3.7 Power Management Circuit

The MCP16501 is a high-performance power management IC that provides three output voltages with maximum efficiency, compatible with Microchip’s eMPUs (Embedded Microprocessor Units) and associated DRAM memories. It is compatible with the SAMA5D2 Series, SAM9X60 and SAMA7G5 Series MPUs, which are supported by dedicated variants.

The MCP16501 integrates three DC-DC buck regulators and one auxiliary LDO, providing a comprehensive interface to the MPU.

All buck channels can support loads up to 1A and are 100% duty-cycle capable.

For more information about the MCP16501, refer to the product web page.

Detailed information on the SAM9X75D2G MPU power supplies and power-up/down considerations is described in the section “Electrical Characteristics” in the SAM9X7 Series data sheet. Refer to Reference Documents.

The MCP16501 is preset to supply all the voltage rails needed by the system:

• OUT1: 3.3V supplies the SAM9X75D2G I/O pads.
• OUT2: 1.35V supplies the SAM9X75D2G DDR3L pads (VDDIODDR).
• OUT3: 1.15V supplies the SAM9X75D2G core (VDDCORE).

The following figure shows the power management scheme.