TB7004FL

2007-11-13

3

Pin Configuration

Pin Description

Symbol

Pin No.

Description

Notes

CGND

1, 6, 51, Tab

Signal ground for control circuitry

Connect to PGND.

NC

2

No-connect pin

VGIN

3

Power supply for low-side MOSFET gate drive

VCIN

4

Power supply for control circuitry

BOOT

5

Bootstrap capacitor connection

GH

7

High-side MOSFET gate signal

For monitoring purposes

VIN

8 to 20, Tab

Input pins. Connected to an input of the on-chip the DC-DC converter.

VSWH

21, 40 to 50, Tab Output pins. Output inductor connection

PGND

22 to 39

Power ground

GL

52

Low-side MOSFET gate signal

For monitoring purposes

THDN

53

Open-drain output that indicates that thermal shutdown (TSD) has been

tripped. An external pull-up resistor should be added to the THDN pin.

Held Low in thermal shutdown mode.

REG5V

54

Internal 5-V regulator output

DISBL#

55

Disable signal for internal circuitry. Setting DISBL# High enables internal

circuitry. Setting DISBL# Low disables internal circuitry.

Accepts both 5-V and

12-V signals.

PWM

56

3-state enable input

VIN

(Bottom View)

VSWH

CGND

PWM

DISBL#

REG5V

THDN

GL

CGND

VSWH

VSWH

VSWH

VSWH

VSWH

VSWH

VSWH

VSWH

VIN

VIN

VIN

VIN

VIN

VIN

VSWH

PGND

PGND

PGND

PGND

PGND

PGND

PGND

43

44

45

46

47

48

49

50

51

52

53

54

55

56

1

2

3

4

5

6

7

8

9

10 11 12 13 14

42 41 40 39 38 37 36 35 34 33 32 31 30 29

28

27

26

25

24

23

22

21

20

19

18

17

16

15