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