LP3873, LP3876

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SNVS220E – NOVEMBER 2002 – REVISED APRIL 2013

LP3873/LP3876 3A Fast Ultra Low Dropout Linear Regulators

Check for Samples: LP3873, LP3876

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FEATURES

DESCRIPTION

The LP3873/LP3876 series of fast ultra low-dropout

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•

Ultra Low Dropout Voltage

linear regulators operate from a +2.5V to +7.0V input

•

Low Ground Pin Current

supply. Wide range of preset output voltage options

•

Load Regulation of 0.08%

are

available.

These

ultra

low

dropout

linear

regulators respond very quickly to step changes in

•

1µA Quiescent Current in Shutdown Mode

load, which makes them suitable for low voltage

•

Ensured Output Current of 3A DC

microprocessor applications. The LP3873/LP3876 are

•

Available in DDPAK/TO-263 and TO-220

developed on a CMOS process which allows low

Packages

quiescent current operation independent of output

load current. This CMOS process also allows the

•

Output Voltage Accuracy ± 1.5%

LP3873/LP3876 to operate under extremely low

•

Error Flag Indicates Output Status

dropout conditions.

•

Sense Option Improves Load Regulation

Dropout Voltage: Ultra low dropout voltage; typically

•

Minimum Output Capacitor Requirements

80mV at 300mA load current and 800mV at 3A load

•

Overtemperature/overcurrent Protection

current.

•

−40°C to +125°C Junction Temperature Range

Ground Pin Current: Typically 6mA at 3A load

current.

APPLICATIONS

Shutdown Mode: Typically 1µA quiescent current

•

Microprocessor Power Supplies

when the shutdown pin is pulled low.

•

GTL, GTL+, BTL, and SSTL Bus Terminators

Error Flag:Error flag goes low when the output

•

Power Supplies for DSPs

voltage drops 10% below nominal value.

•

SCSI Terminator

SENSE: Sense pin improves regulation at remote

•

Post Regulators

loads.

•

High Efficiency Linear Regulators

Precision Output Voltage: Multiple output voltage

•

Battery Chargers

options are available ranging from 1.8V to 5.0V with

an ensured accuracy of ±1.5% at room temperature,

•

Other Battery Powered Applications

and ±3.0% over all conditions (varying line, load, and

temperature).

Typical Application Circuits

*SD and ERROR pins must be pulled high through a 10k

Ω pull-up resistor. Connect the ERROR pin to ground if this

function is not used. See Application Hints for more information.

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PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2013, 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.