LP3961_15 Datasheet, PDF (1/31 Pages) Texas Instruments – LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators

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LP3961, LP3964
SNVS056J – MAY 2000 – REVISED JUNE 2015
LP396x 800-mA Fast Ultra-Low-Dropout Linear Regulators
1 Features
•1 Input Supply Voltage: 2.5 V to 7 V
• Ultra-Low Dropout Voltage
• Low Ground Pin Current
• Load Regulation of 0.02%
• 15-µA Quiescent Current in Shutdown Mode
• Specified Output Current of 0.8-A DC
• Output Voltage Accuracy ±1.5%
• ERROR Flag Indicates Output Status (LP3961)
• Sense Option Improves Better Load Regulation
(LP3964)
• Extremely Low Output Capacitor Requirements
• Overtemperature and Overcurrent Protection
• −40°C to 125°C Junction Temperature Range
2 Applications
• Microprocessor Power Supplies
• GTL, GTL+, BTL, and SSTL Bus Terminators
• Power Supplies for DSPs
• SCSI Terminator
• Post Regulators
• High-Efficiency Linear Regulators
• Battery Chargers
• Other Battery-Powered Applications
LP3964 Typical Application Circuits
3 Description
The LP396x series of fast ultra-low-dropout linear
regulators operate from a 2.5-V to 7-V input supply. A
wide range of preset output voltage options are
available. These ultra-low dropout linear regulators
respond very fast to step changes in load which
makes them suitable for low-voltage microprocessor
applications. The LP3961 and LP3964 are developed
on a CMOS process which allows low quiescent
current operation independent of output load current,
as well as operation under extremely low dropout
conditions.
Dropout Voltage: Ultra-low dropout voltage; typically
24 mV at 80-mA load current and 240 mV at 800-mA
load current.
Ground Pin Current: Typically 4 mA at 800-mA load
current.
ERROR Flag: ERROR flag goes low when the output
voltage drops 10% below nominal value (for LP3961).
SENSE: SENSE pin improves regulation at remote
loads (for LP3964).
Precision Output Voltage: Multiple output voltage
options are available ranging from 1.2 V to 5 V and
adjustable (LP3964), with a specified accuracy of
±1.5% at room temperature, and ±3% over all
conditions (varying line, load, and temperature).
Device Information⁽¹⁾
PART NUMBER PACKAGE BODY SIZE (NOM)
LP3961
LP3964
SOT-223 (5)
TO-263 (5)
6.50 mm × 3.56 mm
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
LP3961 Typical Application Circuit
A. ^*SD and ERROR pins must be pulled high
through a 10-kΩ pullup resistor. Connect
the ERROR pin to ground if this function is
not used.
*_{See note A on LP3961 Typical Application}
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.