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|||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||| 70 m? current - limited, power - distribution switc hes 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 1 p i5pd2041b/51b features ? 70 m? high - side mosfet ? 0.5 a continuous current ? thermal and short - circuit protection ? accurate current limit ( 1 . 0 a typ. ) ? operating range: 2.7v to 5.5v ? 0.6 ms typical rise time ? under - v oltage lockout ? deglitched fault report ( / oc) ? 1 a maximum standby supply current ? reverse current b locking ? ambient temperature range: - 40c to 85c ? ul recognized, file number e 341484 applica tion s ? l aptop, motherboard pc ? usb bus/self powered hubs ? tv and set - top box power switch ? usb peripherals ? battery - powered equipment ? hot - plug power supplies pin configuration pi5pd20 4 1 b sot23 - 5 (top view) pi5pd2051 b sot23 - 5 (top view) description the PI5PD2041B/51b is an integrated 70 m? n - channel mosfet power switches for self - powered and bus - powered universal series bus (usb) applications. the devices are equipped with charge pump circuitry to drive the internal mosfet switch. the switch s low r ds ( on ) , 70 m? meets usb voltage drop req uirements. this power - distribution switch is des igned to set current limit at 1. 0 a typically . when the output load exceeds the current - limit threshold or a short - circuit situation is present, the device s limit the output current by switching into a constan t - current mode, pulling the over - current ( / oc ) logic output low. when continuous heavy overloads and short - circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit turns off the switch to prevent damage. recovery from a thermal shutdown is automatic once the device has cooled sufficiently. internal circuitry ensures that the switch remains off until valid input voltage is present.. pin d escription pin no. pin type description 2 gnd - gro und. 5 in i power input v oltage. 4 /en (PI5PD2041B) i chip enable, logic low turns on power switch. 4 en (pi5pd2051b) i chip enable, logic high turns on power switch. 3 /oc o over current, open - drain output, active - low. 1 out o power output voltage g n d i n / e n / o c o u t 1 2 3 5 4 p t 7 m 2 6 0 1 / p t 7 m 2 0 6 5 d b v p a c k a g e ( t o p v i e w ) g n d i n i n * / e n / o c o u t o u t o u t o 1 2 3 4 5 6 7 8 p t 7 m 2 0 6 1 / p t 7 m 2 0 6 5 d a n d d g n p a c k a g e ( t o p v i e w ) o p t 7 m 2 0 6 2 ( - 1 ) / p t 7 m 2 0 6 6 ( - 1 ) d a n d d g n p a c k a g e ( t o p v i e w ) g n d i n * / e n 1 * / e n 2 / o c 2 o u t 2 o u t 1 / o c 1 1 2 3 4 5 6 7 8 g n d i n i n e n / o c o u t o u t o u t o 1 2 3 4 5 6 7 8 p t 7 m 2 0 6 5 - 1 d g n p a c k a g e ( t o p v i e w ) g n d i n e n / o c o u t 1 2 3 5 4 p t 7 m 2 6 0 1 / p t 7 m 2 0 6 5 d b v p a c k a g e ( t o p v i e w ) g n d i n i n * / e n / o c o u t o u t o u t o 1 2 3 4 5 6 7 8 p t 7 m 2 0 6 1 / p t 7 m 2 0 6 5 d a n d d g n p a c k a g e ( t o p v i e w ) o p t 7 m 2 0 6 2 ( - 1 ) / p t 7 m 2 0 6 6 ( - 1 ) d a n d d g n p a c k a g e ( t o p v i e w ) g n d i n * / e n 1 * / e n 2 / o c 2 o u t 2 o u t 1 / o c 1 1 2 3 4 5 6 7 8 g n d i n i n e n / o c o u t o u t o u t o 1 2 3 4 5 6 7 8 p t 7 m 2 0 6 5 - 1 d g n p a c k a g e ( t o p v i e w )
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 2 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes functional block diagram note a: current sense note b: active low ( /en) for pi5pd 20 41b; active high ( en) for pi5pd2051b maximum ratings storage temperature ................................ ................................ .............. - 65 o c to +150 o c operating virtual junction temperature range, t j ............................. - 40 o c to + 125 o c input voltage range ( v i(in) (2) ) ................................ ................................ ...... - 0.3v to +6v output voltage range ( v o(out ) (2) ) ................................ .............................. - 0.3v to +6v input voltage range (v i( /en ) , v i( en ) ) ................................ .............................. - 0.3v to +6v voltage range (v i( /oc ) , v i( oc ) ) ................................ ................................ ....... - 0.3v to +6v continuous output current ( i o(out ) ) ................................ ........................... internally li mit power dissipation ................................ ................................ ................. s ot23 - 5 / 400 mw electrostatic discharge (esd) protection .......... 4 kv/human body mil - std - 883c electrostatic discharge (esd) protection ............ 500v/charge device model(cdm) recommended operating conditions symbol description min type max unit v i(in) input voltage 2.7 - 5.5 v v i( /en ) , v i( en ) input voltage 0 - 5.5 v i o(out ) continuous output current 0 - 0.5 a t j operating v irtual j uncti on temperature r ange - 40 - 125 oc note: (1) stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other con ditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. (2)all voltages are with respect to gnd.
