RT9173PS Richtek Technology Corporation, RT9173PS Datasheet

RT9173PS

Manufacturer Part Number

RT9173PS

Description

SOP8

Manufacturer

Richtek Technology Corporation

Datasheet

1.RT9173PS.pdf (13 pages)

Specifications of RT9173PS

Date_code

09+

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Download datasheet (307Kb)

Peak 3A Bus Termination Regulator

General Description

The RT9173/A regulator is designed to convert voltage

supplies ranging from 1.6V to 6V into a desired output

voltage which adjusted by two external voltage divider

resistors. The regulator is capable of sourcing or sinking

up to

to within 2% (DDR 1) and 3% (DDR 2) or less.

The RT9173/A, used in conjunction with series termination

resistors, provides an excellent voltage source for active

termination schemes of high speed transmission lines as

those seen in high speed memory buses and distributed

backplane designs. The voltage output of the regulator can

be used as a termination voltage for DDR SDRAM.

Current limits in both sourcing and sinking mode, plus on-

chip thermal shutdown make the circuit tolerant of the

output fault conditions.

Ordering Information

Note :

RichTek Pb-free and Green products are :

DS9173/A-18 March 2007

RT9173/A

RoHS compliant and compatible with the current require-

Suitable for use in SnPb or Pb-free soldering processes.

100%matte tin (Sn) plating.

ments of IPC/JEDEC J-STD-020.

3A of peak current while

Package Type

M5 : TO-263-5

L5 : TO-252-5

S : SOP-8

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

3A Sink & Source

1.5A Sink & Source

cial Standard)

regulating an output voltage

Features

Applications

Pin Configurations

Support Both DDR 1 (1.25V

(0.9V

SOP-8, TO-252-5 and TO-263-5 Packages

Capable of Sourcing and Sinking 3A Peak Current

Current-limiting Protection

Thermal Protection

Integrated Power MOSFETs

Generates Termination Voltages for SSTL-2

High Accuracy Output Voltage at Full-Load

Adjustable V

Minimum External Components

Shutdown for Standby or Suspend Mode

Operation with High-impedance Output

RoHS Compliant and 100% Lead (Pb)-Free

DDR Memory Termination

Active Termination Buses

Supply Splitter

) Requirements

REFEN

VOUT

GND

OUT

VIN

TO-263-5 (RT9173A)

TO-252-5 (RT9173A)

by External Resistors

SOP-8 (RT9173)

(TOP VIEW)

) and DDR 2

RT9173/A

VOUT

REFEN

VCNTL (TAB)

GND

VIN

VOUT

REFEN

VCNTL (TAB)

GND

VIN

VCNTL

www.richtek.com

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