The UTC US201/A series are 80m, 500mA for US201 (1.1A for US201A) high-side power switches. There's internal single low voltage N-Channel MOSFET which makes it an ideal for all USB applications. This MOSFET should be driven by a charge pump circuitry inside. Its switch on resistance is as low as 80m which we know specially meets the drop voltage for USB applications. The flag pin can output an open-drain fault flag to next controller. There're lots internal special ways for protecting the chip's operation.