RT9005A Datasheet, PDF (1/10 Pages) Richtek Technology Corporation – DDR VDDQ and Termination Voltage Regulator

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.
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.
Features
z Ideal for DDR-I and DDR-II VDDQ, VTT Applications
z Integrated Power MOSFETs
z Generates Termination Voltage for SSTL_2,
SSTL _18, HSTL, SCSI-2 and SCSI-3 Interfaces
z High Accuracy Output Voltage at Full-Load
z VOUT2 Sink and Source 2A Continuous Current
z VOUT2 Adjustment by Two External Resistors
z Shutdown for Suspend to RAM (STR) Functionality
with High-Impedance Output
z Current Limiting Protection
z On-Chip Thermal Protection
z Available in SOP-8 (Exposed Pad) Packages
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Desktop PCs, Notebooks, and Workstations
z Graphics Card Memory Termination
z Set Top Boxes, Digital TVs, Printers
z Embedded Systems
z Active Termination Buses
z DDR-I and DDR-II Memory Systems
Pin Configurations
(TOP VIEW)
BP
VIN1
VIN2
VCNTL
8
2
7
GND
3
96
4
5
VOUT1
GND
VOUT2
VREFEN
SOP-8 (Exposed Pad)
DS9005A/B-01 September 2007
www.richtek.com
1