RT2568

®

DS2568-01 March 2015

www.richtek.com

1

©

Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DDR Termination Regulator

Applications

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Notebook/Desktop/Server

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Telecom/Datacom, GSM Base Station, LCD-TV/PDP-

TV, Copier/Printer, Set-Top Box

General Description

The RT2568 is a sink/source tracking termination regulator.

It is specifically designed for low-cost and low-external

component count systems. The RT2568 possesses a high

speed operating amplifier that provides fast load transient

response and only requires a minimum 10

μF x 3 ceramic

output capacitor. The RT2568 supports remote sensing

functions and all features required to power the DDRIII

and Low Power DDRIII / DDRIV VTT bus termination

according to the JEDEC specification. In addition, the

RT2568 provides an open-drain PGOOD signal to monitor

the output regulation and an EN signal that can be used

to discharge VTT during S3 (suspend to RAM) for DDR

applications.

The RT2568 is available in the thermal efficient package,

WDFN-10L 3x3.

Features

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VIN Input Voltage Range: 1.1V to 3.5V

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VCNTL Input Voltage Range: 2.9V to 5.5V

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Support Ceramic Capacitors

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Power Good Indicator

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10mA Source/Sink Reference Output

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Meet DDRI, DDRII JEDEC Spec

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Support DDRIII, Low Power DDRIII/DDRIV VTT

Applications

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Soft-Start Function

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UVLO and OCP Protection

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Thermal Shutdown

Marking Information

Simplified Application Circuit

RT2568

REFIN

VIN

SENSE

PGND

VCNTL

PGOOD

GND

REFOUT

EN

VOUT

C2

R1

C1

C3

REFOUT

R3

C4

R2

C5

VCNTL

Power Good Indicator

EN

5W=YM

DNN

5W= : Product Code

YMDNN : Date Code