FAN5230

2

REV. 2.8.5 10/17/01

Pin Assignments

Pin Description

Pin Name

Pin Number Pin Function Description

VIN

1

Input power.

3.3V-ALWAYS

2

3.3V Always on linear regulator. Load current on pins 2 and 6 must not exceed

50mA total. This pin should be decoupled to ground with a 10µF capacitor.

CPUMP3.3

3

Charge Pump 3.3V. High side Gate drive voltage for 3.3V. This pin is to be

connected to SW3.3 through a 100nF cap. and to 5V-ALWAYS through a diode

HSD3.3

4

High-side gate driver for 3.3V. Connect this pin directly to the gate of an

N-channel MOSFET. The trace from this pin to the MOSFET gate should be < 1".

SW3.3

5

High side FET Source and Low Side FET Drain Switching Node. Switching

node for 3.3V.

5V-ALWAYS

6

5V Always on linear regulator output. The sum of the load currents on pins 2

and 6 must not exceed 50mA total. This pin should be decoupled to ground with

a 10µF capacitor.

1

Top View

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

VIN

3.3V-ALWAYS

5V-ALWAYS

CPUMP3.3

HSD3.3

SW3.3

ISEN3.3

LSD3.3

GND3.3

VFB3.3

SDN3.3

PGOOD

CPUMP5

HSD5

SW5

ISEN5

LSD5

GND5

VFB5

SDN5

SW12

VFB12

SGND

SDWN

Typical Application

1 VIN

2 3.3 ALW

3 CPUMP3.3

4 HSD3.3

5 SW3.3

6 5V-ALW

7 LSD3.3

8 GND3.3

9 ISEN3.3

10 VFB3.3

11 SDN3.3

12 PGOOD

CPUMP5 24

HSD5 23

SW5 22

ISEN5 21

LSD5 20

GND5 19

VFB5 18

SDN5 17

SW12 16

VFB12 15

SGND 14

SDWN 13

FAN5230

Vin = 5.4-24V

12V @ 120mA

3.3V-ALWAYS@50mA

5V @ 5A

SDN5

SDWN

PGOOD

3.3V @ 5A

+

SDN3.3

+

+

5V-ALWAYS@ 50mA

5V-ALWAYS

5V-ALWAYS

VFB12