TPS2041, TPS2051

POWER-DISTRIBUTION SWITCHES

SLVS172A –AUGUST 1998 – REVISED APRIL 1999

1

POST OFFICE BOX 655303

MOSFET Switch

Overcurrent Logic Output

Machine-Model ESD Protection

description

The TPS2041 and TPS2051 power distribution switches are intended for applications where heavy capacitive

loads and short circuits are likely to be encountered. The TPS2041 and the TPS2051 are 135-m

Ω N-channel

MOSFET high-side power switches. Each switch is controlled by a logic enable compatible with 5-V and 3-V

logic. Gate drive is provided by an internal charge pump that controls the power-switch rise times and fall times

to minimize current surges during switching. The charge pump requires no external components and allows

operation from supplies as low as 2.7 V.

When the output load exceeds the current-limit threshold or a short is present, the TPS2041 and TPS2051 limit

the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OC) logic

output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch,

causing the junction temperature to rise, a thermal protection circuit shuts off the switch in overcurrent to prevent

damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal

circuitry ensures the switch remains off until valid input voltage is present.

The TPS2041 and TPS2051 are designed to limit at 0.9-A load. These power distribution switches are available

in 8-pin small-outline integrated circuit (SOIC) and 8-pin plastic dual-in-line packages (PDIP) and operate over

an ambient temperature range of –40

°C to 85°C.

AVAILABLE OPTIONS

RECOMMENDED

MAXIMUM CONTINUOUS

TYPICAL SHORT-CIRCUIT

PACKAGED DEVICES

TA

ENABLE

MAXIMUM CONTINUOUS

LOAD CURRENT

(A)

CURRENT LIMIT AT 25

°C

(A)

SOIC

(D)†

PDIP

(P)

–40

°C to 85°C

Active low

0.5

0.9

TPS2041D

TPS2041P

–40

°C to 85°C

Active high

0.5

0.9

TPS2051D

TPS2051P

† The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2041DR)

Copyright

© 1999, Texas Instruments Incorporated

This document contains information on products in more than one phase

of development. The status of each device is indicated on the page(s)

specifying its electrical characteristics.

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.

1

2

3

4

8

7

6

5

GND

IN

IN

EN

OUT

OUT

OUT

OC

TPS2041

D OR P PACKAGE

(TOP VIEW)

1

2

3

4

8

7

6

5

GND

IN

IN

EN

OUT

OUT

OUT

OC

TPS2051

D OR P PACKAGE

(TOP VIEW)