LP3962, LP3965

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SNVS066H – MAY 2000 – REVISED APRIL 2013

LP3962/LP3965 1.5A Fast Ultra Low Dropout Linear Regulators

Check for Samples: LP3962, LP3965

1

FEATURES

DESCRIPTION

The LP3962/LP3965 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 0.04%

are

available.

These

ultra

low

dropout

linear

regulators respond very fast to step changes in load

•

15µA Quiescent Current in Shutdown Mode

which

makes

them

suitable

for

low

voltage

•

Specified Output Current of 1.5A DC

microprocessor applications. The LP3962/LP3965 are

•

Available in SOT-223,SFM/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%

LP3962/LP3965 to operate under extremely low

•

Error Flag Indicates Output Status (LP3962)

dropout conditions.

•

Sense Option Improves Better Load

Dropout Voltage: Ultra low dropout voltage; typically

Regulation (LP3965)

38mV at 150mA load current and 380mV at 1.5A load

•

Extremely Low Output Capacitor

current.

Requirements

Ground Pin Current: Typically 5mA at 1.5A load

•

Overtemperature/Overcurrent Protection

current.

•

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

Shutdown Mode: Typically 15µA quiescent current

when the shutdown pin is pulled low.

APPLICATIONS

Error Flag: Error flag goes low when the output

•

Microprocessor Power Supplies

voltage drops 10% below nominal value (for LP3962).

•

GTL, GTL+, BTL, and SSTL Bus Terminators

SENSE: Sense pin improves regulation at remote

•

Power Supplies for DSPs

loads. (For LP3965)

•

SCSI Terminator

Precision Output Voltage: Multiple output voltage

•

Post Regulators

options are available ranging from 1.2V to 5.0V and

•

High Efficiency Linear Regulators

adjustable (LP3965), with a specified accuracy of

±1.5% at room temperature, and ±3.0% over all

•

Battery Chargers

conditions (varying line, load, and temperature).

•

Other Battery Powered Applications

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 section for more information.

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, 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.