elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 1/10 general description th e elpw5209 is an i nte grate d 90m power switch for self-powered and bus powered univ ersal series bus(usb) applications. abuilt-in charge pump is used to driv e the n-channel mosfet that is free of parasitic bo dy diode to eliminate any reversed current flow across the swit ch when it is powered off. its low quiescent curre nt(16 a) and small package (sot-23-5) is particularly suitable i n battery-powered portable equipment. several prote ction functions include soft start to limit inrush curren t during plug-in, current limiting at set to meet p ower requirement, and thermal shutdown to protect damage under over c urrent conditions. features 90m low rdson, high-side nmosfet guaranteed 2.95a continuous current 2.5v to 6v input voltage low quiescent current:16ua soft start function built-in short-circuit protection built-in thermal protection rohs compliant and 100% lead(pb) -free applications power switch usb device battery charger circuits pin assignments sot23-5l elp5209b~h elp5209a
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 2/10 pin description sot23-5 pin name pin function 1 vout out put pin. 2 gnd ground. oc low to indicate over current status. 3 set connect a resistor to gnd for programming curre nt. 4 en device enable. 5 vin in put pin. ordering information elpw5209 x x xx x part number marking information elp5209xnb2r ELP5209XSB2R b2 sot23 - 5 r tape & reel over current limited: a adj b 2.45a c : 1.75a e 1.10a f 1.40a g 2.95a h 2.10a en level: n active high s active low
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 3/10 function block diagram (for elpw5209b~h) typical application circuit
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 4/10 absolute maximum ratings input voltage to gnd (v inb~h ,v ina )-------------------------------------------------- -----------------------------------------6v en voltage----------------------------------------- --------------------------------------------------- ------------------0.3v to 6v operating junction temperature range(tj)----------- ------------------------------------------------ -20 to 150 maximum soldering temperature (at leads,10sec)----- --------------------------------------------------- ----- 260 hbm (human body mode)------------------------------ --------------------------------------------------- ----------------2kv thermal information maximum power dissipation(pd)---------------------- --------------------------------------------------- ----------- 0.25w thermal resistance(ja) ---------------------------- --------------------------------------------------- ---------------250 /w electrical characteristics (over recommended operating conditions unless speci fied otherwise)vin=3.6v,en= high, ta=25 ) symbol parameter conditions min. typ. max. unit v in input voltage 2.5 5.5 v lpw5209bn 2.45 lpw5209cn 1.75 lpw5209en 1.1 lpw5209fn 1.4 lpw5209gn 2.95 lpw5209hn 2.15 i limit output current limit lpw5209an,rset=6.8k 1 a sot23-5 90 r ds(on) output nmosfet r ds(on) sop8 70 m i q quiescent current vin=3v 16 28 ua i shdn shut down current en=gnd 1 a v en(l) enable threshold low 0.4 v v en(h) enable threshold high 1.4 v i en input low current v in =v en =5v -1 1 a
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 5/10 typical operation characteristics
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 6/10
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 7/10
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 8/10 application information the elpw5209 are single n-channel mosfet high-side power switches with active-high enable input, optim ized for self-powered and bus-powered universal serial b us(usb) applications. the elpw5209 equipped with a charge pump circuitry to drive the internal nmos sw itch; the switch's low r ds(on) , 90m , meets usb voltage drop requirements; and a flag output is available to ind icate fault conditions to the local usb controller. inputandoutput vin(input) is the power source connection to the in ternal circuitry and the drain of the mosfet.vout(o utput) is the source of the mosfet. in a typical application, current flows through the switch from vin to vout to ward the load. if vout is greater than vin, current will flo w from vout to vin since the mosfet is bidirectiona l when on. unlike a normal mosfet, there is no a parasitic bod y diode between drain and source of the mosfet, the elpw5209 prevents reverse current flow if vout bein g externally forced to a higher voltage than vin wh en the output disabled (ven<0.4v). chip enable input the switch will be disabled when the en pin is in a logic low condition(elp5209a). during this conditi on, the internal circuit is turned off, reducing the supply current to 0.1 a typical. the maximum guaranteed voltage for a logic low at the en pin is 0.4v. a minimum guarante ed voltage of 1.4v at the en pin will turn the elpw 5209 back on. floating the input may cause un predictable ope ration. en should not be allowed to go negative wit h respect to gnd. the en pin may be directly tied to vin to keep the part on. soft start for hot plug-in applications in order to eliminate the up stream voltage droop c aused by the large inrush current during hot-plug e vents, the soft-start feature effectively isolates the power source from extremely large capacitive loads, sat isfying the usb voltage droop requirements. fault flag the elpw5209 provides a oc signal pin which is a n- channel open drain mosfet output. this open drain output goes low when vout elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 9/10 thermal shut down thermal shut down is employed to protect the device from damage if the die temperature exceeds approxi mately 150c. if enabled, the switch automatically restarts when the die temperat ure falls 20c. the output and oc signal will continue to cycle on and off until the device is disabled or the fault is re moved.
elpw5209 e-cmos corp. (www.ecmos.com.tw) 5k1 8 n - rev. f001 power loading switches with flag/adj. 10/10 package information(sot23-5)
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