Description

The MCP1612 is a 1A, 1.4 MHz, fully-integrated, current mode-controlled, synchronous buck regulator. The MCP1612 is packaged in the 8-pin MSOP and space-saving, 3x3 DFN packages. The DFN package also provides a lower thermal resistance package option for high-power, high ambient temperature applications. With an input operating range from 2.7V to 5.5V, the MCP1612 is ideal for applications that are powered by one single-cell Li-Ion, 2- to 3-cell NiMH, NiCd or alkaline sources.

Features

• Fixed Switching Frequency: 1.4 MHz

• Input Operating Voltage Range: 2.7V to 5.5V

• Integrated Buck and Synchronous Switches

• Adjustable-Output Voltage Range: 0.8V to 5.0V

• 100% Duty Cycle Capable for Low Input Voltage

• Continuous Output Current Capability: 1A

• Shutdown Control with IQ < 0.01 µA (Typ.)

• Integrated Soft-Start Feature

• Integrated Undervoltage Lockout (UVLO) Protection

• Integrated Overtemperature Protection

• Fast Dynamic Response to Line and Load Steps

• Small, 8-Pin DFN and MSOP Packages

• Operating Temperature Range: -40°C to +85°C

Applications

• Network Interface Cards

• Portable Computers

• Set-Top Boxes

• DSL Modems and Routers

• USB-Powered Devices

• GBIC Modules

• High-Speed Data System Bus Termination

• Medical Instruments

• Cellular/GSM/PHS Phones

• +5V or +3.3V Distributed Voltages