FAN5063

PRODUCT SPECIFICATION

2

REV. 1.0.0 12/4/00

Pin Assignments

Pin Definitions

Pin Number

Pin Name

Pin Function Description

1

QCAP

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

generate high voltage from standby power.

2

PUMP

Charge pump switcher.

3

5VSTBY

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

4

3VOUT1

3.3V main gate control. Attach this pin to a transistor powering 3.3V dual from

the 3.3V main supply.

5

3VOUT2

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

from the 5V standby supply.

6

3VFB

3.3V voltage Feedback. Pin 6 is used as the input for the voltage feedback

control loop for 3.3V dual.

7

SLP_S3

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

pulls this line high if left open.

8

SLP_S5

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

pulls this line high if left open.

9

PWR_OK

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

left open.

10

SS

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

11

GND

Ground. Connect this pin to ground.

12

VADJFB

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

feedback loop for the adjustable dual voltage.

13

VADJ

Adjustable Dual Voltage. Pin 13 sources VADJ during standby.

14

VADJOUT

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

powering VADJ from the 5V Main.

15

5VMAIN

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

16

VCCP

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.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

FAN5063

QCAP

PUMP

5VSTBY

3VOUT1

3VOUT2

3VFB

SLP_S3

SLP_S5

VCCP

5VMAIN

VADJOUT

VADJ

VADJFB

GND

SS

PWR_OK