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A4490 Datasheet Triple Output Step-Down Switching Regulator

Manufacturer: Allegro MicroSystems

Overview: A4490 Triple Output Step-Down Switching Regulator.

General Description

Designed to provide the power supply requirements of printers, office automation, industrial, and portable equipment, the A4490 provides three high current, high performance, switching regulator outputs with independent soft start.

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.

Key Features

  • Three buck converters.
  • 4.5 to 34 V input voltage range.
  • 550 kHz fixed frequency.
  • Multiphase switching.
  • Independent control of each converter.
  • Power-on-reset flag.
  • Internal compensation.
  • 4 × 4 mm QFN Package, small PCB footprint Package: 20-contact QFN (suffix ES) Approximate size.