Nisshinbo Micro Devices R5524N001A-TR-FE, 1High Side, High side Power Switch IC 5, 6-Pin, SOT-23-5

The Nisshinbo Micro Devices MOSFET switch IC conforms to the universal serial bus standard. It can also be used as a load switch IC with protection function. By using an Nch MOSFET with low On resistance as a switching transistor, the device can provide low dropout voltage. Internally, the device consists of an overcurrent limiting circuit, a thermal shutdown circuit, an under voltage lockout circuit and a reverse current protection circuit.

Switch on resistance is typical 100 mΩ at 5 V input
Overcurrent limit is minimum 550 mA