ap1201 single-channel power distribution switch this datasheet contains new product information. anachip corp. reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev. 0.4 feb 10, 2004 1/9 features - 100m typical on-resistance - 2.7v to 5.5v input voltage - adjustable current- limit 0.7a to 1.25a (ap1201a/c) - fixed current-limit (1.25a) for ap1201b - fault flag with internal delay circuit - 1 a typical off-state supply current - 65 a typical on-state supply current - output can be forced higher than input (off-state) - thermal shutdown - 2.4v typical under voltage lockout (uvlo) - slow turn-on (soft-start) and fast turn-off - enable active-high or active-low - sot23-5l, sot23-6l and sot89-5l packages applications - usb power switch - battery-charger circuits - hot plug-in power supplies general description the ap1201 series are integrated high-side power switch with enable, flag functions and adjustable current-limit 0.7a to 1.25a, optimized for self-powered and bus-powered universal serial bus (usb) applications. the ap1201 series support the following usb requirements: each switch channel supplies up to 700ma as required by usb downstream devices; the switch?s low on-resistance meets usb voltage drop requirements; fault current is limited to typically 900ma~1.25a; and a flag output is available to indicate fault conditions to the local usb controller. so ft start eliminates the momentary voltage drop on the upstream port that may occur when the sw itch is enabled in bus-powered applications. additional features include thermal shutdown to prevent catastrophic switch failure from high-current loads, under voltage lockout (uvlo) to ensure that the device remains off unless there is a valid input voltage present, and 3.3v and 5v logic compatible enable inputs. pin assignments 1 2 3 7 4 6 5 en set flg gnd out in sot23-6l ap1201c 1 2 3 7 4 5 en set gnd out in sot23-5l ap1201a 1 2 3 7 4 5 en flg gnd out in sot23-5l ap1201b 1 2 3 7 4 5 en set gnd out in sot89-5l ap1201a gnd 1 2 3 7 4 5 en flg gnd out in sot89-5l ap1201b gnd pin descriptions name descriptions en enable: logic-compatible enable input. (h: active high, l: active low). do not float. flg fault flag: active-low, open-drain output. indicates over current, uvlo, and thermal shutdown. gnd ground: supply return. in supply input: output mosfet drain. also supplies ic?s internal circuitry. connect to p ositive su pp l y . out switch output: output mosfet source. typically connect to switched side of load. set current limit set inpu t. a resistor pull high to set current-limit value (a, c type only).
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 feb 10, 2004 2/9 ordering information power switch enable w5 : sot23-5 w6 : sot23-6 y : sot89-5l packing blank: tube a : taping package l: active-low h: active-high current & flg a: adj i ,w/o flg b: 1.5a fix,w flg c:adj i,w flg ap12 01 x x x x x lead free blank : normal l : lead free package block diagram out in flg en power n-mosfet charge pump thermal shutdown driver current limit uvlo cs set absolute maximum ratings (note 1) symbol parameter rating unit v in supply voltage +7 v v flg fault flag voltage +7 v i max maximum continuous current 1.5 a v out output voltage +7 v v en control input ?0.3 to +15 v t s storage temperature -65 to +150 o c t lead lead temperature 260 o c v esd esd (hbm) rating, (note 2) 4 kv
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 jan 28, 2004 3/9 operating ratings (note 3) symbol parameter rating unit v in supply voltage +2.7 to +5.5 v t a ambient operating temperature -40 to +85 o c pd sot89-5, sot23-5, sot23-6 internal limited jc sot89-5 100 o c/w jc sot23-5, sot23-6 300 o c/w electrical characteristics (under operating conditions) v in =+5v;t a =25 o c; unless noted. symbol parameter conditions min. typ. max. unit switch off, out = open (note 4) 0.1 1 a i cc supply current switch on, out = open (note 4) 65 110 a low-to-high transition(note 4) 1.7 2.4 v v it enable input threshold high-to-low transition(note 4) 0.8 1.4 v i en enable input current v en =0v to 5.5v -1 0.01 1 a c en enable input capacitance 1 pf r ds(on) switch resistance v in =5v, i out =500ma 100 120 m t ond output turn-on delay r l =10 30 s t r output turn-on rise time r l =10 0.75 ms t offd output turnoff delay r l =10 1 20 s t f output turnoff fall time r l =10 0.15 s i leak output leakage current 10 a current-limit r load =1 ap1201b 1.0 1.25 1.8 a short-circuit current ap1201b -- 1.25 -- a i lim adj current limit typical value ap1201a/c 0.7 -- 1.25 a t j increasing 140 o c t ts over-temperature shutdown threshold t j decreasing 130 o c v in = 5v, i l = 10ma 10 25 r fo error flag output resistance v in = 3.3v, i l = 10ma 15 40 t d flg output delay time 1 2 5 ms i foh error flag off current v flag = 5v 0.01 1 a v in = increasing 2.5 v uvlo uvlo threshold v in = decreasing 2.3 v note 1. exceeding the absolute maximum rating may damage the device. note 2. devices are esd sensitive. handling precautions recommended. human body model, 1.5k in series with 100pf. note 3. the device is not guaranteed to function outside its operating rating. note 4. off is v en Q 0.8vand on is v en R 2.4v for the ap1201x-h. off is v en R 2.4v and on is v en Q 0.8v for the ap1201x-l. the enable input has approximately 200mv of hysteresis. see control threshold charts.
