TPS2044, TPS2054

QUAD POWER-DISTRIBUTION SWITCHES

SLVS174B – JULY 1998 – REVISED FEBRUARY 1999

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POST OFFICE BOX 655303

MOSFET Switch

Overcurrent Logic Output

Machine-Model ESD Protection

description

The TPS2044 and TPS2054 quad power-

distribution switches are intended for applications

where heavy capacitive loads and short circuits

are likely to be encountered. The TPS2044 and the TPS2054 incorporate in single packages four 135-m

Ω

N-channel MOSFET high-side power switches for power-distribution systems that require multiple power

switches. Each switch is controlled by a logic enable that is compatible with 5-V logic 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, requiring no external components, 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 TPS2044 and TPS2054 limit

the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) 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 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 TPS2044 and TPS2054 are designed to limit at 0.9-A load. These power-distribution switches are available

in 16-pin small-outline integrated-circuit (SOIC) packages 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)†

–40

°C to 85°C

Active low

0.5

0.9

TPS2044D

–40

°C to 85°C

Active high

0.5

0.9

TPS2054D

† The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2044DR)

Copyright

© 1999, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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.

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GND1

IN1

EN1

EN2

GND2

IN2

EN3

EN4

OC1

OUT1

OUT2

OC2

OC3

OUT3

OUT4

OC4

TPS2044

D PACKAGE

(TOP VIEW)

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GND1

IN1

EN1

EN2

GND2

IN2

EN3

EN4

OC1

OUT1

OUT2

OC2

OC3

OUT3

OUT4

OC4

TPS2054

D PACKAGE

(TOP VIEW)