LTCH

GND

CT

IFLT

IMAX

VIN

1

16

6

5

7

8

9

TPS2420

UDG-09017

EN

(A)

15-V

SMAJ15A

(A)

C

VIN

40.2kW

49.9kW

0.1 mF

IMON

VOUT

13

14

15

10

FLT

PG

63.4kW

tosystem

monitor

(A)

C

LOAD

(A)Requiredonlyinsystemswithleadand/orloadinductance.

11

12

2

3

4

VIN

VIN

VIN

VOUT

VOUT

VOUT

3.0Vto20.0V

TPS2420

www.ti.com

SLUS903D

– JANUARY 2009 – REVISED SEPTEMBER 2011

3-V to 20-V INTEGRATED FET HOT SWAP CONTROLLER

Check for Samples: TPS2420

1

FEATURES

DESCRIPTION

The

TPS2420

provides

highly

integrated

load

2

•

Integrated 30-m

Ω Pass MOSFET

protection for 3-V to 20-V applications. The TPS2420

•

3.0-V to 20-V Bus Operation

protects loads, minimizes inrush current, and safely

•

Programmable Fault Current

shuts down in the event of a fault. The programmable

fault current threshold starts the fault timer while

•

Programmable Hard Current Limit

allowing the current to pass to the load uninhibited.

•

Programmable Fault Timer

The programmable current limit threshold sets the

•

Internal MOSFET Power Limiting Foldback

maximum current allowed into the load, for both

inrush and severe load faults. Both events use the

•

Latching and Auto-Retry Operation

programmable timer which inhibits all current to the

•

Analog Current Monitor Output

load when it expires.

•

Powergood Output

The

dual

protection

thresholds

are

useful

in

•

Fault Output Indicator

applications such as disk drives. The start-up and

•

4 mm

× 4 mm QFN

seek currents are typically higher than the nominal

current and during this time the load needs a low

•

–40°C to 125°C Junction Temperature Range

impedance path to deliver the power. If a failure at

•

UL Listed - File Number E169910

the load occurs, the current limit does not allow the

current to exceed the programmed threshold. This

APPLICATIONS

protects both the load and the integrity of the power

supply. The internal MOSFET is protected by power

•

RAID Arrays

limit circuitry which ensures that the MOSFET

•

Telecommunications

remains within its safe operating area (SOA) during

•

Plug-In Circuit Boards

all operating states.

•

Disk Drives

The TPS2420 also allows the system to monitor load

currents with no need for a shunt in the power path.

The gain of the current monitor can be scaled to the

application. Fault and power good outputs are

provided for improved system management and

sequencing control.

This device can be programmed to either latch-off or

retry in the event of a fault. All of this functionality is

packed into a 16-pin 4

× 4 mm QFN package.

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.

2

PowerPad is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2009–2011, 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.