unisonic technologies co., ltd us204 preliminary cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-601.a 100m , 1/1.5a high-side power switches with flag ? description the utc us204 series are 100m ? high-side power switches. there are internal duel low voltage n-channel mosfets which whish is ideal all usb applications. these mosfets is driven by a charge pump circuitry inside, t hese switches on resistance are as low as 100m ? which and meet the drop voltage for usb applications. the flag pins output an open-drain fault flag to next controller. there?re lots internal special ways for protecting the chip?s operation. there are also built-in protection circnits to ensure the chips function normally. 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 temperature 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, 2.1v typ.) can make sure the chip is in the off state. because of the requirement of usb power, the fault current should be ensured to be less than 1.5a for utc us204ah/al and 1.0a for utc us204ch/cl . ? features * 100m ? (typ) n-channel mosfet * supply current: ? switch on : 60 a (typ) ? switch off : 1 a (typ) * load current 1.5a for us204ah/al and 1.0a for us204ch/cl * input voltage from 2v ~ 5.5v * in off-state: output volt age can be higher than input sop-8 ? rdering information ordering number lead free halogen free package packing US204XXL-S08-R us204xxg-s08-r sop-8 tape reel
us204 preliminary cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-601.a ? pin configuration ? pin description pin no pin name description 1 gnd ground 2 v in power input voltage 3 ctl1 chip enable turns on power switch in v out1 . 4 ctl2 chip enable turns on power switch in v out2 . 5 flg2 over current or over temperature status output, open-drain output, active low, in v out2 . 6 v out2 power-switch output, in v out2 . 7 v out1 power-switch output, in v out1 . 8 flg1 over current or over temperature status output,, open-drain output, active low, in v out1 .
us204 preliminary cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-601.a ? block diagram
us204 preliminary cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-601.a ? absolute maximum rating (ta=25 , unless otherwise specified) parameter symbol ratings unit 6.0 v supply voltage v cc +2 ~ +5.5 (note 2) v -0.3~ +6.0 v ctl v ctl 0 ~ +5.5 (note 2) v input/output pins flg flg v 6.0 v power dissipation (ta=25 ) p d 0.3 w 150 junction temperature t j -20 ~ +100 (note 2) storage temperature t stg -65 ~ +150 notes: 1. 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. 2. the device is not guaranteed to functi on when it?s beyond its operating conditions. ? electrical characteristics parameter symbol test conditions min typ max unit enable input low v il v in =2v~5.5v, switch off 0.8 v ctl threshold high v ih v in =2v~5.5v, switch on 2.0 v ctl input current i i(ctl) v ctl =0v~5.5v 0.01 a under voltage lock under-voltage lockout v uvlo v in increasing 2.1 v under-voltage hysteresis ? v uvlo v in decreasing 0.1 v supply current i sw(on) switch on, v out =open 65 90 a supply current i sw(off) switch off, v out =open 0.1 1 a output leakage current i o(leak) v ctl =0v, r load =0 ? 0.5 1 a current limit us204ax 1.5 2.0 2.8 a current limit us204cx i limit v outx =4v 1.1 1.5 2.1 a us204ax 1.4 a short circuit fold-back current us204cx i sc ( fb ) v out =0v, measured prior to thermal shutdown 1.0 a power switch us204ax i out =1.3a, v in =5v,each channel 100 110 m ? switch on resistance us204cx r ds(on) i out = 1a, v in =5v,each channel 100 110 m ? output turn-on rise time t on ( rise ) 10% ~ 90% of v out rising 400 s over current flag 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 5 12 15 ms thermal shutdown thermal shutdown protection t sd 130 thermal shutdown hysteresis ? t sd 20
us204 preliminary cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-601.a ? test circuit v in ctl gnd v out flg utc us204 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 in ctl gnd v out flg utc us204 c i r fg v flg c o r l i l v out s2 a i out s3 current limit vs. input voltage, inrush current response, current limit transient response
us204 preliminary cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-601.a ? typical application circuit ctl2 v out2 flg2 ctl1 v in gnd flg1 v out1 utc us204 v in on/off usb controller overcurrent overcurrent gnd on gnd in out ldo gnd v bus d+ d- gnd d- d+ v bus ferrite bead 4.50v 5.25v upstream v bus 100ma max gnd v bus d+ d- 1 f 33 f + + v cc 5.0v 10k 10k usb port1 usb port2 data (two pair) to usb controller data 1 f 0.1 f 0.01 f 33 f 0.01 f 33 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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