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Description

The MCP16321/2 is a highly integrated, high-efficiency, fixed frequency, synchronous step-down DC-DC converter in a 16-pin QFN package that operates from input voltages up to 24V. Integrated features include a high-side and low-side N-Channel switch, fixed frequency Peak Current Mode Control, internal compensation, peak current limit, VOUT overvoltage protection and overtemperature protection. Minimal external components are necessary to develop a complete synchronous step-down DC-DC converter power supply.

Features

? Up to 95 Typical Efficiency

? Input Voltage Range: 6.0V to 24V

? 1A Output Current (MCP16321)

? 2A Output Current (MCP16322)

? Fixed Output Voltages: 0.9V, 1.5V, 1.8V, 2.5V,

3.3V, 5V with 2 Output Voltage Accuracy

? Adjustable Version Output Voltage Range:

0.9V to 5V with 1.5 Reference Voltage Accuracy

? Integrated N-Channel High-Side Switch: 180 m?

? Integrated N-Channel Low-Side Switch: 120 m?

? 1 MHz Fixed Frequency

? Low Device Shutdown Current

? Peak Current Mode Control

? Internal Compensation

? Stable with Ceramic Capacitors

? Internal Soft-Start

? Cycle-by-Cycle Peak Current Limit

? Undervoltage Lockout (UVLO): 5.75V

? Overtemperature Protection

? VOUT Overvoltage Protection

? VOUT Voltage Supervisor Reported at the PG Pin

? Available Package: QFN-16 (3x3 mm)

Applications

? PIC?/dsPIC? Microcontroller Bias Supply

? 12V Industrial Input DC-DC Conversion

? Set-Top Boxes

? DSL Cable Modems

? Automotive

? Wall Cube Regulation

? SLA Battery Powered Devices

? AC-DC Digital Control Power Source

? Power Meters

? Consumer

? Medical and Health Care

? Distributed Power Supplies