DEVICE INFORMATION

PIN ASSIGNMENTS

1

2

3

4

5

6

7

8

BOOT

VIN

EN

SS

PH

GND

COMP

VSENSE

TPS54331

TERMINAL FUNCTIONS

TERMINAL

DESCRIPTION

NAME

NO.

BOOT

1

A 0.1

µF bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor falls below the

minimum requirement, the high-side MOSFET is forced to switch off until the capacitor is refreshed.

VIN

2

Input supply voltage, 3.5 V to 28 V.

EN

3

Enable pin. Pull below 1.25V to disable. Float to enable. Programming the input undervoltage lockout with two

resistors is recommended.

SS

4

Slow start pin. An external capacitor connected to this pin sets the output rise time.

VSENSE

5

Inverting node of the gm error amplifier.

COMP

6

Error amplifier output, and input to the PWM comparator. Connect frequency compensation components to this pin.

GND

7

Ground.

PH

8

The source of the internal high-side power MOSFET.

4

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Product Folder Link(s): TPS54331