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 feb 10, 2004 4/9 typical application circuit power supply downstream usb ports usb control 3.3v 5v 0.1uf in flg en out gnd 0.1uf 33uf gnd vbus d- d+ ap1201c set test circuit gnd flg in set en ap1201 out c1 0.1uf v cc =+5v on off r1 10k
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 jan 28, 2004 5/9 function description e rror flag an open-drained output of an n-channel mosfet, the flg output is pulled low to signal the following fault conditions: input under-voltage, output current limit, and thermal shutdown. current limit the current limit is set externally. it protects the output mosfet switches from damage due to undesirable short circuit conditions or excess inrush current often encountered during hot plug-in. the low limit of the current limit threshold of the ap1201 allows a minimum current of 0.9a through the mosfet switches. a curr ent limit condition will signal the error flag. a resistor from set to vin sets the current-limit value. i lim(max) ~ 1.4x i lim(typ) i lim(min) ~ 0.8x i lim(typ) ap1201 rset current limit threshold (a) typical value r set ( ? ) (vout = 5v) (vout = 3.3v) 10k 0.71 0.69 20k 0.92 0.90 30k 1.01 1.00 40k 1.05 1.02 60k 1.10 1.08 80k 1.15 1.11 100k 1.19 1.16 200k 1.22 1.20 floating 1.25 1.23 thermal shutdown when the chip temperature exceeds 140oc for any reason, the thermal shutdown function enables and turns off mosfet?s switch and signals the error flag. a hysteresis of 10oc prevents the mosfets from turning back on until the chip temperature drops to below 130oc. supply filtering a 0.1f to 1f bypass capacitor from in to gnd, located near the device, is strongly recommended to control supply transients. without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. transient droop requirements usb supports dynamic attachment (hot plug-in) of peripherals. a current surge is caused by the input capacitance of downstream device. ferrite beads are recommended in series with all power and ground connector pins. ferrite beads reduce emi and limit the inrush current during hot-attachment by filtering high-frequency signals. short circuit transient bulk capacitance provides the short-term transient current needed during a hot-attachment event. with a 33f, 16v tantalum or 100f, 10v electrolytic capacitor mounted close to downstream connector per port should provide transient drop protection. printed circuit layout the power circuitry of usb printed circuit boards requires a customized layout to maximize thermal dissipation and to minimize voltage drop and emi.
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 feb 10, 2004 6/9 marking information sot23-5l xx y m x 7 12 3 4 5 xx : identification code (see appendix) y : year: 0-9 m : month: a~l x : blank : normal l : lead free package sot23-6l 7 12 3 4 5 6 xx y m x sot89-5l 1 2 3 5 7 4 xx y m x appendix part number package identification code ap1201al sot23-5/sot89-5 fl ap1201cl sot23-6 fl ap1201ah sot23-5/sot89-5 fh ap1201ch sot23-6 fh ap1201bl sot23-5/sot89-5 f1 ap1201bh sot23-5/sot89-5 f2
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 feb 10, 2004 7/9 package information (1) package type: sot23-5l gauge plane 0.25 mm l l1 e1 e e1 d 123 4 5 b e b1 b c c1 base metal with plating a2 a1 a seating plane 0.10 c 5x 2(4x) 1(4x) dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.05 1.20 1.35 0.041 0.047 0.053 a1 0.05 0.10 0.15 0.002 0.004 0.006 a2 1.00 1.10 1.20 0.039 0.043 0.047 b 0.25 - 0.55 0.010 - 0.022 b1 0.25 0.40 0.45 0.010 0.016 0.018 c 0.08 - 0.20 0.003 - 0.008 c1 0.08 0.11 0.15 0.003 0.004 0.006 d 2.70 2.85 3.00 0.106 0.112 0.118 e 2.60 2.80 3.00 0.102 0.110 0.118 e1 1.50 1.60 1.70 0.059 0.063 0.067 l 0.35 0.45 0.55 0.014 0.018 0.022 l1 0.60 ref. 0.024 ref. e 0.95 bsc. 0.037 bsc. e1 1.90 bsc. 0.075 bsc. 0 o 5 o 10 o 0 o 5 o 10 o 1 3 o 5 o 7 o 3 o 5 o 7 o 2 6 o 8 o 10 o 6 o 8 o 10 o
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 feb 10, 2004 8/9 package information (continued) (2) package type: sot23-6l c b g a h (ref.) e 0.20 j (ref.) i (ref.) k (ref.) f d (typ.) ll 1 3 4 65 2 dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 2.70 2.90 3.10 0.106 0.114 0.122 b 2.60 2.80 3.00 0.102 0.110 0.118 c 1.40 1.60 1.80 0.055 0.063 0.071 d 0.30 0.43 0.55 0.012 0.017 0.022 e 0 0.05 0.10 0.000 0.002 0.004 f 0 o - 10 o 0 o - 10 o g 1.90 ref. 0.075 ref. h 1.20 ref. 0.047 ref. i 0.12 ref. 0.005 ref. j 0.37 ref. 0.015 ref. k 0.60 ref. 0.024 ref. l 0.95 ref. 0.037 ref.
ap1201 single-channel power distribution switch anachip corp. www.anachip.com.tw rev.0.4 feb 10, 2004 9/9 (3) package type: sot89-5l d c a i h g e b k j l f f dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 4.40 4.50 4.60 0.173 0.177 0.181 b 4.05 4.15 4.25 0.159 0.163 0.167 c 1.50 1.60 1.70 0.059 0.063 0.067 d 1.30 1.40 1.50 0.051 0.055 0.059 e 2.40 2.50 2.60 0.094 0.098 0.102 f 0.80 - - 0.031 - - g 3.00 ref. 0.118 ref. h 1.50 ref. 0.059 ref. i 0.40 0.46 0.52 0.016 0.018 0.020 j 1.40 1.50 1.60 0.055 0.059 0.063 k 0.35 0.39 0.43 0.014 0.015 0.017 l 5 o typ. 5 o typ.
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