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june 2010 ? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit FPF2193 / fpf214 / fpf2195 full-function load switch with adjustable current limit features ? <1.8 to 5.5v input voltage range ? controlled turn-on ? 0.1 to 1.5a adjustable current limit ? under-voltage lockout ? thermal shutdown ? <2a shutdown current ? auto restart ? fast current limit response time ? 5s to moderate over currents ? 30ns to hard shorts ? fault blanking ? reverse current blocking applications ? pdas ? cell phones ? handheld gps devices ? portable enterprise / industrial devices ? digital cameras ? peripheral ports and accessories ? portable medical equipment ? hot swap supplies description the FPF2193, fpf2194, and fpf2195 form a series of load switches that provides full protection to systems and loads that may encounter large current conditions. these devices contain a 55m ? current-limited p- channel mosfet that can operate over an input voltage range of 1.8 to 5.5v. internally, current is prevented from flowing when the mosfet is off and the output voltage is higher than the input voltage. switch control is by a logic input (on) capable of interfacing directly with low-voltage control signals. each part contains thermal shutdown protection that shuts off the switch to prevent damage to the part when a continuous over-current condition causes excessive heating. when the switch current reaches the current limit, the parts operate in a constant-current mode to prohibit excessive currents from causing damage. for the FPF2193 and fpf2194, if the constant current condition still persists after 30ms, the parts shut off the switch and pull the fault signal pin (flagb) low. the FPF2193 has an auto-restart feature that turns the switch on again after 450ms if the on pin is still active. the fpf2194 does not have this auto-restart feature, so the switch remains off until the on pin is cycled. the fpf2195 does not turn off after a current limit fault, but remains in the constant-current mode indefinitely. the minimum current limit is 100ma. these parts are available in a space-saving six ball advanced 1 x 1.5mm wlcsp package. ordering information part number current limit [ma] current limit blanking time [ms] auto-restart time [ms] on pin activity top mark FPF2193 100-1500 15/30/60 225/450/900 active high s6 fpf2194 15/30/60 na s7 fpf2195 0 na s9
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 2 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit application diagram figure 1. typical application block diagram figure 2. functional block diagram
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 3 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit pin configuration figure 3. 1.0 x 1.5mm chip-scale package figure 4. pin configuration (bottom view) pin definitions pin # name description c1 i set current limit set input. a resistor from i set to ground sets the current limit for the switch. b2 v in supply input. input to the power switch and the supply voltage for the ic. b1 v out switch output. output of the power switch. a1 flagb fault output. active low, open-drain output t hat indicates an over-current supply, under- voltage, or over-temperature state. c2 gnd ground. a2 on on control input, active high.
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 4 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. symbol parameter min. max. unit v in , v out , on, flagb, iset to gnd -0.3 6.0 v p d power dissipation at t a = 25c (1) 1.2 w tj operating temperature range -40 +125 c t stg storage temperature -65 +150 c ja thermal resistance, junction to ambient 85 c/w esd electrostatic discharge capability human body model, jesd22-a114 8000 v machine model, jesd22-a115 400 notes: 1. package power dissipation on one-squar e inch pad, two-ounce copper board. recommended operating conditions the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ens ure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. max. unit v in input voltage 1.8 5.5 v t a ambient operating temperature -40 +85 c
