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RT2855B - Synchronous Step-Down Converter

This page provides the datasheet information for the RT2855B, a member of the RT2855A Synchronous Step-Down Converter family.

Description

The RT2855A/B are high-performance 650kHz 4A stepdown regulators with internal power switches and synchronous rectifiers.

Features

  • a power-saving discontinuous operating mode at light loads. Features.
  • Fast Transient Response.
  • Steady 650kHz Switching Frequency at all Load Current (RT2855B).
  • Discontinuous operating mode at Light Load (RT2855A).
  • 4A Output Current.
  • Advanced Constant On-Time (ACOT®) Control.
  • Optimized for Ceramic Output Capacitors.
  • 4.5V to 18V Input Voltage Range.
  • Internal 70mΩ Switch and 30mΩ Synchronous Rectifier.
  • 0.765V to 7V Adjustable Output Voltage.
  • Externa.

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Datasheet preview – RT2855B

Datasheet Details

Part number RT2855B
Manufacturer Richtek
File Size 275.90 KB
Description Synchronous Step-Down Converter
Datasheet download datasheet RT2855B Datasheet
Additional preview pages of the RT2855B datasheet.

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Full PDF Text Transcription

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® RT2855A/B 4A, 18V, 650kHz, ACOT® Synchronous Step-Down Converter General Description The RT2855A/B are high-performance 650kHz 4A stepdown regulators with internal power switches and synchronous rectifiers. They feature quick transient response using theirAdvanced Constant On-Time (ACOT®) control architecture that provides stable operation with small ceramic output capacitors and without complicated external compensation, among other benefits. The input voltage range is from 4.5V to 18V and the output is adjustable from 0.765V to 7V. The proprietary ACOT®control improves upon other fastresponse constant on-time architectures, achieving nearly constant switching frequency over line, load, and output voltage ranges.
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