3

www.fairchildsemi.com

FDMF6704A Rev. F

Pin Description

Absolute Maximum Rating

Recommended Operating Range

* May be operated at lower input voltage. See figure 10.

Pin

Name

Function

1

SMOD#

When SMOD# = HI, low side driver is inverse of PWM input. When SMOD# = Low, low

side driver is disabled. This pin has no internal pullup or pulldown. It should not be left

floating. Do not add noise filter cap.

2

VCIN

IC bias supply. Minimum 1 F ceramic capacitor is recommended from this pin to CGND.

3

VDRV

Power for low side driver. Minimum 1 F ceramic capacitor is recommended to be

connected as close as possible from this pin to CGND.

4

BOOT

Bootstrap supply input. Provides voltage supply to high-side MOSFET driver. Connect

bootstrap capacitor from this pin to PHASE.

5, 37, 41

CGND

IC ground. Ground return for driver IC.

6

GH

For manufacturing test only. This pin must be floated. Must not be connected to any pin.

7

PHASE

Switch node pin for easy bootstrap capacitor routing. Electrically shorted to VSWH pin.

8, 38

NC

No connect.

9-14, 42

VIN

Power input. Output stage supply voltage.

15, 29-35, 43

VSWH, PHASE

Switch node input. Provides return for high-side bootstrapped driver and acts as a

sense point for the adaptive shoot-thru protection.

16-28

PGND

Power ground. Output stage ground. Source pin of low side MOSFET(s).

36

GL

For manufacturing test only. This pin must be floated. Must not be connected to any pin.

39

DISB#

Output disable. When low, this pin disable FET switching (GH and GL are held low). This

pin has no internal pullup or pulldown. It should not be left floating. Do not add noise filter

cap.

40

PWM

PWM Signal Input. This pin accepts a logic-level PWM signal from the controller. This pin

has no internal pullup or pulldown. It should not be left floating. Do not add noise filter cap.

Parameter

Min

Max

Units

VCIN, VDRV, DISB#, PWM, SMOD#, GL to CGND

6

V

VIN to PGND, CGND

27

V

BOOT, GH to VSWH, PHASE

6

V

BOOT, VSWH, PHASE, GH to GND

27

V

BOOT to VDRV

22

V

35

A

32

A

80

A

Junction to PCB Thermal Resistance

3.75

°C/W

Operating and Storage Junction Temperature Range

-55

150

°C

Parameter

Min

Typ

Max

Units

Control Circuit Supply Voltage

4.5

5

5.5

V

Output Stage Supply Voltage

12

14

V