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 5 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit electrical characteristics v in = 1.8 to 5.5v, t a = -40 to +85c unless otherwise noted. typical values are at v in = 3.3v and t a = 25c. symbol parameter conditions min. typ. max. units basic operation v in operating voltage 1.8 5.5 v i q quiescent current i out =0ma, v on =v in v in =1.8v 70 a v in =3.3v 75 v in =5.5v 80 r on on resistance t a =25c, i out =200ma 55 80 m t a =-40 to 85c, i out =200ma 135 v ih on input logic high voltage on v in =1.8v 0.8 v v in =5.5v 1.4 v il on input logic low voltage v in =1.8v 0.5 v v in =%.5v 1.0 on input leakage v on =v in or gnd -1 0 1 a v in shutdown current v on =0v, v in =5.5v, v out =short to gnd -2 2 a v flb_l flagb output logic low voltage v in =5v, i sink =10ma 0.05 0.20 v v in =1.8, i sink =10ma 0.12 0.30 v flb_h flagb output logic high leakage current v in =5v, switch on 1 a reverse block i sdt v out shutdown current v on =0v, v out =5.5v, v in =short-to-gnd -2 2 a v breakdown reverse breakdown voltage v in =v on =0v, i out =200a 9 v protections i lim current limit v in =3.3v, v out =3.0v, r set =690 600 800 1000 ma i lim(min) minimum current limit v in =3.3v, v out =3.0v 100 ma tsd thermal shutdown shutdown threshold 140 c return from shutdown 130 hysteresis 10 v uvlo under-voltage lockout v in increasing 1.55 1.65 1.75 v v uvlo_hyst under-voltage lockout hysteresis 50 mv dynamic td on delay on time r l =500 , c l =0.1f 20 s t r v out rise time r l =500 , c l =0.1f 20 s t on turn-on time r l =500 , c l =0.1f 40 s td off delay off time r l =500 , c l =0.1f 15 s t f v out fall time r l =500 , c l =0.1f 110 s t off turn-off time r l =500 , c l =0.1f 125 s t blank over-current blanking time FPF2193, fpf2194 15 30 60 ms t rstrt auto-restart FPF2193 225 450 900 ms fpf2194, fpf2195 na t sc short-circuit response time v in =v out =3.3v, moderate over- current condition 5 s v in =v out =3.3v, hard short 30 ns
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 6 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit typical performance characteristics figure 5. quiescent current vs. input voltage figure 6. quiescent current vs. input voltage figure 7. quiescent current vs. temperature figure 8. v on high voltage vs. input voltage figure 9. v on low voltage vs. input voltage figure 10. current limit vs. output voltage
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 7 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit typical performance characteristics (continued) figure 11. current limit vs. temperature figure 12. r on vs. v in figure 13. r on vs. temperature figure 14. t on / t off vs. temperature figure 15. t rise / t fall vs. temperature figure 16. t rstrt vs. temperature
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 8 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit typical performance characteristics (continued) figure 17. t blank vs.temperature figure 18. t on response figure 19. t off response figure 20. short-circu it response time (output shorted to gnd) figure 21. current limit response time (switch is powered into a short) figure 22. current limit response time (output is loaded by 2.2 , c out =0.1f)
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 9 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit typical performance characteristics (continued) figure 23. current limit response time (output is loaded by 2.2 , c out =10f) figure 24. short-circu it detection function ( 2 ) figure 25. t blank vs. response ( 3 ) figure 26. t restart vs. response ( 3 ) notes: 2. when the output voltage is below v scth =1.1v, the current limit value is set at 62.5% of the current limit value. 3. v drv signal forces the device to go into over-current condition by loading.
