The MP5042 is a protection device designed to protect circuitry on the output from transients on the input. The MP5042 also protects the input from undesired shorts and transients coming from the output.
During start-up, the inrush current is limited by limiting the slew rate at the output. The slew rate is controlled by setting the DV/DT pin.
The maximum load at the output is currentlimited. The current limit (ILIMIT) magnitude is controlled by an external resistor connected between ILIMIT and GND. The ILIMIT threshold can be set between 25mA and 2A. When the ILIMIT pin is floating, ILIMIT is fixed at 260mA.