4 1 0 0 6 4 2 8 10 12 14 figure 1. absolute maximum sate operating area vin-vout (v) 1.260 1.255 1.250 1.245 1.240 1.235 1.230 1.225 1.220 1.215 1.210 -75 -50 -25 0 25 50 75 100 125 150 175 figure 4. reference voltage vs. temperature junction temperature (c) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature (c ) figure 5. output voltage vs.temperature v out set with 1% resistors v out =3.6v v out =3.3v uz1085-3.3 uz1085-adj 5 4 3 2 1 -75 -50 -25 0 25 50 75 100 125 150 175 figure 6. minimum load current vs.temperature 0 junction temperature (c )
uz1085 linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r102-013,g ? typical characteristics(cont.) 5.0 4.5 4.0 3.5 -75 -50 -25 0 25 50 75 100 125 150 175 figure 8. short-circuit current vs.temperature short-circuit current (a) 3.0 30 20 90 10 100 10 1k 10k 80 70 60 50 40 0 100k frequency (hz) figure 9. ripple rejection vs.frequency ripple rejections (db) (v in -v out ) 3v 0.5v v ripple 2v i out =3a 100 90 80 70 60 -75 -50 -25 0 25 50 75 100 125 150 175 junction temperature (c) figure 7. adjust pin current vs.temperature adjust pin current ( a) 0 50 40 30 20 10 uz1085-adj 10 0 15 0 50 0 10 15 20 5 0 70 60 50 80 90 100 110 p o w e r ( w ) figure 10. maximum power dissipation case temperature (c) 120 130 140 150 junction temperature (c) 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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