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 3 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes electrical characteristics unless otherwise specified, v i(in) = 5 .5 v , i o = 0.5 a , v i( / en ) = 0 v , v i( en ) = 5 .5 v . sym description test c onditions (1) min typ max unit power switch r ds(on) static drain - source on - state resistance, 5v operation and 3.3v operation v i(in) = 5v or 3.3v, i o = 0.5a , - 40c t j 125c ? (2) v i(in) = 2.7v, i o = 0.5a , - 40c t j ? r (2) rise time, output v i(in) = 5.5v c l =1 ? l = 10 ?, t j =25c - 0.6 1.5 ms v i(in) = 2.7v - 0.4 1 t f (2) fall time, output v i(in) = 5.5v 0.05 - 0.5 v i(in) = 2.7v 0.05 - 0.5 enable input /en or en v ih high - level input voltage 2.7 v v i(in) 5.5 v il low - level input voltage 2.7 v v i(in) 5.5 v i input current v i( / en ) = 0 v or 5.5 v - 0.5 - 0.5 ? on (2) turn on time c l = 100 ? l = 10 ? off (2) turn off time c l = 100 ? l = 10 ? current limit i os short - circuit output current v i(in) =5v, out connected to gnd, device enabled into short - circuit t j =25c 0.75 1 1. 25 a - 40c t j oc - trip over - current trip threshold v i(in) =5v, current ramp ( 100 a/s supply current i stb input s upply current at output disable no load on out, v i(/ en ) = 5.5v, or v i( en ) =0v t j =25c - 0. 1 - ? t j s s input s upply current at output enable no load on out, v i(/ en ) = 0v, or v i( en ) = 5.5v t a =25c - 43 - - 40c t j i(/ en ) = 5.5v, or v i( en ) = 0v - 40c t j i(out) =5.5v, in = ground (2) t j =25c - 0 .1 - under - voltage lockout low - level input voltage, in - 2 - 2.5 v hysteresis, in t j =25c - 75 - mv over - current /oc output low voltage, v ol( / oc) i o( / oc) = 5ma - - 0.4 v off - state current ( 2 ) v o( / oc) = 5v or 3.3v - - 1 ? ( 2 ) / oc assertion or de - assertion 4 12 15 ms thermal shutdown (3) thermal shutdown threshold ( 2 ) - 135 - - c recovery from thermal shutdown ( 2 ) - 125 - - c hysteresis ( 2 ) - - 10 - c note: (1) pulse - testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account separately. (2) not tested in production, specified by design. (3) the thermal shutdown only reacts under over curr ent conditions.
