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Triple-Output Step-Down Switching Regulator for Industrial and Portable Applications

A4490

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Serving as a replacement part for the A4492 - Triple Output Step-Down Switching Regulator.

The A4490 efficiently powers multiple voltage rails with its three integrated buck converters, independent soft-start, and multiphase switching for reduced EMI. Ideal for industrial and portable equipment.

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Packaging

Typical Applications

  • Three buck converters in a single IC
  • Saves significant PCB space and component count vs single regulators
  • 4.5 to 34 V input voltage range
  • 550 kHz fixed frequency – stable with ceramic output capacitors
  • Multiphase switching reduces EMI and input supply stress
  • Independent control of each converter simplifies power sequencing
  • Power-on-reset flag with adjustable delay
  • Internal compensation
  • 4 × 4 mm QFN Package, small PCB footprint

The A4490 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm nominal overall height QFN, with exposed pad for enhanced thermal dissipation (suffix ES). It is lead (Pb) free, with 100% matte tin leadframe plating.

ES Package Documentation

  • Photo, Inkjet, and Portable Printers
  • Industrial
  • Hand-Held Devices
  • Portable Applications
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Documentation

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