unisonic technologies co., ltd US201/US201a preliminary cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2009 unisonic technologies co., ltd qw-r502-302.b 80m ? , 500ma/1.1a high-side power switches with flag ? description the utc US201/a series are 80m ? , 500ma for US201 (1.1a fo r US201a ) high-side power switches. there?s internal single lo w voltage n-channel mosfet which makes it an ideal for all usb applications. this mosfet shoul d be driven by a charge pump circuitry inside. its switch on resistance is as low as 80m ? which we know specially meets the drop voltage for usb applications. the flag pin can output an open-drain fault flag to next controller. there?re lots internal special ways for protecting the chip?s operation. when in hot-plug events, there?s large current which can create the upstream voltage droop to match the usb?s voltage droop requirements and soft-start for isolating the power source. as soon as the die temper ature is higher than 130 , the internal shutdown circuit will work. only when there?s a normal input voltage in the v in pin, the uvlo (under-voltage lockout, 1.7v typ.) can make sure the chip is till in the off state. because of the requirement of usb power the fault current should be ensured less than 800ma (utc US201 , single port) and 1.5a (utc US201a , dual ports). ? features * 80m ? (typ) n-channel mosfet * supply current: ? switch on :25 a(typ) ? switch off :1 a (typ) * load current 500ma for US201 and 1.1a for US201a * input voltage from 2v to 5.5v * in off-state: output volt age can be higher than input lead-free: US201l/US201al halogen-free:US201g/US201ag ? ordering information ordering number normal lead free halogen free package packing US201-af5-r US201l-af5-r US201g-af5-r sot-25 tape reel US201a-af5-r US201al-af5-r US201ag-af5-r sot-25 tape reel
unisonic technologies co., ltd US201/US201a preliminary cmos ic www.unisonic.com.tw 2 of 6 copyright ? 2009 unisonic technologies co., ltd qw-r502-302.b ? marking 321 5 4 usb current code 1: 500ma a: 1.1a l: lead free l : halogen free ? pin configuration ? pin description pin no pin name description 1 ctl high active 2 gnd ground 3 flg open-drain fault flag output 4 v in power input voltage 5 v out output voltage
US201/US201a preliminary cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-302.b ? block diagram
US201/US201a preliminary cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-302.b ? absolute maximum rating parameter symbol ratings unit 6.5 v supply voltage v cc +2~ +5.5 (note 3) v -0.3~ +6.5 v ctl v ctl 0~ +5.5 (note 3) v input/output pins flg flg v 6.5 v power dissipation (ta=25 ) p d 0.25 w 150 junction temperature t j -20~ +100 (note 3) storage temperature t stg -65~ +150 note: 1. 2. 3. absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. stresses listed as the "absolute maximum ratings " will cause permanent damage to the device. the device is not guaranteed to function w hen it?s beyond its operating conditions. ? thermal data parameter symbol ratings unit junction-to-ambient ja 250 /w ? electrical characteristics parameter symbol test conditions min typ max unit logic-low voltage v il v in =2v~5.5v, switch off 0.8 v ctl threshold logic-high voltage v ih v in =2v~5.5v, switch on 2.0 v under-voltage lockout v uvlo v in increasing 1.3 1.7 v under-voltage hysteresis ? v uvlo v in decreasing 0.1 v i sw(on) switch on, v out =open 25 45 a supply current i sw(off) switch off, v out =open 0.1 1 a ctl input current i i(ctl) v ctl =0v~5.5v 0.01 a output leakage current i o(leak) v ctl =0v, r load =0 ? 0.5 10 a US201 0.5 0.8 1.1 a current limit i limit r load =1 ? US201a 1.1 1.5 2.0 a US201 0.8 a short circuit fold-back current i sc ( fb ) v out =0v, measured prior to thermal shutdown US201a 1.0 a i out = 500ma US201 80 100 m ? switch on resistance r ds(on) i out =1.1a US201a 80 100 m ? flag off current (off) flg i flg v=5v 0.01 1 a flag output resistance flg r i sink =1ma 20 400 ? flag delay time t d from fault condition to flg assertion 2 10 15 ms output turn-on rise time t on ( rise ) 10% ~ 90% of v out rising 400 s thermal shutdown protection t sd 130 thermal shutdown hysteresis ? t sd 20
US201/US201a preliminary cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-302.b ? test circuits v in ctl gnd v out flg utc US201/a chip enable a v in c i r fg v flg s1 i out c o r l i l v out turn-on & off response, flag response v in v ctl v in ctl gnd v out flg utc US201/a c i r fg v flg c o r l i l v out uvlo at rising & falling
US201/US201a preliminary cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-302.b ? typical application circuit supply voltage 5v ferrite beades 1f 10f 150f v bus d+ d- gnd data v in ctl gnd v out flg utc US201/a chip enable r fg pull-up resistor (10k ~ 100k) over - current flag transient filtering usb controller 0.1f 10k note. a low-esr 150 f aluminum electrolytic or tantalum between v out and gnd is strongly recommended to meet the 330mv maximum droop requirement in the hub v bus . 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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