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reference designRT6255B | Demoboard RT6255BHGJ8F

Richtek RT6255B | Demoboard RT6255BHGJ8F

5A, 18V, 500kHz, ACOT™ Step-Down Converter

Overview

TopologyBuck Converter
Input voltage4.5-18 V
Output 15 V / 5 A
IC revision1.0

Description

RT6255BHGJ8FEvaluation Board5A, 18V, 500kHz, ACOT™ Step-Down ConverterThe RT6255B is a synchronous step-down converter with Advanced Constant On-Time (ACOT™) mode control.with the input voltage range from 4.5V to 18V and provides 5A output current. This document explains the functionand use of the RT6255B evaluation board (EVB), and provides information to enable operation, modification of theevaluation board and circuit to suit individual requirements.EVB_RT6255BHGJ8F-00 April 2018

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-ESR Ceramic Output Capacitors
  • Programmable Output Voltage : 0.6V to 5V
  • Internal 45mΩ Switch and 23mΩ Synchronous Rectifier
  • Cycle-by-cycle Current Limit Protection
  • Internal Soft-Start (Typ 1.5ms) or Externally Adjustable, Pre-biased Compatible Soft-Start (Only for Option with SS Pin)
  • Power Good Indicator (90%) (Only for Option with PGOOD Pin)
  • Output Under-Voltage Protection (UVP)
  • Over-Temperature Protection (OTP)
  • Input Under-Voltage Lockout (UVLO)
  • Available in TSOT-23-6 (FC) and TSOT-23-8 (FC) Packages

Typical applications

  • Set Top Box/ Portable TV/ Access Point Router/ DSL Modem/ LCD TV

More information

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7447714047
SPECWE-PD SMT Power Inductor, 4.7 µH, 8 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance4.7 µH
Saturation Current8 A
DC Resistance12.4 mΩ
Self Resonant Frequency34 MHz
Size1050 
VersionPerformance 
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