Preliminary
RT9005A/B
DDR VDDQ and Termination Voltage Regulator
General Description
The RT9005A/B is
a dual-output linear regulator for DDR-
SDRAM VDDQ supply and termination voltage VTT supply.
The Regulator is capable of actively sinking or sourcing
up to 2A. The output termination voltage can be tightly
regulated to track 1/2 VDDQ by two external voltage divider
resistors.
Features
Ideal for DDR-I and DDR-II VDDQ, VTT Applications
Integrated Power MOSFETs
Generates Termination Voltage for SSTL_2,
SSTL _18, HSTL, SCSI-2 and SCSI-3 Interfaces
High Accuracy Output Voltage at Full-Load
VOUT2 Sink and Source 2A Continuous Current
VOUT2 Adjustment by Two External Resistors
Shutdown for Suspend to RAM (STR) Functionality
with High-Impedance Output
Current Limiting Protection
On-Chip Thermal Protection
Available in SOP-8 (Exposed Pad) Packages
RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9005
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
VOUT1 Output Voltage
A : 2.5V
B : 1.8V
Note :
Richtek Pb-free and Green 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.
100% matte tin (Sn) plating.
Applications
Desktop PCs, Notebooks, and Workstations
Graphics Card Memory Termination
Set Top Boxes, Digital TVs, Printers
Embedded Systems
Active Termination Buses
DDR-I and DDR-II Memory Systems
Pin Configurations
(TOP VIEW)
BP
VIN1
VIN2
VCNTL
2
3
4
8
7
GND
6
9
5
VOUT1
GND
VOUT2
VREFEN
SOP-8 (Exposed Pad)
DS9005A/B-01
September 2007
www.richtek.com
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RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
