TPPM0302

400-mA LOW-DROPOUT REGULATOR

WITH AUXILIARY POWER MANAGEMENT AND POK

SLVS316 – NOVEMBER 2000

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POST OFFICE BOX 655303

Hysteresis

3.3-V Input Source

Supervisor of 3.3VOUT

Packaging Concept for Efficient Heat

Management

description

The TPPM0302 is a low-dropout regulator with auxiliary power management that provides a constant 3.3-V

supply at the output capable of driving a 400-mA load.

The TPPM0302 provides a regulated power output for systems that have multiple input sources and require a

constant voltage source with a low-dropout voltage. This is a single output, multiple input, intelligent power

source selection device with a low-dropout regulator for either 5VCC or 5VAUX inputs, and a low-resistance

bypass switch for the 3.3VAUX input.

Transitions may occur from one input supply to another without generating a glitch, outside of the specification

range, on the 3.3-V output. The device has an incorporated reverse blocking scheme to prevent excess leakage

from the input terminals in the event that the output voltage is greater than the input voltage. The output voltage

is continually monitored for constant output, and any deviation from the internal set limit (

≈2.8 V) is reported by

a low signal on the POK output.

The input voltage is prioritized in the following order: 5VCC, 5VAUX, and 3.3VAUX.

Copyright

© 2000, 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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DGN PACKAGE

(TOP VIEW)

5VAUX

5VCC

3.3VOUT

3.3VAUX

NC

GND

NC

POK

NC – No connect

PowerPAD is a trademark of Texas Instruments.