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RT6255B - Step-Down Converter

This page provides the datasheet information for the RT6255B, a member of the RT6255A Step-Down Converter family.

Datasheet Summary

Description

The RT6255A/B is a high-performance, synchronous stepdown DC-DC converter that can deliver up to 5A output current from a 4.5V to 18V input supply.

The device integrates low RDS(ON) power MOSFETs, accurate 0.6V reference and an integrated diode of bootstrap circuit to offer a very compact solution.

Features

  • are also integrated in the device including the cycle-by-cycle current limit control, UVP, input UVLO and OTP. The RT6255A/B is available in the TSOT-23-6 (FC) and TSOT-23-8 (FC) package. Features.
  • Input Supply Voltage Range : 4.5V to 18V.
  • Output Current : 5A.
  • Advanced Constant On-Time (ACOTTM) Control for Ultrafast Transient Response.
  • Steady Switching Frequency : 500kHz  Forced PWM Mode (RT6255B)  Pulse-Skipping Mode (PSM) at Light Load (RT6255A).
  • Optimized for Low-E.

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Datasheet preview – RT6255B

Datasheet Details

Part number RT6255B
Manufacturer Richtek
File Size 367.84 KB
Description Step-Down Converter
Datasheet download datasheet RT6255B Datasheet
Additional preview pages of the RT6255B datasheet.

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Full PDF Text Transcription

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Reference Design Sample & Buy ® RT6255A/B 5A, 18V, 500kHz, ACOTTM Step-Down Converter General Description The RT6255A/B is a high-performance, synchronous stepdown DC-DC converter that can deliver up to 5A output current from a 4.5V to 18V input supply. The device integrates low RDS(ON) power MOSFETs, accurate 0.6V reference and an integrated diode of bootstrap circuit to offer a very compact solution. The RT6255A/B adopts Advanced Constant On-Time (ACOTTM) control architecture that provides ultrafast transient response and further reduces the externalcomponent count. In steady states, the ACOTTM operates in nearly constant switching frequency over line, load and output voltage ranges and makes the EMI filter design easier.
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