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 10 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit functional description the FPF2193, fpf2194, and fpf2195 are current- limited switches that protec t systems and loads that can be damaged or disrupted by the application of high currents. the core of each device is a 55m ? p-channel mosfet and a controller capable of functioning over the wide input operating range of 1.8- 5.5v. the controller protects against system malfunctions through current limiting, under-voltage lockout, and thermal shutdown. the current limit is adjustable from 100ma to 1.5a through the selection of an external resistor. on/off control the on pin controls the state of the switch. when on is high, the switch is in on state. activating on continuously holds the switch in the on state so long as there is no fault. for all versions, an under-voltage on v in or a junction temperature in excess of 140c overrides the on control to turn off the switch. in addition, excessive currents cause the switch to turn off in the FPF2193 and fpf2194. the FPF2193 has an auto- restart feature that automatic ally turns the switch on again after 450ms. for the fpf2194, the on pin must be toggled to turn the switch on again. the fpf2195 does not turn off in response to an over-current condition, but remains operating in constant-current mode aslong as on is active and the thermal shutdown or under-voltage lockout have not activated. fault reporting upon the detection of an over-current, input under- voltage, or over-temperature condition, flagb signals the fault mode by activating low. for the FPF2193 and fpf2194, the flagb goes low at the end of the blanking time, while flagb goes low immediately for the fpf2195. flagb remains low through the auto- restart time for the fpf2195. for the fpf2194, flagb is latched low and on must be toggled to release it. with the fpf2195, flagb is low during the faults and immediately returns high at the end of the fault condition. flagb is an open-drain mosfet that requires a pull-up resistor between v in and flagb. during shutdown, the pull-down on flagb is disabled to reduce current draw from the supply. current limiting the current limit ensures t hat the current through the switch doesn't exceed a maximum value, while not limiting at less than a minimum value. the current at which the parts limit is adjustable through the selection of an external resistor connected to i set . information for selecting the resistor is found in the application information section. the FPF2193 and fpf2194 have a blanking time of 30ms, nominally, during which the switch acts as a constant current source. at the end of the blanking time, the switch is turned off. the fpf2195 has no current limit blanking period, so it remains in a constant current state until the on pin is deactivated or the thermal shutdown turns off the switch. for preventing the switch from large power dissipation during heavy load, a short-circuit detection feature is introduced. short-circuit condition is detected by, observing the output voltage. the switch is put into short- circuit current-limiting mode if the switch is loaded with a heavy load. when the output voltage drops below v scth , the short-circuit detection threshold voltage, the current limit value is re-conditioned and the short-circuit current- limit value is decreased to 62.5% of the current limit value. this keeps the power dissipation of the part below a certain limit even at dead-short conditions at 5.5v input voltage. the v scth value is set to be 1v. at around 1.1v of output voltage, the switch is removed from short-circuit current-limiting mode and the current limit is set to the current limit value. under-voltage lockout (uvlo) the under-voltage lockout turns the switch off if the input voltage drops below the under-voltage lockout threshold. with the on pin active, the input voltage rising above the under-voltage lockout threshold causes a controlled turn- on of the switch, which limits current over shoot. thermal shutdown the thermal shutdown protects the die from internally or externally generated excessive temperatures. during an over-temperature condition, flagb is activated and the switch is turned off. the switch automatically turns on again if temperature of the die drops below the threshold temperature. reverse-current blocking the entire FPF2193/94/95 family has a reverse current blocking feature that protec ts the input source against current flow from output to input. for a standard usb power design, this is an impor tant feature to protect the usb host from being damaged due to reverse current flow on v bus . when the load switch is off, no current flows from the output to the input. if the switch is turned on and the output voltage is greater than i nput voltage, this feature is activated and turns off the switch. this prevents any current flow from output to input. the reverse-current blocking feature is deactivated if the v out - v in is smaller than a typically 50mv threshold. during this time, some current (50mv/r on ) flows from the output to input until input voltage becomes greater than output voltage. flagb operation is independent of the reverse-current blocking and does not report a fault condition if this feature is activated. figure 27. timing diagram where: td on = delay on time t r = v out rise time t on = turn-on time td off = delay off time t f = v out fall time t off = turn-off time
