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fp6861e-a is a cost-effective, low voltage, adjustable current limit, single n-channel mosfet high-side power switch, optimized for self-powered and bus-powered universal serial bus (usb) applications. fp6861e-a is equipped with a charge pump circuitry to drive the internal mosfet switch. the switch's low rds(on) meets usb voltage drop requirement, and a flag output is available to indicate fault conditions to the local usb controller. fp6861e-a also provides adjustable current limit threshold between 0.125~3.76a through an external resistor. additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, and under-voltage lockout (uvlo) to ensure that the device remains off unless there is a valid input voltage present. besides, fault current is limited to specific current for fp6861e-a in single port in accordance with the usb power requirements. fp6861e-a will prevent reverse current with reverse voltage protection. fp6861e-a is available in sot-23-6 and tdfn-6 (2mm×2mm) packages with smallest components.