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A4403 - Valley Current Mode Control Buck Converter

General 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.

Key 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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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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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.