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A4491 - Triple Output Step-Down Switching Regulator

General Description

Designed to provide the power supply requirements of printers, office automation, industrial, and portable equipment, the A4491 provides three high current, high performance, switching regulator outputs in a single package, saving space, cost and component count.

Key Features

  • Three buck converters in a single package.
  • 4.5 to 23 V input voltage range.
  • 550 kHz fixed frequency.
  • Multiphase switching for smaller components and lower EMI.
  • Independent control of each converter for sequencing and shutdown control.
  • Power-on-reset flag with adjustable delay.
  • Internal compensation to minimize components and simply design.
  • 4 × 4 mm QFN Package, small PCB footprint.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A4491 Triple Output Step-Down Switching Regulator FEATURES AND BENEFITS ▪ Three buck converters in a single package ▪ 4.5 to 23 V input voltage range ▪ 550 kHz fixed frequency ▪ Multiphase switching for smaller components and lower EMI ▪ Independent control of each converter for sequencing and shutdown control ▪ Power-on-reset flag with adjustable delay ▪ Internal compensation to minimize components and simply design ▪ 4 × 4 mm QFN Package, small PCB footprint PACKAGE: 20-contact QFN (suffix ES) Approximate footprint DESCRIPTION Designed to provide the power supply requirements of printers, office automation, industrial, and portable equipment, the A4491 provides three high current, high performance, switching regulator outputs in a single package, saving space, cost and component count.