TPS2836, TPS2837

SYNCHRONOUS-BUCK MOSFET DRIVER

WITH DEADTIME CONTROL

SLVS224 – NOVEMBER 1999

2

POST OFFICE BOX 655303

functional block diagram

DT

3

IN

VCC

LOWDR

BOOTLO

HIGHDR

BOOT

PGND

1

4

8

7

6

5

VCC

2

(TPS2836 Only)

(TPS2837 Only)

200 k

Ω

200 k

Ω

200 k

Ω

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

BOOT

8

I

Bootstrap terminal. A ceramic capacitor is connected between BOOT and BOOTLO to develop the floating

bootstrap voltage for the high-side MOSFET. The capacitor value is typically between 0.1

µF and 1 µF.

BOOTLO

6

O

This terminal connects to the junction of the high-side and low-side MOSFETs.

DT

3

I

Deadtime control terminal. Connect DT to the junction of the high-side and low-side MOSFETs

HIGHDR

7

O

Output drive for the high-side power MOSFET

IN

1

I

Input signal to the MOSFET drivers (noninverting input for the TPS2836; inverting input for the TPS2837).

LOWDR

5

O

Output drive for the low-side power MOSFET

PGND

2

Power ground. Connect to the FET power ground.

VCC

4

I

Input supply. Recommended that a 1

µF capacitor be connected from VCC to PGND.