smartswitc h ? aat4625 usb single-channel power switch preliminary information 4625.2002.1.0.93 1 general description the aat4625 smartswitch? is part of analogictech's application specific power mosfet? (aspm?) product family. it is a 1.0a current limited p-channel, mosfet power switch designed for high-side load-switching applications. this switch operates with inputs ranging from 2.7v to 5.5v, making it ideal for both 3v and 5v systems. an integrated current-limiting circuit protects the input supply against large changes in load current which may cause the supply to fall out of regulation. the aat4625 is also protected from thermal over- load which limits power d issipation and junction temperatures. the current limit threshold is factory programmed at 1.5a, with a maximum of 2.0a. the quiescent supply current is typically a low 16a. in shutdown mode, the supply current decreases to less than 1a. the aat4625 is available in 8 pin sop or tssop and is specified over a -40 to 85c temperature range. the aat4600 series is a family of adjustable and fixed smartswitch? products with a range of cur- rent handling capabilities. s ingle versions with adjustable current limit (aat4601) or fixed current limit (aat4625) as well as dual versions with fixed current limit (aat4626) are available. features ? compliant with usb 1.1 and 2.0 specifications ? 2 .7v to 5.5v input voltage range ? 1 .0a m inimum continuous current ? 2 .0a maximum current limit ? 60m ? typical r ds(on) ? low quiescent current ? typically 16a ? 1a max with switch off ? thermal shutdown ? fault flag with 10ms blanking ? undervoltage lockout ? temp range -40 to 85c ? ul approvedfile no. e217765 ? 8 pin sop or tssop package applications ? usb ports and peripherals ? notebook computers ? hot swap supplies ? general purpose power switching ul recognized component typical application 120 f gnd gnd output out out in en (en)en (en) 0.1 f v cc 5.0v 100k flg 7 2 1 3 8 6 aat4625
pin descriptions pin configuration sop-8 tssop-8 (top view) (top view) 1 2 in out out nc en (en) flg gnd nc 1 2 3 4 8 7 6 5 1 2 en (en) flg gnd nc out in out nc pin # symbol function 1 en (en) enable input: logic-compatible enable input. high input > 2.1v typical. low input < 1.9v typical. active high or active low option available; see ordering information for details. 2 flg fault flag output: active-low, open-drain output. indicates over current, uvlo and thermal shutdown. 3 gnd ground connection 4,5 nc not internally connected. 6,8 out switch output: these pins are the p-channel mosfet drain connection. 7 in supply input: this pin is the p-channel mosfet source connection. also supplies the ic's internal circuitry. aat4625 usb single-channel power switch 2 4625.2002.1.0.93
absolute maximum ratings (t a =25c unless otherwise noted) note: stresses above those listed in absolute maximum ratings may cause permanent damage to the device. functional operation a t con- ditions other than the operating conditions specified is not implied. only one absolute maximum rating should be applied at an y one time. thermal information note 1: mounted on an fr4 printed circuit board. electrical characteristics (v in = 5v, t a = -40 to 85c unless otherwise noted. typical values are at t a =25c; bold values designate full temperature range) symbol description conditions min typ max units v in operation voltage 2.7 5.5 v i q quiescent current v in =5v, en=active 16 30 a i q(off) off supply current v in =5.5v, en (en)=inactive 1 a v en-thrsh enable input threshold low-to-high transition 2.4 v high-to-low transition 0.8 v i en enable input current v en = 0v to 5.5v 0.01 1 a c en enable input capacitance 1 pf r ds(on) on-resistance v in =5v, t a = 25c 60 100 m ? v in =3.0v, t a = 25c 70 115 m ? t on output turn-on delay v in =5v, r l =10 ? 0.25 ms t on-rise output turn-on rise time v in =5v, r l =10 ? 0.2 ms t off output turn-off delay v in =5v, r l =10 ? 5 20 s t off-fall output turn-off fall time v in =5v, r l =10 ? 