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The MP5023 is a hot-swap protection device designed to protect circuitry on its output from transients on its input. The MP5023 also protects its input from undesired shorts and transients coming from its output.
During start-up, inrush current is limited by the slew rate at the output. The slew rate is controlled by the external capacitor at SS.
The maximum load at the output is current-limited through on-die current sense technology. The magnitude of the current limit is controlled by a low-power resistor from ISET to ground.
An internal charge pump drives the gate of the power device, allowing for a power MOSFET with a very low on resistance of 1.1mΩ.