unisonic technologies co., ltd us94061 preliminary cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2009 unisonic technologies co., ltd qw-r502-383.a high side power switches ? description the utc us94061 are high-side load switches incorporating a low on-resistance p-channel mosfet which provides customers over 2a continuous current. the utc us94061 is characterized by a fast turn on function. the utc us94061 keeps in a floating state when an active pull-down signals is on the enable input until a high level signal applies on the en pin. built-in level shift circuitry allows low voltage logic signals to switch to higher supply voltages, on the c ontrary, high level logic signals can control low level voltages. the utc us94061 ?s operating voltage vari es from 1.8v ~ 5.5v which makes these devices suitable for 1-cell lithium ion and 2- to 3-cell nimh/nicad/alkaline powered systems as well as all 5v applications. the 2a low operati ng current and low shutdown current(less than1a) make the battery life longer. the utc us94061 is generally suitable for applications, such as load switch in portable devices: cellular phones, pdas, mp3 players, digital cameras, portable instrumentat ion, battery swit ch-over circuits and level translators. ? features * operating voltage ra nge:1.8v ~ 5.5v * providing 2a continuous operating current * p-channel mosfet?s r on : 175m ? typical * built-in level shift for control logic * quiescent current is as low as 2a * micro-power shutdown less than 1a * built-in level shift circuitry: controlled 1s turn-on rise-time fast 60ns turn-off fall time * built-in fast-off load discharge circuit sot-26 4 5 3 2 1 6 ? ordering information ordering number package packing US94061G-AG6-R sot-26 tape reel
us94061 preliminary cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw ver.a ? marking ? pin configuration 6 5 4 1 2 3 v in gnd gnd nc v out en ? pin description pin no. pin name description 1 v out drain of p-channel mosfet. 2, 5 gnd ground connections. (should bot h be connection to electrical ground). 3 en enable (input): active-high cmos compatible control input. do not leave floating.. 4 v in source of p-channel mosfet. 6 nc no connect
us94061 preliminary cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw ver.a ? block diagram 4 3 1 en v in level shift load discharge v out
us94061 preliminary cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw ver.a ? absolute maximum rating parameter symbol ratings unit input voltage v in +6 v enable voltage v en +6 v t a = 25c 2 continuous drain current (note 3) t a = 85c i d 1.4 a pulsed drain current (note 5) i dp 6 a continuous diode current (note 7) i s -50 ma power dissipation (note 3)( t a = 85c) p d 270 mw operating ratings (note 2) input voltage range v in 1.8~5.5 v junction temperature t j +150 c storage temperature (note 4) t stg -55~+150 c note: 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 (note 3) ja 240 c/w ? electrical characteristics t a = 25c, unless otherwise specified. parameter symbol test conditions min typ max unit static en threshold voltage v thd(en)) v in = 1.8v ~ 4.5v, i d = -250a 0.5 1.2 v en input current (quiescent current) i q(en) v in = v en = 5.5v 2 4 a off state leakage current i leak v en = open or 0v, v in = +5.5v 1 a v in = 4.5v, i d = -100 ma, v en = 1.5v 175 200 v in = 3.6v, i d = -100 ma, v en = 1.5v 185 215 v in = 2.5v, i d = -100 ma, v en = 1.5v 205 245 p-channel drain-source on-resistance r ds(on ) v in = 1.8v, i d = -100 ma, v en = 1.5v 270 325 m ? turn-off impedance r shdn v in = 3.6v, v en = 0v or open 200 300 ? dynamic (note 6) turn-on delay time t d(on) v in = 3.6v, i d = -100ma, v en = 1.5v 850 1500 ns turn-on rise time t r v in = 3.6v, i d = -100ma, v en = 1.5v 0.5 1 5 s turn-off delay time t d(off) v in = 3.6v, i d = -100ma, v en = 1.5v 100 150 ns turn-off fall time t f v in = 3.6v, i d = -100ma, v en = 1.5v 60 100 ns note: 1. t a = 25c unless otherwise noted. absolute maximum ratings indicate limits beyond which damage to the component may occur. electrical specifications do not apply when o perating the device outside of its operating ratings. the maximum allowable power diss ipation is a function of the maximum junction temperature, t j(max) , the junction-to-ambient thermal resistance, ja , and the ambient temperature, t a . 2. this device is not guaranteed to oper ate beyond its specified operating rating. 3. mounted on 1 square-inch pad of 2 oz. copper. 4. ic devices are inherently esd sens itive. handling prec autions required. 5. pulse width < 300s with <2% duty cycle. 6. dynamic specifications are guaranteed by design. 7. body diode current conduction is not recommended.
us94061 preliminary cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw ver.a ? typical application circuit load switch application with capacitive load discharge 1 v out 2 gnd 3 en 6nc 5 gnd 4 v in load +
us94061 preliminary cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw ver.a ? typical characteristics i out v out enable i out v out enable i out v out enable i out v out enable 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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