RT9089A Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – DDR Termination Regulator

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RT9089A
DDR Termination Regulator
General Description
The RT9089A is a sink/source tracking termination
regulator. It is specifically designed for low-cost and low-
external component count systems. The RT9089A
possesses a high speed operating amplifier that provides
fast load transient response and only requires a minimum
10μF ceramic output capacitor. The RT9089A supports
remote sensing functions and all features required to power
the DDRI / DDRII / DDRIII and Low Power DDRIII / DDRIV
VTT bus termination according to the JEDEC
specification.
The RT9089A is available in the thermal efficient package,
WDFN-10L 2x2.
Marking Information
2N : Product Code
2NW
W : Date Code
Pin Configurations
(TOP VIEW)
VDDQSNS 1
VIN 2
VOUT 3
PGND 4
SENSE 5
10 VCNTL
9 S5
8 GND
11
7 S3
6 REFOUT
WDFN-10L 2x2
Features
 VIN Input Voltage Range : 1.1V to 3.5V
 VCNTL Input Voltage Range : 2.9V to 5.5V
 Support Ceramic Capacitors
 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
Ordering Information
RT9089A
Package Type
QW : WDFN-10L 2x2 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
 RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
 Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
V_IN
REFOUT
C3
C3
S3
RT9089A
VIN
VCNTL
VDDQSNS
REFOUT
S5
VOUT
SENSE
S3
PGND
GND
VCNTL
C4
S5
V_OUT
C5
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS9089A-02 April 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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