1

2

3

4

EN

PROG

TIMER

GND

12

11

10

9

VCC

SENSE

GATE

FFLTb

Thermal

Pad

RGT Package

(Top View)

PINOUT

TYPICAL APPLICATION (12 V at 10 A)

TPS24720

R

2 m

SENSE

M

CSD16403Q5

1

C

T

56 nF

VCC

OUT

GATE

SENSE

PGb

PROG

TIMER

GND

OV

EN

R

2.94

2

k

R

90.9 k

1

R

3

10 k

R

5

3.01 k

LATCH

IMON

R

4

3.01 k

FLTb

FFLTb

R

6

3.01 k

ENSD

SET

R

SET

51.1

R

PROG

53.6 k

R

IMON

1.43 k

V

UVLO

OV

LMT

FAULT

= 10.83 V

V

= 14.02 V

I

= 12 A

t

= 7.56 ms

C

1

0.1 F

R

7

C

OUT

470 F

V

IN

V

OUT

3 V

R

GATE

10

TPS24720

www.ti.com

SLVSAL1B

– MARCH 2011 – REVISED MAY 2011

2.5-V to 18-V High-Efficiency Adjustable Power-Limiting Hot-Swap Controller With Current

Monitor and Overvoltage Protection

Check for Samples: TPS24720

1

FEATURES

APPLICATIONS

•

2.5-V to 18-V Operation

•

Server Backplanes

•

Accurate Current Limiting for Startup

•

Storage Area Networks (SAN)

•

Programmable FET SOA Protection

•

Telecommunications Mezzanine Cards

•

Adjustable Current Sense Threshold

•

Medical Systems

•

Programmable Fault Timer

•

Plug-In Modules

•

Power-Good Output

•

Base Stations

•

Fast Breaker for Short-Circuit Protection

•

Analog Load-Current Monitor Output

•

Programmable UV and OV

•

Low-current Standby Mode

•

FET Fault Detection Flag

•

3-mm

× 3-mm, 16-Pin QFN package

DESCRIPTION

The TPS24720 is an easy-to-use, full-featured protection device for 2.5-V to 18-V power rails. This hot-swap

controller drives an external N-channel MOSFET, while protecting source, load and external MOSFET against

multiple potentially damaging events. During startup, load current and MOSFET power dissipation are limited to

user-selected values. After startup, currents above the user-selected limit will be allowed to flow until

programmed timeout

– except in extreme overload events when load is immediately disconnected from source.

Programmable power limiting ensures the external MOSFET operates inside its safe operating area (SOA) at all

times. This allows use of smaller FETs while improving system reliability. Power good, Fault, FET Fault, and

current monitor outputs are provided for system status monitoring and downstream load control.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.