ADM00427: 3V @ 3A, 6 ~ 18V in

The MCP16323 Evaluation Board is designed to operate from a 6V to 18V input and regulate the output to 3.0V. Test points for input power and load are provided to demonstrate the capability of the MCP16323 Evaluation Board over the entire range. The MCP16323 Evaluation Board was designed using small surface-mount components to show application size for a high-voltage buck design.

The MCP16323 is a highly integrated, high-efficiency, fixed frequency, synchronous,
step-down DC-DC converter in a popular 16-pin QFN package that operates from input
voltage sources up to 18V. Integrated features include a low resistance high-side
switch, low resistance low-side switch, 1.0 Mhz fixed-frequency peak-current mode
control, internal compensation, power good output, peak current limit, VOUT overvoltage
and overtemperature protection. Minimal external components are necessary to
develop a complete step-down DC-DC converter power supply. The MCP16323 draws
less than 10 μA while disabled.

High converter efficiency is achieved by integrating the current limited, low resistance,
high-speed N-Channel MOSFETs and associated drive circuitry. Incorporating both the
upper and lower switches reduces the need for external components. High switching
frequency minimizes the size of external filtering components resulting in an overall
small solution size.

The MCP16323 can supply 3A of continuous current while regulating the output voltage
from 0.9V to 5V. An integrated high-performance peak-current mode architecture
keeps the output voltage tightly regulated even during input voltage steps and output
current transient conditions that are common in power systems.