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LM5642 - Dual Synchronous Buck Converter

Description

The LM5642 series consists of two current mode synchronous buck regulator controllers operating 180° out of phase with each other at a normal switching frequency of 200kHz for the LM5642 and at 375kHz for the LM5642X.

Features

  • 1.
  • 2 Two Synchronous Buck Regulators.
  • 180° Out of Phase Operation.
  • 200 kHz Fixed Nominal Frequency: LM5642.
  • 375 kHz Fixed Nominal Frequency: LM5642X.
  • Synchronizable Switching Frequency from 150 kHz to 250 kHz for the LM5642 and 200 kHz to 500 kHz for the LM5642X.
  • 4.5V to 36V Input Range.
  • 50 µA Shutdown Current.
  • Adjustable Output from 1.3V to 90% of Vin.
  • 0.04% (Typical) Line and Load Regulation Accuracy.
  • Curr.

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Datasheet preview – LM5642

Datasheet Details

Part number LM5642
Manufacturer Texas Instruments
File Size 1.18 MB
Description Dual Synchronous Buck Converter
Datasheet download datasheet LM5642 Datasheet
Additional preview pages of the LM5642 datasheet.

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Full PDF Text Transcription

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LM5642, LM5642X www.ti.com SNVS219K – JUNE 2003 – REVISED APRIL 2013 LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization Check for Samples: LM5642, LM5642X FEATURES 1 •2 Two Synchronous Buck Regulators • 180° Out of Phase Operation • 200 kHz Fixed Nominal Frequency: LM5642 • 375 kHz Fixed Nominal Frequency: LM5642X • Synchronizable Switching Frequency from 150 kHz to 250 kHz for the LM5642 and 200 kHz to 500 kHz for the LM5642X • 4.5V to 36V Input Range • 50 µA Shutdown Current • Adjustable Output from 1.3V to 90% of Vin • 0.04% (Typical) Line and Load Regulation Accuracy • Current Mode Control with or without a Sense Resistor • Independent Enable/Soft-start Pins Allow Simple Sequential Startup Configuration.
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