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LM5642

Part Number	LM5642
Manufacturer	National Semiconductor
Description	High Voltage/ Dual Synchronous Buck Converter
Published	Mar 22, 2005
Detailed Description	LM5642 High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization September 2003 LM5642 High Voltag...
Datasheet	LM5642 PDF File

Overview

LM5642 High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization September 2003 LM5642 High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization General Description The LM5642 consists of two current mode synchronous buck regulator controllers operating 180˚ out of phase with each other at a normal switching frequency of 200kHz.
Out of phase operation reduces the input ripple RMS current, thereby significantly reducing the required input capacitance.
The switching frequency can be synchronized to an external clock between 150kHz and 250kHz.
The two switching regulator outputs can also be paralleled to operate as a dual-phase single output regulator.
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