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FAN5067

ACPI Dual Switch Controller

Fairchild Semiconductor 

FAN5067

ACPI Dual Switch Controller

www.fairchildsemi.com

Features

• Implements ACPI control with PWROK, SLP_S3 and

SLP_S5

• Switch and linear regulator controller for 3.3V or 5V Dual

• Linear regulator controller and linear regulator for VADJ

Dual output adjustable from 2.5V to 3.5V

• Break-before-Make

• Drives all N-Channel MOSFETs plus NPN

• Latched overcurrent protection for outputs

• Power-up softstarts for the linear regulators

• UVLO guarantees correct operation for all conditions

• 16 pin SOIC package

Description

The FAN5067 is an ACPI Switch Controller for Pentium IV

Platforms. It is controlled by PWROK, SLP_S3 and SLP_S5,

and provides 3.3V or 5V Dual and VADJ Dual output for

SDRAM or DDR with 200mA minimum base current for an

external NPN transistor. An on-board precision low TC

reference achieves tight tolerance voltage regulation without

expensive external components. The FAN5067 also offers

integrated Current Limiting that protects each output, and

softstart for the linear regulators. The FAN5067 is available in

a 16 pin SOIC.

Applications

• Willamette Platform ACPI Controller

• Northnwood Platform ACPI Controller

Block Diagram

PWR_OK SLP_S3 SLP_S5

9

7

8

+5V Standby

+12V

31

2 16

10 Softstart

Osc

+5V Main

15

14

13

VADJ Dual

(SDRAM or DDR)

12

Over Current

+ REF

-

-

REF +

11

-

+

+

REF

-

Main

4

+5V Standby

5

6

+3.3V or 5V Dual

REV. 1.0.1 5/2/02

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