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 4 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes typical performance and characteristics 1. turn on delay and rise time pi5pd2041 b r l =5 ? , c l = 1 f , t a =25 pi5pd2041 b r l =5 ? , c l = 1 f , t a =25 pi5pd2041 b r l =5 ? , c l = 100 f , t a =25 pi5pd2041 b r l =5 ? , c l = 100 f , t a =25 v i(/en) 5v/div v o ( out ) 2v/div time (200 s/div) v i(/en) 5v/div v o ( out ) 2v/div time (200 s/div) v i(/en) 5v/di v v o ( out ) 2v/div time (200 s/div) v i(/en) 5v/div v o ( out ) 2v/div time ( 4 00 s/div)
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 5 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes 2. o ver current /oc response pi5pd2041 b t a =25 , r l =2 ? , c l = 0.1 f 3. outpu t short to ground then enable pi5pd20 41 b t a =25 4. inrush current PI5PD2041B t a =25 , v i(in) =5v, r l =10 ? v i ( /en ) 5v/div i o(out) 0.5a/div time (200 s/div) v o( / oc) 5v/div i o(out) 0.5a/div time (2ms/div) i o(out) 0.5a/div v i( / en) 5v/div time ( 1 ms/div)
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 6 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes 5. turn o n/ o ff time vs. input voltage turn on time r l =5 ? , c l = 100 f , t a =25 turn off time r l =5 ? , c l = 100 f , t a =25 6. rise and fall t ime vs. input voltage rise time r l =5 ? , c l = 1 f , t a =25 fall time r l =5 ? , c l = 1 f , t a =25 400 500 600 700 800 2 3 4 5 6 input voltage (v) turn on time (s) 0 200 400 600 800 2 3 4 5 6 input voltage (v) turn off time (s) 0 200 400 600 800 2 3 4 5 6 input voltage (v) rise time (s) 0 100 200 300 400 2 3 4 5 6 input voltage (v) fall time (s)
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 7 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes 7. input supply current vs. ambient temperature output enable, t a =25 output disable, t a =25 8. static drain - source on resistance vs. ambient temperature 0 20 40 60 -50 0 50 100 150 ambient t emperature( ) out enable supply current (a) vin=5.5v vin=5v vin=3.3v vin=2.7v 0 40 80 120 160 200 -50 0 50 100 150 ambient t emperature ( ) out disable supply current (na) vin=5.5v vin=5v vin=3.3v vin=2.7v 0 20 40 60 80 100 -50 0 50 100 150 ambient t emperature( ) on resistance (m) vin=5v vin=3.3v vin=2.7v
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 8 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes 9. current limit vs. ambient temperature threshold trip current vs. input voltage short - c ircuit output current vs. ambient temperature 0 1 2 3 2 3 4 5 6 input voltage (v) threshold trip current (a) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 -50 0 50 100 150 ambient t enperature ( ) short circuit current (a) vin=5.5v vin=5v vin=3.3v vin=2.7v
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 9 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes application information the power swit ch is an n - channel mosfet with a low r ds (on) 70m? resistance. configured as a high - side switch, the power switch prevents leakage current flow from output to input when chip disabled. the power switch supplies a maximum continuous current up to 0.5 a. power - supply c onsiderations figure 1 typical application circuit a 0.01 f to 1f ceramic bypass capacitor between in and gnd, close to the device, is recommended. placing a high - value electrolytic capacitor on the output pin(s) is recommended when the output load is heavy. th is precaution reduces power - supply transients that may cause ringing on the input. additionally, bypassing the output with a 0.01f to 1f ceramic capacitor improves the immunity of the device to short - circuit transients. enable ( / en or en) the enable pi n is logic enable & disables the power switch , which is compatible with cmos and ttl logic levels . the supply current is reduced to less than 1a when a logic high is present on / en, or when a logic low is present on en. a logic zero input on / en, or a log ic high input on en res tores the bias to the drive r and control circuits and turns the switch on /oc output the / oc open - drain output is asserted (active low) when an over current or over temperature condition is asserted . the output remains asserted unt il the over current or over temperature condition is removed. the / oc pin requires a pull - up resistor, this resistor should be larger to reduce energy drain. a 100k ? pull - up resistor works well for most applications. in the case of an over - current or short - circuit conditions, / oc will be asserted only after response delay time, td, 1 4 ms have elapsed. if an over temperature shutdown occurs, the / oc is asserted instan taneously. figure 2 typical circuit for the /oc pin in /en /oc gnd out PI5PD2041B v+ r pull - up in /en /oc gnd out 0.1 f 22 f 0.1 f power supply 2.7v to 5.5v load PI5PD2041B
