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