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FEATURES

PORTABLE APPLICATIONS

DBV (SOT-23) PACKAGE

(TOP VIEW)

1

2

3

5

4

GND

ON/OFF

NC

NC − No connect; must be left open

DESCRIPTION/ORDERING INFORMATION

LP2981-29

,, LP2981-50,, LP2981A-29,, LP2981A-50

100-mA ULTRA-LOW DROPOUT REGULATOR

WITH SHUTDOWN

SLVS768 – MARCH 2007

• Mobile Phones

• Output Tolerance of

• Laptops

–

0.75% (A Grade)

• Personal Digital Assistants (PDAs)

–

1.25% (Standard Grade)

• Digital Cameras and Camcorders

• Ultra-Low Dropout, Typically

• CD and MP3 Players

–

200 mV at Full Load of 100 mA

–

7 mV at 1 mA

• Wide V

• Low I

• Shutdown Current…0.01 µA Typ

• Fast Transient Response to Line and Load

• Overcurrent and Thermal Protection

• High Peak Current Capability

The LP2981 family of fixed-output, low-dropout regulators offers exceptional, cost-effective performance for both

portable and nonportable applications. Available in fixed voltages of 2.9 V and 5 V, the family has an output

tolerance of 0.75% for the A-grade devices (1.25% for the standard grade) and is capable of delivering 100-mA

continuous load current. Standard regulator features, such as overcurrent and overtemperature protection, are

included.

The LP2981 has features that make the regulator an ideal candidate for a variety of portable applications:

• Low dropout: A PNP pass element allows a typical dropout of 200 mV at 100-mA load current and 7 mV at

1-mA load.

• Low quiescent current: The use of a vertical PNP process allows for quiescent currents that are considerably

lower than those associated with traditional lateral PNP regulators.

• Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01 µA when the

ON/OFF pin is pulled low.

• Small packaging: For the most space-constrained needs, the regulator is available in the SOT-23 package.

ORDERABLE

TOP-SIDE

PART GRADE

(NOM)

PART NUMBER

Reel of 3000

LP2981A-29DBVR

2.9 V

SOT-23-5 – DBV

LRB_

Reel of 250

LP2981A-29DBVT

A grade:

0.75% tolerance

Reel of 3000

LP2981A-50DBVR

5 V

SOT-23-5 – DBV

LPE_

Reel of 250

LP2981A-50DBVT

–40

°C to 125°C

Reel of 3000

LP2981-29DBVR

2.9 V

SOT-23-5 – DBV

LP3_

Reel of 250

LP2981-29DBVT

Standard grade:

1.25% tolerance

Reel of 3000

LP2981-50DBVR

5 V

SOT-23-5 – DBV

LPD_

Reel of 250

LP2981-50DBVT

(1)

For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2)

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

(3)

The actual top-side marking has one additional character that designates the assembly/test site.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.