The R5523N001A-TR-FE from Nisshinbo Micro Devices is a High-Side MOSFET Power Switch IC that is designed for USB applications. It requires an input voltage of 2.2-5.5 V and provides an output current of 500 mA. This power switch has a low ON resistance of 130 milli-ohms and requires a low supply current of 20 mA. It benefits from over-current limit, short circuit protection, built-in under voltage lockout (UVLO) function, built-in thermal shutdown protection and built-in soft-start function. This power switch features a built-in delay circuit for the flag signal after detecting an overcurrent event, preventing false error flag triggers caused by inrush current. It is available in a surface-mount package that measures 2.9 x 2.8 x 1.1 mm and is ideal for USB peripherals and notebook PCs.