TPS2047, TPS2057

TRIPLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES

SLVS194 – APRIL 1999

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POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

features

D 135-mΩ -Maximum (5-V Input) High-Side

MOSFET Switch

D 250 mA Continuous Current per Channel

D Independent Short-Circuit and Thermal

Protection With Overcurrent Logic Output

D Operating Range . . . 2.7-V to 5.5-V

D Logic-Level Enable Input

D 2.5-ms Typical Rise Time

D Undervoltage Lockout

D 20 µA Maximum Standby Supply Current

D Bidirectional Switch

D Available in 16-pin SOIC Package

D Ambient Temperature Range, –40°C to 85°C

D 2-kV Human-Body-Model, 200-V

Machine-Model ESD Protection

typical applications

D Notebook, Desktop and Palmtop PCs

D Monitors, Keyboards, Scanners, and

Printers

D Digital Cameras, Phones, and PBXs

D Hot-Insertion Applications

description

The TPS2047 and TPS2057 triple power-distribution switches are intended for applications where heavy

capacitive loads and short circuits are likely. These devices incorporate in single packages three 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 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, 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 TPS2047 and TPS2057 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 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 TPS2047 and TPS2057 are designed to limit at 0.44-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

TYPICAL SHORT-CIRCUIT

PACKAGED DEVICES

TA

ENABLE

CONTINUOUS LOAD CURRENT

(A)

CURRENT LIMIT AT 25

°C

(A)

SOIC

(D)†

–40

°C to 85°C

Active low

0.25

0.44

TPS2047D

–40

°C to 85°C

Active high

0.25

0.44

TPS2057D

† The D package is available taped and reeled. Add an R suffix to device type (e.g., TPS2047DR)

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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16

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GND1

IN1

EN1

EN2

GND2

IN2

EN3

NC

OC1

OUT1

OUT2

OC2

OC3

OUT3

NC

NC

TPS2047

D PACKAGE

(TOP VIEW)

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16

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9

GND1

IN1

EN1

EN2

GND2

IN2

EN3

NC

OC1

OUT1

OUT2

OC2

OC3

OUT3

NC

NC

TPS2057

D PACKAGE

(TOP VIEW)

NC – No internal connection