The MP5017A is a protection device designed to protect circuitry on the output from transients at the input. It also protects the input from unwanted shorts and transients at the output.

During start-up, the inrush current is controlled by limiting the slew rate at the output. The slew rate is controlled by a small capacitor connected at the DV/DT pin.

The maximum output load is current-limited. The magnitude of the current limit (I_LIMIT) is controlled by an external resistor connected between the ILIMIT and GND pins. By controlling the gate voltages via a pair of N-channel MOSFETs, any current flowing from the output to the input is blocked.

Under-voltage lockout (UVLO) protection ensures that the input is above the minimum operating threshold before the device starts up. If the input voltage (V_IN) exceeds 5.8V, then the output voltage (V_OUT) is limited to 5.8V. The SAS/OV pin programs the V_IN over-voltage protection (OVP) threshold. The FAULT pin is an open-drain output that goes low if an over-current (OC), over-temperature (OT), or output over-voltage (OV) fault is detected.

The MP5017A is available in a QFN-12 (2mmx3mm) package.