3A Bus Terminator Regulator

AP1128

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev.1.0 Jul 20, 2005

1/7

Features

- Ideal for DDR-I and DDR-II applications

- Capable of sourcing and sinking current 1.5A/3A

- Current limiting protection

- Thermal protection

- Current-shoot-through protection

- High accuracy output voltage at full load

- Minimum external components

- Adjustable VOUT by external resistors

- Shutdown for standby or suspend mode operation

with high-impedance output

- TO252-5 and SOP-8 Pb-free Package

Applications

- Mother Board DDR-SDRAM Termination

- Mother Board DDR-II Termination

- Game / Play Station

- Set Top Box

- PCI / AGP Graphics

- IPC

- SCSI-III Bus Termination

General Description

AP1128 is a linear regulator designed as a

cost-effective solution for active termination of DDR

SDRAM. The converting voltage range is from 1.6V

to 6V into a desired output voltage, which is

adjusted by two external resistors. The current

sourcing and sinking capability of the regulator is up

to 1.5A/3A while the output voltage within 2%/3%.

This device provides on-chip thermal shutdown and

current limit functions for circuit tolerance of the

output fault conditions. SO-8 and TO-252-5L

packages are available for all commercial and

industrial surface mount applications.

Pin Assignment

5

3

1V

IN

V

OUT

GND

TO252-5L

( Top View )

2

4

V

CNTL(TAB)

V

REFEN

1

2

3

7

6

5

4

8

(Top View)

V

CNTL

V

CNTL

V

CNTL

V

CNTL

V

IN

GND

V

REFEN

SOP-8L

V

OUT

Pin Descriptions

Pin Name

Descriptions

Power Input

Gate Drive Voltage

Reference Voltage Input and Chip

Enable

GND

Ground

Output Voltage