20 s i sd(off) output leakage current en=inactive, v in =5.5v, v out =0v 0.03 15 a i limit current limit threshold ramped load applied to enable 1.0 1.5 2.0 a output, v out < 4.0v otmp over temperature shut down t j increasing 125 c t j decreasing 115 c r flg error flag output resistance v in =5v, i l = 1ma 30 ? i sink error flag off current v flg = 5.5v 0.05 1 a v uvlo under voltage lockout v in = increasing, 1% hysteresis 2.0 2.3 2.7 v t blank fault blanking 10 ms symbol description value units ja maximum thermal resistance (sop-8) 1 100 c/w p d maximum power dissipation (sop-8) 1 1.25 w symbol description value units v in in to gnd -0.3 to 6 v v flg flg to gnd -0.3 to 6 v i flg flg current 50 ma v out out to gnd -0.3 to v in +0.3 v i out output current (internally limited) 2.0 a v en en to gnd -0.3 to 6 v t s storage temperature 150 c t lead maximum soldering temperature (at leads) 300 c aat4625 usb single-channel power switch 4625.2002.1.0.93 3
typical characteristics (unless otherwise noted, v in = 5v, t a = 25c) turn-on/off response with 10 ohm 1 fload en (5v/div) fault vout (2v/ off-switch current vs. temperature 0.0000 0.0001 0.0010 0.0100 0.1000 1.0000 -40 -20 0 20 40 60 80 100 120 off-switch current ( a) off-supply current vs. temperature 0.0010 0.0100 0.1000 1.0000 -40 -20 0 20 40 60 80 100 12 0 temperature ( c) off-supply current ( a) current limit 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 012345 o output (a) utput (v) quiescent current 0 2 4 6 8 10 12 14 16 18 20 0123456 input (v) input ( a) quiescent current vs. temperature 0 5 10 15 20 25 30 -40 -20 0 20 40 60 80 100 120 temp q u i escen t c urren t ( a) erature ( c) aat4625 usb single-channel power switch 4 4625.2002.1.0.93
(unless otherwise noted, v in = 5v, t a = 25c) r ds(on) vs. temperature 40.0 45.0 50.0 55.0 60.0 65.0 70.0 75.0 80.0 -40 -20 0 20 40 60 80 100 120 tem perature ( c) v cc =3v v cc =5v short circuit through 0.6 ohm 0 2 4 6 8 -1012345 ti input and output (v) output (a) me ( s) -3 0 3 6 9 input voltage output current output voltage short circuit through 0.3 ohm 0 2 4 6 8 -1012345 tim input and output (v) output (a) e( s) -4 0 4 8 12 input voltage output current output voltage thermal shutdown response 50ms/ div en (5v/div) fault (5v/div) vout (1v/div) iin (500ma/div) start into 1 ohm load 1ms/div en (5v/div) fa u lt (5 v /d iv) vout (1v/div) iin (500ma/div) aat4625 usb single-channel power switch 4625.2002.1.0.93 5
functional block diagram 1.2v reference current limit over-temp protection under- voltage lockout in en (en) gnd flg out aat4625 usb single-channel power switch 6 4625.2002.1.0.93
ordering information package information sop-8 1 2 e b e h d a1 a a2 7(4x) c l y q package enable marking part number bulk tape and reel sop8 en (active-high) aat4625ias-1-b1 aat4625ias-1-t1 sop8 en (active-low) aat4625ias-b1 aat4625ias-t1 tssop8 en (active-high) AAT4625IHS-1-B1 aat4625ihs-1-t1 tssop8 en (active-low) aat4625ihs-b1 aat4625ihs-t1 aat4625 usb single-channel power switch 4625.2002.1.0.93 7 dim millimeters inches min max min max a 1.35 1.75 0.053 0.069 a1 0.10 0.25 0.004 0.010 a2 1.45 0.057 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.007 0.010 d 4.80 5.00 0.189 0.197 e3.80 4.00 0.150 0.157 e 1.27 0.050 h 5.80 6.20 0.228 0.244 l 0.40 1.27 0.016 0.050 y 0.00 0.10 0.000 0.004 10 8 0 8 note: 1. package body sizes exclude mold flash protrusions or gate burrs. 2. tolerance 0.1000mm (4mil) unless otherwise specified 3. coplanarity: 0.1000mm 4. dimension l is measured in gage plane. 5. controlling dimension is millimeter; converted inch dimensions are not necessarily exact.
tssop-8 a1 b e e 1 2 a a2 e1 detail a r l1 l 0.20 d r1 2 e 1 detail a aat4625 usb single-channel power switch 8 4625.2002.1.0.93 advanced analogic technologies, inc. 1250 oakmead parkway, suite 310, sunnyvale, ca 94086 phone (408) 524-9684 fax (408) 524-9689 dim millimeters inches min max min max a 1.05 1.20 0.041 0.047 a1 0.05 0.15 0.002 0.006 a2 - 1.05 - 0.041 b 0.25 0.30 0.010 0.012 c 0.127 0.005 d-8 2.90 3.10 0.114 0.122 d-28 9.60 9.80 0.378 0.386 e4.30 4.50 0.170 0.177 e1 6.20 6.60 0.244 0.260 e 0.65 bsc 0.025 bsc l 0.50 0.70 0.20 0.028 l1 1.0 0.039 r 0.09 - 0.004 - r1 0.09 - 0.004 - 10 8 0 8 2 12
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