LP3981

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SNVS159G – OCTOBER 2001 – REVISED MAY 2013

LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator

Check for Samples: LP3981

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FEATURES

APPLICATIONS

2

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Small, Space Saving VSSOP-8

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CDMA Cellular Handsets

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Low Thermal Resistance in WSON-6 Package

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Wideband CDMA Cellular Handsets

Gives Excellent Power Capability

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GSM Cellular Handsets

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Logic Controlled Enable

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Portable Information Appliances

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Stable with Ceramic and High Quality

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Tiny 3.3V ± 5% to 2.5V, 300mA Converter

Tantalum Capacitors

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Fast Turn-On

DESCRIPTION

The LP3981's performance is optimized for battery

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Thermal Shutdown and Short-Circuit Current

powered systems to deliver ultra low noise, extremely

Limit

low dropout voltage and low quiescent current.

Regulator ground current increases only slightly in

KEY SPECIFICATIONS

dropout, further prolonging the battery life.

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2.5 to 6.0V Input Range

Power supply rejection is better than 60 dB at low

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300mA Output

frequencies. This high power supply rejection is

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60dB PSRR at 1kHz

maintained down to lower input voltage levels

common to battery operated circuits.

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≤1μA Quiescent Current when Shut Down

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Fast Turn-On Time: 120

The device is ideal for mobile phone and similar

battery powered wireless applications. It provides up

= 0.01uF

to 300 mA, from a 2.5V to 6V input, consuming less

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132mV Typ Dropout with 300mA Load

than 1µA in disable mode.

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35

μVrms Output Noise over 10Hz to 100kHz

The LP3981 is available in VSSOP-8 package. For

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−40 to +125°C Junction Temperature Range for

LP3981 in WSON-6 package, contact TI sales offices.

Operation

Performance is specified for

−40°C to +125°C

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2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V

temperature range. The device available in the

Outputs Standard

following output voltages; 2.5V, 2.7V, 2.8V, 2.83V,

3.0V, 3.03V and 3.3V as standard. Other output

options can be made available, please contact your

local TI sales office.

Typical Application Circuit

Note: Pin Numbers in parenthesis indicate WSON-6 package.

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2001–2013, 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.