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A4403 - Valley Current Mode Control Buck Converter

Description

The A4403 is a buck converter that uses valley current-mode control.

This control scheme allows very short switch on-times to be achieved, making it ideal for applications that require high switching frequencies combined with high input voltages and low output voltages.

Features

  • Extremely fast load-transient response with minimal output voltage delta.
  • Achieves high step-down ratios with on-times < 50 ns.
  • User-configurable on-time, achieving switching frequencies up to 2 MHz.
  • Minimal external components required.
  • Optimized for low value filter capacitors and inductors.
  • Wide input voltage range: 9 to 46 V.
  • Output Current: 3 A.
  • Low standby current.

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Datasheet preview – A4403

Datasheet Details

Part number A4403
Manufacturer Allegro
File Size 1.00 MB
Description Valley Current Mode Control Buck Converter
Datasheet download datasheet A4403 Datasheet
Additional preview pages of the A4403 datasheet.

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Full PDF Text Transcription

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A4403 Valley Current Mode Control Buck Converter FEATURES AND BENEFITS ▪ Extremely fast load-transient response with minimal output voltage delta ▪ Achieves high step-down ratios with on-times < 50 ns ▪ User-configurable on-time, achieving switching frequencies up to 2 MHz ▪ Minimal external components required ▪ Optimized for low value filter capacitors and inductors ▪ Wide input voltage range: 9 to 46 V ▪ Output Current: 3 A ▪ Low standby current <100 μA ▪ Supplied in thermally enhanced QFN package APPLICATIONS: ▪ Printers, scanners ▪ Cable, DSL modems/routers ▪ Network and telecom ▪ Industrial control ▪ Distributed power systems ▪ Set top box ▪ High power LED supply ▪ Battery chargers ▪ GPS / Infotainment PACKAGE 16-contact QFN (suffix EU): 4 mm × 4 mm × 0.
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