Description

The MCP1601 is a fully integrated synchronous BUCK (step down) DC/DC converter for battery powered systems. With an input operating range of 2.7V to 5.5V, the MCP1601 is ideal for applications being powered by one single cell Li-Ion, 2 to 3 cell NiMH, NiCd or alkaline sources. Output voltages can range from 0.9V to VIN to accommodate a wide range of applications. Efficiency can exceed 92% while operating at 750 kHz with load current capability up to 500 mA. The MCP1601 is used to minimize space, cost and wasted energy.

Features

• Input Range of 2.7V to 5.5V

• 3 Operating Modes: PWM, PFM and LDO

• Integrated BUCK and Synchronous Switches

• Ceramic or Electrolytic Input/Output Filtering Capacitors

• 750 kHz Fixed Switching Frequency

• Oscillator Synchronization to 1 MHz PWM Mode

• Auto-Switching from PWM/PFM Operation

• 100% Duty Cycle Capable for Low Input Voltage

• 500 mA Continuous Output Current Capability

• Integrated Under-Voltage Lock-Out Protection

• Integrated Over-Temperature Protection

• Integrated Soft Start Circuitry

• Low Output Voltage Capability to 0.9V

• Temperature Range: -40°C to +85ºC

• Small 8-Pin MSOP Package

Applications

• Low Power Handheld CPUs and DSPs

• Cellular Phones

• Organizers and PDAs

• Digital Cameras

• +5V or +3.3V Distributed Voltages

• USB Powered Devices