8.2.3 Particular Considerations

Using the MCP16502, the system can be configured for automatic start-up (see Power Management Unit). Start-up occurs as soon as 5V_MAIN voltage is present, provided that an external capacitor is connected on nSTART_SOM (pin 75).

For this configuration, the external capacitor value must be selected with great care. The recommendations described in the MCP16502 PMIC data sheet under “nSTRT Capacitor for Automatic Turn-On on VIN Ramping” must be followed. For more information, refer to the MCP16502 PMIC data sheet (see Reference Documents).