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 mΩ

• Integrated N-Channel Low-Side Switch: 120 mΩ

• 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