3A Bus Terminator Regulator
AP1127

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.1.1 Jan 17, 2005
1/4
„ Features

- Ideal for DDR-I and DDR-II
- Source and sink up to 3A, no heat sink required
- Integrated power MOSFETs
- Programmable output voltage by external resistors
- Output voltage could go down to 0.6V
- Iccq at VCCA less than 500uA
- Current limit protection and Short Circuit
protection
- Thermal shutdown protection
- Shutdown for standby or suspend mode operation
- Minimum external components
- 5-Lead TO252 Pb-free Package


„ Applications

- Mother Board
- PCI/AGP Graphics
- Game/Play Station
- Set Top Box
- SCSI-III Bus Terminator
- IPC

„ General Description

The AP1127 is a low cost linear regulator designed
to provide a desired output voltage or termination
voltage for various applications by converting
voltage supplies ranging from 1.6V to 6.0V. The
desired output voltage could be programmable by
two external voltage divider resistors.

The AP1127 is capable of sourcing or sinking up to
3A of current while regulating an output V
OUT

voltage to within 2% (DDR-I), 3%(DDR-II) or less.

The AP1127 provides low profile 5-lead TO-252
package to save system space.









„ Pin Assignment


5
3
1V
IN
V
OUT
GND
TO252-5L
( Top View )
2
4
VCCA
REFEN


„ Pin Descriptions


Pin
Name
Pin
No.
Descriptions
V
IN
1 Input Power
V
OUT
2 Output Voltage
GND 3 Ground
REFEN 4
Reference Voltage Input and Chip
Enable
VCCA 5 Voltage Supply for Internal Circuits



„ Ordering Information
AP1127 X X
Package
D: TO252-5L
Packing
Blank : Tube
A : Taping