D-16

D-8

DBV-5

1

FEATURES

APPLICATIONS

EN1

EN3

EN

†

EN2

NC

OC3

NC

OUT3

TPS2047B

DPACKAGE

(TOP VIEW)

NC

GND

GND

GND

GND

IN

OUT

IN1

IN2

TPS2045B/TPS2055B

DPACKAGE

(TOP VIEW)

TPS2045B/TPS2055B

DBVPACKAGE

(TOP VIEW)

OC

OUT

OUT

OC

Allenableinputsareactivehigh

fortheTPS2055B.

†

(EN)

NC-NoConnection

OC1

OC2

OUT1

OUT2

EN1

IN

EN2

GND

IN

TPS2046B

DPACKAGE

(TOP VIEW)

OC1

OC2

EN

†

OUT1

OUT2

IN

OUT

DESCRIPTION

TPS2045B, TPS2055B

TPS2046B, TPS2047B

SLVS532C – JULY 2004 – REVISED OCTOBER 2007

www.ti.com

CURRENT-LIMITED, POWER-DISTRIBUTION SWITCHES

• Heavy Capacitive Loads

• 70-mΩ High-Side MOSFET

• Short-Circuit Protections

• 250-mA Continuous Current

• Thermal and Short-Circuit Protection

• Accurate Current Limit (0.3 A min, 0.7 A max)

• Operating Range: 2.7 V to 5.5 V

• 0.6-ms Typical Rise Time

• Undervoltage Lockout

• Deglitched Fault Report (OC)

• No OC Glitch During Power Up

• Maximum Standby Supply Current:

1-

μA (Single and Dual) or 2-μA (Triple)

• Bidirectional Switch

• Ambient Temperature Range: –40°C to 85°C

• ESD Protection

• UL Pending

The TPS204xB/TPS2055B power-distribution switches are intended for applications where heavy capacitive

loads and short circuits are likely to be encountered. These devices incorporate 70-m

Ω N-channel MOSFET

power switches for power-distribution systems that require multiple power switches in a single package. Each

switch is controlled by a logic-enable input. Gate drive is provided by an internal charge pump designed to

control 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 device limits 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 that the switch remains

off until valid input voltage is present. This power-distribution switch is designed to set current limit at 0.5 A

typically.

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.

UNLESS

OTHERWISE

NOTED

this

document

contains

Copyright © 2004–2007, Texas Instruments Incorporated

PRODUCTION DATA information 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.