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FAN5067

ACPI Dual Switch Controller

Fairchild Semiconductor 

FAN5067

Pin Assignments

QCAP

1

16

VCCP

PUMP

2

15

5VMAIN

5VSTBY

3

14

VADJOUT

DUALOUT1

DUALOUT2

4

5

13

FAN5067 12

VADJ

VADJFB

DUALVFB

6

11

GND

SLP_S3

7

10

SS

SLP_S5

8

9

PWR_OK

PRODUCT SPECIFICATION

Pin Definitions

Pin Number Pin Name

1

QCAP

2

PUMP

3

5VSTBY

4

DUALOUT1

5

DUALOUT2

6

DUALFB

7

SLP_S3

8

SLP_S5

9

PWR_OK

10

SS

11

GND

12

VADJFB

13

VADJ

14

VADJOUT

15

5VMAIN

16

VCCP

Pin Function Description

Charge pump cap. Attach flying capacitor between this pin and PUMP to

generate high voltage from standby power.

Charge pump switcher.

5V Standby. Apply +5V standby on this pin to run the circuit in standby mode.

Dual output main gate control. Attach this pin to a transistor powering 3.3V or

5V dual from the main supply.

Dual output standby gate control. Attach this pin to a transistor powering 3.3V

or 5V dual from the 5V standby supply.

Dual output voltage Feedback. Pin 6 is used as the input for the voltage

feedback control loop for 3.3V or 5V dual.

SLP_S3. Control signal governing the Soft Off state S3. Internal current source

pulls this line high if left open.

SLP_S5. Control signal governing the Soft Off state S5. Internal current source

pulls this line high if left open.

PWR_OK. Control signal for switches. Internal current source pulls this line high if

left open.

Softstart. Attach a capacitor to this pin to determine the softstart rate.

Ground. Connect this pin to ground.

Adjustable Dual Voltage Feedback. Pin 12 is used as the input for the voltage

feedback loop for the adjustable dual voltage.

Adjustable Dual Voltage. Pin 13 sources VADJ during standby.

Adjustable Dual Voltage Base Control. Attach this pin to an NPN transistor

powering VADJ from the 5V Main.

5V Main. Apply +5V Main on this pin to run the VADJ base drive.

Main Power. Apply +12V through a diode on this pin to run the circuit in normal

mode. Bypass with a 0.1µF capacitor. When 12V is not present, this pin produces

voltage doubled 5V standby.

2

REV. 1.0.1 5/2/02

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