®

DS6203E-00 January 2019

www.richtek.com

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©

Copyright 2019 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

RT6203E

6A, 18V, 700kHz ACOTTM Synchronous Step-Down Converter

with VID Control

General Description

The RT6203E is an adaptive on-time mode synchronous

Buck converter. The main control loop of the RT6203E

uses an adaptive on-time mode control which provides a

very fast transient response with no external components.

The RT6203E operates from 4.5V to 18V VIN input. After

the initial power-up, the output voltage can be changed by

codes sent into the IC via an I2C compatible VID control

bus. There are special codes which can be used to program

current limit level and thermal shutdown level. Shutdown

and startup can be also programmed by special codes.

The device also features an internal soft-start time. Output

voltage is adjustable by VID code setting. VOUT range is

between 0.6V to 1.62V

Features

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VID Control Range Via I

2C Compatible Interface :



0.6V to 0.7V in 20mV Steps

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0.7V to 1.2V in 10mV Steps

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1.2V to 1.62V in 20mV Steps

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Adjustable Current Limit

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Adjustable Thermal Shutdown

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Fast Transient Response

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Steady 700kHz Switching Frequency

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Optimized for All Ceramic Capacitors

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Internal Soft-Start

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Input Under-Voltage Lockout

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Thermal Shutdown

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RoHS Compliant and Halogen Free

Applications

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Industrial and Commercial Low Power Systems

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Computer Peripherals

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LCD Monitors and TVs

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Green Electronics/Appliances

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Point of Load Regulation for High-Performance DSPs,

FPGAs, and ASICs

Simplified Application Circuit

Pin Configuration

(TOP VIEW)

SOP-8 (Exposed Pad)

EN

VOUT

PVCC

SDA

VIN

BOOT

SCL

SW

GND

2

3

4

5

6

7

8

9

RT6203E

VOUT

VIN

BOOT

SW

VOUT

VIN

EN

GND

Enable

PVCC

SCL

SDA

C3

C2

C1

C4

L1

I

2C Control