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MCP1601

Microchip Technology
Part Number MCP1601
Manufacturer Microchip Technology
Description 500mA Synchronous BUCK Regulator
Published Oct 24, 2007
Detailed Description MCP1601 500 mA Synchronous BUCK Regulator Features • Input Range of 2.7V to 5.5V • 3 Operating Modes: PWM, PFM and LDO ...
Datasheet PDF File MCP1601 PDF File

MCP1601
MCP1601

Overview
MCP1601 500 mA Synchronous BUCK Regulator 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 Package Type 8-Pin MSOP VIN SHDN FB AGND 1 8 2 7 MCP1601 3 6 4 5 LX PGND VOUT SYNC/PWM 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.
The PWM mode switching frequency is internally set to a fixed 750 kHz allowing the use of low profile, surface mount inductors and ceramic capacitors while maintaining a typical efficiency of 92%.
The MCP1601 is capable of three distinct operating modes: PWM, PFM and Low Drop Out.
When operating in PWM (pulse width modulation) mode, the DC/DC converter switches at a single high frequency determined by either the internal 750 kHz oscillator or external synchronization frequency.
For applications that operate at very light to no l...


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