TPS2330, TPS2331

SINGLE HOT SWAP POWER CONTROLLER WITH

CIRCUIT BREAKER AND POWER-GOOD REPORTING

SLVS277A – MARCH 2000– REVISED APRIL 2000

2

POST OFFICE BOX 655303

functional block diagram

PREREG

UVLO and

Power-Up

IN

ISET

ISENSE

GATE

Clamp

Charge

Pump

75

µA

Pulldown FET

Circuit Breaker

dv/dt Rate

Protection

20-

µs Deglitch

DISCH

Logic

VSENSE

PWRGD

FAULT

TIMER

Circuit

Breaker

VREG

50-

µs Deglitch

AGND

DGND

ENABLE

50

µA

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

AGND

6,9

I

Analog ground, connects to DGND as close as possible

DGND

2

I

Digital ground

DISCH

14

O

Discharge transistor

ENABLE/ ENABLE

13

I

Active low (TPS2330) or active high enable (TPS2331)

FAULT

11

O

Overcurrent fault, open-drain output

GATE

1

O

Connects to gate of high-side MOSFET

IN

8

I

Input voltage

ISENSE

7

I

Current-sense input

ISET

10

I

Adjusts circuit-breaker threshold with resistor connected to IN

PWRGD

12

O

Open-drain output, asserted low when VSENSE voltage is less than reference.

TIMER

3

O

Adjusts circuit-breaker deglitch time

VREG

4

O

Connects to bypass capacitor, for stable operation

VSENSE

5

I

Power-good sense input