The MP5021B is a hot-swap protection device designed to protect circuitry on its output from transients on its input. It also protects its input from undesired shorts and transients coming from its output.

An internal charge pump drives the gate of the power device, allowing for a power FET with a very low ON resistance of 7mΩ.

The MP5021B includes an optional discharge function that provides a discharge path for the external output capacitor when the part is disabled. Fault protection includes current limit, thermal shutdown and damaged MOSFET detection. Both of the current limit and thermal shutdown have user settable auto retry and latch off mode. The device also features over-voltage protection and under-voltage protection

The MP5021B is available in 3mmx5mm QFN package.