2.1.2 Recommended Power Implementations

MCP16502 and MCP16501 are multi-channel Power Management Integrated Circuits (PMICs) recommended for the SAM9X7 Series MPUs.

Figure 2-1. MCP16502 Simplified Application Block Diagram

MCP16502 features four 1A DC-DC buck regulators and two 0.3A auxiliary LDO regulators, and provides a comprehensive interface to the MPU, which includes an interrupt flag and a 1-MHz I²C interface. The two LDO regulator outputs LOUT1 and LOUT2 are auxiliary power rails available for the application. LOUT1 output is on by default at power-up and its default voltage is set to 1.8V, 2.5V or 3.3V depending on the SELV1 pin connection. Buck4 and LOUT2, off by default at power-up, can be started by software through the I²C control bus to the necessary voltage.

Figure 2-2. MCP16501 Simplified Application Block Diagram

MCP16501 is a 4-channel PMIC designed for PCB area constrained applications. In a 4x4mm QFN24 package, it features three 1A DC-DC buck regulators and one 0.3A auxiliary LDO regulator, and provides a simple, leakage-free interface with the SAM9X7 Series MPU. The 3.3V, 1.35V/1.5V/1.8V and 1.15V supply rails are fed from DC-DC converters for maximum efficiency. The LDO regulator output LOUT is controlled with the LEN input and its output voltage is set with a resistive divider.

For further details, refer to the MCP16501 and MCP16502 documentation. See References.