Sample &
Buy
Reference
Design
®
RT2568
DDR Termination Regulator
General Description
Features
VIN Input Voltage Range : 1.1V to 3.5V
VCNTL Input Voltage Range : 2.9V to 5.5V
Support Ceramic Capacitors
Power Good Indicator
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 10μF 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 PGOODsignal to monitor
the output regulation and an EN signal that can be used
to discharge VTT during S3 (suspend to RAM) for DDR
applications.
10mA Source/Sink Reference Output
Meet DDRI, DDRII JEDEC Spec
Support DDRI, DDRII, DDRIII and Low Power DDRIII/
DDRIV VTT Applications
Soft-Start Function
UVLO and OCP Protection
Thermal Shutdown
Applications
Notebook/Desktop/Server
The RT2568 is available in the thermal efficient package,
WDFN-10L 3x3.
Telecom/Datacom, GSM Base Station, LCD-TV/PDP-
TV, Copier/Printer, Set-Top Box
Simplified Application Circuit
RT2568
V
IN
VCNTL
VCNTL
VIN
C5
C6
R1
R3
REFIN
C1
C2
Power Good Indicator
PGOOD
C3
R2
V
VOUT
OUT
SENSE
C8
C7
REFOUT
REFOUT
EN
PGND
GND
C4
Chip Enable
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS2568-05 February 2019
www.richtek.com
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