RT2568 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – DDR Termination Regulator

®
RT2568
DDR Termination Regulator
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 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 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.
Marking Information
5W= : Product Code
5W=YM
DNN
YMDNN : Date Code
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
 10mA Source/Sink Reference Output
 Meet DDRI, DDRII JEDEC Spec
 Support DDRIII, Low Power DDRIII/DDRIV VTT
Applications
 Soft-Start Function
 UVLO and OCP Protection
 Thermal Shutdown
Applications
 Notebook/Desktop/Server
 Telecom/Datacom, GSM Base Station, LCD-TV/PDP-
TV, Copier/Printer, Set-Top Box
Simplified Application Circuit
V_IN
REFOUT
R1
C1
C3
RT2568
VIN
VCNTL
REFIN
R2 C2
REFOUT
EN
EN
PGOOD
VOUT
SENSE
PGND
GND
R3
C4
C5
VCNTL
Power Good Indicator
V_OUT
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS2568-01 March 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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