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RT9005A

Richtek Technology
Part Number RT9005A
Manufacturer Richtek Technology
Description (RT9005A / RT9005B) DDR VDDQ and Termination Voltage Regulator
Published Jul 10, 2008
Detailed Description Preliminary RT9005A/B DDR VDDQ and Termination Voltage Regulator General Description The RT9005A/B is a dual-output li...
Datasheet PDF File RT9005A PDF File

RT9005A
RT9005A

Overview
Preliminary RT9005A/B DDR VDDQ and Termination Voltage Regulator General Description The RT9005A/B is a dual-output linear regulator for DDRSDRAM 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.
www.
DataSheet4U.
com Features z z z z z z 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 Commercial 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 requirements of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
z 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 z z z z Applications z z z z z z 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 GND 6 9 5 7 VOUT1 GND VOUT2 VREFEN SOP-8 (Exposed Pad) DS9005A/B-01 September 2007 www.
richtek.
com 1 RT9005A/B Typical Application Circuit VIN1 CIN1 2.
2uF CBP 10nF Preliminary VIN2 2 VIN1 1 BP 8 VOUT1 R1 COUT1 2.
2uF RT9005A/B VOUT2 6 COUT2 470uF 3 VIN2 VCNTL 4 CIN2 470uF VCTNL = 3.
3V CVCNTL 47uF RTT VOUT1 2N7002 EN R2 5 VREFEN CS...


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