www.fairchildsemi.com
FAN5067
ACPI Dual Switch Controller
Features
Description
• 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
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
+12V
+5V Standby
PWR_OK
9
10
SLP_S3
SLP_S5
3
8
7
Softstart
1
2
16
Osc
+5V Main
15
Over Current
Main
4
14
+5V Standby
+
VADJ Dual
(SDRAM or DDR)
13
+
-
+
-
REF
12
REF
+
5
REF
6
+3.3V or 5V Dual
11
REV. 1.0.1 5/2/02