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 10 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes under - voltage lockout (uvlo) a voltage sense circuit monitors the input voltage , a n under voltage lockout ensures that the power switch is in the off state at power up . whe n the input voltage is below approximately 2v, a control signal turns off the power switch. power d issipation calculation the low r d s (on) resistance on the n - channel mosfet allows the small surface - mount packages to pass large currents. the thermal resist ances of these packages are high compared to those of power packages. begin by determining the r ds(on) of the n - channel mosfet relative to the input voltage and operating temperature. using this value, the power dissipation per switch can be calculated by: ? p d = r ds(on) i 2 multiply this number by the number of switches being used. this step renders the total power dissipation from the n - channel mosfet. finally, calculate the junction temperature: ? t j = p d x r ja + t a where: ? t a = ambient temperature c ? r ja = thermal resistance ? p d = total power dissipation based on number of switches being used. thermal protection thermal protection prevents damage to the ic when heavy - overload or short - circuit fault s are present for extended periods of time. the pi5pd20 41b / 51b implements a thermal protection circuitry to monitor the operating junction temperature of the power distribution switch. in an over current or short - circuit condition cause to the junction tem perature rises , w hen the die temperature rises to approximately 1 35 c due to over current conditions, the internal thermal protection circuitry turns off the switch, thus preventing the device from damage. hysteresis is built into the thermal protection ci rcuitry , and after the device has cooled approximately 10 degrees, the switch turns back on. the switch continues to cycle off and on until the fault is removed. the open - drain false reporting output ( / oc) is asserted (active low) when an over temperature shutdown or over current occurs. universal s erial b us (usb) a pplication the universal serial bus (usb) interface is a 480mb/s or 12mb/s, multiplexed serial bus designed for low - to - medium bandwidth pc peripherals (e.g., keyboards, printers, scanners, and mice). the four - wire usb interface is conceived for dynamic attach - detach (hot plug - unplug) of peripherals. two lines are provided for differential data, and two lines are provided for 5v power distribution. usb data is a 3.3v level signal, but power is d istributed at 5v to allow for voltage drops in cases where power is distributed through more than one hub across long cables. each function must provide its own regulated 3.3v from the 5v input or its own internal power supply. the usb specification defi nes the following five classes of devices, each differentiated by power - consumption requirements: ? hosts/self - powered hubs (sph) ? bus - powered hubs (bph) ? low - power, bus - powered functions ? high - power, bus - powered functions ? self - powered functions sphs and bphs distribute data and power to downstream functions. the pi5pd20 41b/51b has higher current capability than required by one usb port; so, it can be used on the host side and supplies power to multiple downstream ports or functions. host/ self - powered and bus - powered h ubs hosts and sphs have a local power supply that powers the embedded functions and the downstream ports ( see figure 3) . this power supply must provide from 5.25v to 4.75v to the board side of the downstream connection under full - l oad and no - load conditions. hosts and sphs are required to have current - limit protection and must report over current conditions to the usb controller. typical sphs are desktop pcs, monitors, printers, and stand - alone hubs.
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 11 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes figure 3 typical one - port usb host/self - powered hub bphs obtain all power from upstream ports and often contain an embedded function. the hubs are required to power up with less than one unit load. the bph usually has one embedded function, and power is a lways available to the controller of the hub. if the embedded function and hub require more than 100ma on power up, the power to the embedded function may need to be kept off until enumeration is completed. this can be accomplished by removing power or by shutting off the clock to the embedded function. power switching the embedded function is not necessary if the aggregate power draw for the function and controller is less than one unit load. the total current drawn by the bus - powered device is the sum of the current to the controller, the embedded function, and the downstream ports, and it is limited to 500ma from an upstream port. in /en /oc gnd out 0.1 f 120 f 0.1 f power supply 3.3v 5v PI5PD2041B d+ d - vbus gnd usb controller downstream usb ports
|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 2013 - 07 - 0009 pt0317 - 5 07 / 3 1 /1 3 12 PI5PD2041B/51b 70 m? current - limited, power - distribution switc hes mechanical information ta e(lead free and green sot23 - 5) ordering information part number p ackage code package pi5pd20 41btae ta lead free and green 5 - pin sot23 pi5pd20 51btae ta lead free and green 5 - pin sot23 notes: ? e = pb - free and green ? adding x suffix = tape /r eel function comparison table part number enable recommended maximum continuous l oad current typical short circuit current limit at 25 oc number of switch PI5PD2041B active low 0.5 a 1a single pi5pd2051b active high single pericom semiconductor corporation ? 1 - 800 - 435 - 2336 ? www.pericom.com pe ricom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve d esign or performance and to supply the best possible product. pericom does not assume any responsibility for use of any circuitry d escribed other than the circuitry embodied in pericom product. the company makes no representations that circuitry described herein is free from patent infringement or other rights, of pericom .

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