A4491 Datasheet Triple Output Step-Down Switching Regulator

Manufacturer: Allegro MicroSystems

A4491 triple output step-down switching regulator by Allegro MicroSystems - Datasheet Preview

Datasheet Details

Part number	A4491
Manufacturer	Allegro MicroSystems
File Size	1.08 MB
Description	Triple Output Step-Down Switching Regulator
Datasheet	A4491 Datasheet

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.

High frequency switching allows selection of inexpensive inductors and small ceramic output capacitors.

The turn-on cycles of the regulators are interleaved to minimize stresses on the input capacitors and to reduce EMI.

Overview

A4491 Triple Output Step-Down Switching Regulator.

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.

More Datasheets from Allegro MicroSystems

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