RT9199

1

DS9199-07

September 2007

www.richtek.com

Pin Configurations

Cost-Effective, 2A Peak Sink/Source Bus Termination Regulator

Ordering Information

General Description

The RT9199 is a simple, cost-effective and high-speed

linear regulator designed to generate termination voltage

in double data rate (DDR) memory system to comply with

the devices requirements. The regulator is capable of

actively sinking or sourcing up to 2A peak while regulating

an output voltage to within 20mV. The output termination

external voltage divider resistors or the desired output

voltage can be pro-grammed by externally forcing the

REFEN pin voltage.

The RT9199 also incorporates a high-speed differential

amplifier to provide ultra-fast response in line/load transient.

Other features include extremely low initial offset voltage,

excellent load regulation, current limiting in bi-directions

and on-chip thermal shut-down protection.

The RT9199 are available in both SOP-8 and SOP-8

(Exposed Pad) surface mount packages.

Features

Sink and Source 2A Peak Current

Integrated Power MOSFETs

Generate Termination Voltage for DDR Memory

Interfaces

High Accuracy Output Voltage at Full-Load

Output Adjustment by Two External Resistors

Low External Component Count

Shutdown for Suspend to RAM (STR) Functionality

with High-Impedance Output

Current Limiting Protection

On-Chip Thermal Protection

RoHS Compliant and 100% Lead (Pb)-Free

Applications

Desktop PCs, Notebooks, and Workstations

Graphics Card Memory Termination

Set Top Boxes, Digital TVs, Printers

Embedded Systems

Active Termination Buses

DDR/II Memory Systems

(TOP VIEW)

SOP-8

SOP-8 (Exposed Pad)

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.

VIN

GND

REFEN

VOUT

VCNTL

2

3

4

5

6

7

8

VCNTL

VCNTL

VCNTL

Package Type

S : SOP-8

SP : SOP-8 (Exposed Pad-Option 2)

RT9199

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

VIN

GND

REFEN

VOUT

NC

NC

NC

VCNTL

GND

2

3

4

5

6

7

8

9