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 11 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit application information figure 28. typical application setting current limit the FPF2193, fpf2194, and fp f2195 current limit is set with an external resistor connected between i set and gnd. this resistor is selected using the following equation: lim set i 6 . 551 r = (1) r set is in and i set is in amps. table 1 can also be used to select r set . a typical application would be the 500ma current required by a single usb port. using table 1, an appropriate selection for the r set resistor would be 788 ? . this ensures that the port load could draw 525ma, but not more than 875ma. likewise for a dual-port system; an r set of 368 ? always delivers at least 1125ma and never more than 1875ma. table 1. current limit various r set values r set ( ) min. current limit(ma) typ. current limit(ma) max. current limit(ma) 368 1125 1500 1875 441 928 1250 1562 552 750 1000 1250 613 675 900 1125 690 600 800 1000 788 525 700 875 919 450 600 750 1103 375 500 625 1226 338 450 563 1379 300 400 500 1576 263 350 438 1839 225 300 375 2206 188 250 313 2758 150 200 250 3677 113 150 188 5516 75 100 125 input capacitor to limit the voltage drop on the input supply caused by transient inrush currents when the switch is turned on into a discharged load capacitor or a short-circuit, a capacitor needs to be placed between v in and gnd. a 0.1f ceramic capacitor, c in , placed close to the pins is usually sufficient. higher values of c in can be used to further reduce the voltage drop. output capacitor a 0.1f capacitor, c out , should be placed between v out and gnd. this capacitor prevents parasitic board inductances from forcing v out below gnd when the switch turns off. for the FPF2193 and fpf2194, the total output capacitance needs to be kept below a maximum value, c out (max), to prevent the part from registering an over-current condition and turning off the switch. the maximum output capacitance can be determined from the following formula: in blank lim out v (min) t (max) i (max) c = (2) power dissipation during normal operation as a switch, the power dissipated depends upon the level at which the current limit is set. the maximum allowed setting for the current limit is 1.5a and results in a power dissipation of : mw 75 . 123 055 . 0 ) 5 . 1 ( r ) i ( p 2 on 2 lim = = = (3) if the part goes into current limit, the maximum power dissipation occurs when the output is shorted to ground. for the FPF2193, the power dissipation scales by the auto-restart time, t rstrt , and the over-current blanking time, t blank , so that the maximum power dissipated is: mw 6 . 515 5 . 1 5 . 5 450 30 30 (max) i (max) v t t t (max) p lim in rstrt blank blank = + = + = (4)
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 12 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit this is more power than the package can dissipate, but the thermal shutdown of the part activates to protect the part from damage due to excessive heating. when using the fpf2194, attention must be given to the manual resetting of the part. the junction temperature is only able to increase to the thermal shutdown threshold. once this temperature has been reached, toggling on does not turn the switch on until the junction temperature drops. for the fpf2195, a short on the output causes the part to operate in a constant- current state, dissipating a worst-case power of: w 25 . 8 5 . 1 5 . 5 (max) i (max) v (max) p lim in = = = (5) this large amount of power activates the thermal shutdown and the part cycles in and out of thermal shutdown as long as the on pin is active and the short is present. board layout for best performance, all trac es should be as short as possible. to be most effective, the input and output capacitors should be placed close to the device to minimize the effects that parasitic trace inductances may have on normal and short-circuit operation. using wide traces for v in , v out , and gnd help to minimize parasitic electrical effects along with minimizing the case-to-ambient thermal impedance. .
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 13 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit physical dimensions bottom view side views recommended land pattern ball a1 index area seating plane a1 f (nsmd pad type) (?0.350) solder mask opening (x) 0.018 (y) 0.018 (?0.250) cu pad 0.06 c 0.05 c e d f notes: a. no jedec registration applies. b. dimensions are in millimeters. c. dimensions and tolerance per asmey14.5m, 1994. d. datum c is defined by the spherical crowns of the balls. e. package nominal height is 582 microns 43 microns (539-625 microns). f. for dimensions d, e, x, and y see product datasheet. g. drawing filname: mkt-uc006afrev2. 0.03 c 2x 0.03 c 2x ?0.315 +/- .025 6x 1 2 a b c 0.3320.018 0.2500.025 d e (1.00) (0.50) 0.005 cab 0.50 0.50 1.00 0.625 0.539 top view b a c figure 29. 6-ball, wafer-level chip-scale package (wlcsp) product d e x y FPF2193 1.500+/-0.030 1.000+/-0.030 0.240 0.240 fpf2194 1.500+/-0.030 1.000+/-0.030 0.240 0.240 fpf2195 1.500+/-0.030 1.000+/-0.030 0.240 0.240 package drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and condition s, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2009 fairchild semiconductor corporation www.fairchildsemi.com FPF2193/4/5 ? rev. 1.0.4 14 FPF2193 / fpf2194 / fpf2195 ? full function loa d switch with adjustable current limit

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