MCP16321 EVALUATION BOARD
USER’S GUIDE
2011 Microchip Technology Inc. DS52024A-page 9
Chapter 1. Product Overview
1.1 INTRODUCTION
This chapter provides an overview of the MCP16321 Evaluation Board and covers the
following topics:
• MCP16321 Short Overview
• What is the MCP16321 Evaluation Board?
• MCP16321 Evaluation Board kit contents
1.2 MCP16321 SHORT OVERVIEW
The MCP16321 is a highly integrated, 1A output current capable, high-efficiency, fixed
frequency, synchronous, step-down DC-DC converter in a popular 3 mm x 3 mm
16-lead QFN package that operates from input voltage sources up to 24V. 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, V
OUT
overvoltage and overtemperature protection.
Minimal external components are necessary to develop a complete step-down DC-DC
converter power supply. The MCP16321 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 MCP16321 can supply 1A 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.
The evaluation board is populated with the adjustable version of the MCP16321; V
OUT
is set to 3.0V using an external resistor divider. The evaluation board was developed
to accommodate the MCP16321 fixed output voltage options.
