usb 电源转换器 the xz1101 is an integrated 100mω power switch for self-powered and bus-powered univeal series bus (usb) applicatio. a built-in charge pump is used to drive the n-channel nmosfet that is free of parasitic body diode to eliminate any reveed current flow across the switch when it is powered off. its low quiescent supply current (23μa) and small package (sot23-5) is particularly suitable in battery-powered portable equipment.several protection functio include soft start to limit inrush current during plug-in, current limiting at 1.5a to meet usb power requirement, and thermal shutdown to protect damage under over current conditio.