unisonic technologies co., ltd uss4450 npn silicon transistor www.unisonic.com.tw 1 of 4 copyright ? 2010 unisonic technologies co., ltd qw-r209-026.a 50v, 5a npn low v ce(sat) transistor ? description the utc uss4450 is a npn transistor with low v cesat. it has high collector current i c , i cm performance. this device can be used in power management applications, such as dc/dc converters, supply line switching, battery c harger and linear voltage regulation (ldo) and peripheral drivers, such as driver in low supply voltage applications and inductive load driver. ? features * less heat dissipation due to high efficiency * low collector-emitter saturation voltage * high collector current capability * high collector current gain under high collector current condition ? ordering information ordering number pin assignment lead free halogen free package 1 2 3 packing USS4450L-TN3-R uss4450g-tn3-r to-252 b c e tape reel
uss4450 npn silicon transistor unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r209-026.a ? absolute maximum ratings (ta=25c, unless otherwise specified) parameter symbol ratings unit collector-base voltage v cbo 60 v collector-emitter voltage v ceo 50 v emitter-base voltage v ebo 6 v dc i c 3 a collector current peak i cm 5 a peak base current i bm 1 a power dissipation (t c =25c) (note 2) p d 1.4 w junction temperature t j 150 c operating temperature t opr +150 c storage temperature t stg -65 ~ +150 c notes: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. device mounted on a printed-circuit board; single sided copper; tinplated; mounting pad for collector 6 cm 2 ? thermal characteristics parameter symbol ratings unit junction to ambient (note) ja 62.5 c/w notes device mounted on a printed-circuit board; single sided copper; tinplated; mounting pad for collector 6 cm 2 . for other mounting conditions see ?thermal consideratio ns for to-252 in the general part of associated handbook?. ? electrical characteristics t a = 25 c unless otherwise specified. parameter symbol test conditions min typ max unit v cb = 50 v, i e =0 100 na collector-base cut-off current i cbo v cb = 50 v, i e = 0, t j = 150 c 50 a emitter-base cut-off current i ebo v eb =5v, i c =0 100 na v ce =2v, i c = 500 ma 200 v ce =2v, i c = 1 a, (note 1) 200 dc current gain h fe v ce =2v, i c = 2 a, (note 1) 100 i c = 500 ma, i b =50ma 90 mv i c = 1 a, i b =50ma 170 mv collector-emitter satu ration voltage v cesat i c = 2 a, i b = 200 ma, (note 1) 290 mv equivalent on-resistance r cesat i c = 2 a, i b = 200 ma, (note 1) 110 145 m ? base-emitter satura tion voltage v besat i c = 2 a, i b = 200 ma, (note 1) 1.2 v base-emitter turn -on voltage v beon v ce =2v, i c = 1 a, (note 1) 1.1 v transition frequency f t i c = 100 ma, v ce = 5 v, f = 100 mhz 100 mhz collector capacitance c c v cb = 10 v, i e =ie = 0, f = 1 mhz 30 pf note 1. pulse test: t p 300 s, 0.02. ? typical characteristics
uss4450 npn silicon transistor unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r209-026.a collector current,i c (ma) collector-emitter saturation voltage, v ce(sat) (mv) collector current,i c ( a) collector current,i c ( a)
uss4450 npn silicon transistor unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r209-026.a 0246 10 2 0 4 6 8 12 14 16 base current vs. emitter-base voltage 81012 18 emitter-base voltage,v ebo (v) 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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