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LP3961, LP3964

SNVS056J – MAY 2000 – REVISED JUNE 2015

LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators

1 Features

3 Description

The LP396x series of fast ultra-low-dropout linear

1

•

Input Supply Voltage: 2.5 V to 7 V

regulators operate from a 2.5-V to 7-V input supply. A

•

Ultra-Low Dropout Voltage

wide range of preset output voltage options are

•

Low Ground Pin Current

available. These ultra-low dropout linear regulators

respond very fast to step changes in load which

•

Load Regulation of 0.02%

makes them suitable for low-voltage microprocessor

•

15-µA Quiescent Current in Shutdown Mode

applications. The LP3961 and LP3964 are developed

•

Specified Output Current of 0.8-A DC

on a CMOS process which allows low quiescent

current operation independent of output load current,

•

Output Voltage Accuracy ±1.5%

as well as operation under extremely low dropout

•

ERROR Flag Indicates Output Status (LP3961)

conditions.

•

Sense Option Improves Better Load Regulation

Dropout Voltage: Ultra-low dropout voltage; typically

(LP3964)

24 mV at 80-mA load current and 240 mV at 800-mA

•

Extremely Low Output Capacitor Requirements

load current.

•

Overtemperature and Overcurrent Protection

Ground Pin Current: Typically 4 mA at 800-mA load

•

−40°C to 125°C Junction Temperature Range

current.

ERROR Flag: ERROR flag goes low when the output

2 Applications

voltage drops 10% below nominal value (for LP3961).

•

Microprocessor Power Supplies

SENSE: SENSE pin improves regulation at remote

•

GTL, GTL+, BTL, and SSTL Bus Terminators

loads (for LP3964).

•

Power Supplies for DSPs

Precision Output Voltage: Multiple output voltage

•

SCSI Terminator

options are available ranging from 1.2 V to 5 V and

•

Post Regulators

adjustable (LP3964), with a specified accuracy of

•

High-Efficiency Linear Regulators

±1.5% at room temperature, and ±3% over all

conditions (varying line, load, and temperature).

•

Battery Chargers

•

Other Battery-Powered Applications

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SOT-223 (5)

6.50 mm × 3.56 mm

LP3961

LP3964

TO-263 (5)

10.16 mm × 8.42 mm

LP3964

TO-220 (5)

14.986 mm × 10.16 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

space

LP3964 Typical Application Circuits

LP3961 Typical Application Circuit

A.

through a 10-k

Ω pullup resistor. Connect

the ERROR pin to ground if this function is

not used.

Circuit.

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.