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MCP1612

Microchip Technology
Part Number MCP1612
Manufacturer Microchip Technology
Description 1.4 MHz Synchronous Buck Regulator
Published Jan 9, 2009
Detailed Description MCP1612 Single 1A, 1.4 MHz Synchronous Buck Regulator Features • • • • www.DataSheet4U.com • • • • • • • • • Fixed Switc...
Datasheet PDF File MCP1612 PDF File

MCP1612
MCP1612

Overview
MCP1612 Single 1A, 1.
4 MHz Synchronous Buck Regulator Features • • • • www.
DataSheet4U.
com • • • • • • • • • 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 µ A (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 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.
The output voltage of the MCP1612 is easily set over the range of 0.
8V to 5.
0V by using an external resistor divider.
The external inductor and output capacitor size are minimized due to an internally-fixed, 1.
4 MHz clock being used to set the switching frequency.
The fixed clock allows for continuous, fixed-frequency PWM operation over the full load range.
The MCP1612 is designed to provide fast dynamic response to sudden changes in input voltage and load current to minimize the necessary amount of external output capacitance.
The MCP1612 can be used with ceramic, tantalum or aluminum electrolytic output capacitors.
Ceramic capacitors with values as low as 4.
7 µF can be used to keep the output ripple voltage low.
For applications that require better load step performance, the value of the output capacitor can be increased to 47 µF.
Additional fe...


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