LP3872, LP3875
www.ti.com
SNVS227F –FEBRUARY 2003–REVISED APRIL 2013
LP3872/LP3875 1.5A Fast Ultra Low Dropout Linear Regulators
Check for Samples: LP3872, LP3875
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FEATURES
DESCRIPTION
The LP3872/LP3875 series of fast ultra low-dropout
linear regulators operate from a +2.5V to +7.0V input
supply. Wide range of preset output voltage options
are available. These ultra low dropout linear
regulators respond very quickly to step changes in
load, which makes them suitable for low voltage
microprocessor applications. The LP3872/LP3875 are
developed on a CMOS process which allows low
quiescent current operation independent of output
load current. This CMOS process also allows the
LP3872/LP3875 to operate under extremely low
dropout conditions.
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Ultra Low Dropout Voltage
Low Ground Pin Current
Load Regulation of 0.06%
10nA Quiescent Current in Shutdown Mode
Ensured Output Current of 1.5A DC
Available in DDPAK/TO-263, TO-220 and
SOT-223 Packages
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Output Voltage Accuracy ± 1.5%
Error Flag Indicates Output Status
Sense Option Improves Load Regulation
Minimum Output Capacitor Requirements
Overtemperature/Overcurrent Protection
−40°C to +125°C Junction Temperature Range
Dropout Voltage: Ultra low dropout voltage; typically
38mV at 150mA load current and 380mV at 1.5A load
current.
Ground Pin Current: Typically 6mA at 1.5A load
current.
APPLICATIONS
Shutdown Mode: Typically 10nA quiescent current
when the shutdown pin is pulled low.
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Microprocessor Power Supplies
GTL, GTL+, BTL, and SSTL Bus Terminators
Power Supplies for DSPs
SCSI Terminator
Error Flag: Error flag goes low when the output
voltage drops 10% below nominal value.
SENSE: Sense pin improves regulation at remote
loads.
Post Regulators
High Efficiency Linear Regulators
Battery Chargers
Precision Output Voltage: Multiple output voltage
options are available ranging from 1.8V to 5.0V with a
specified accuracy of ±1.5% at room temperature,
and ±3.0% over all conditions (varying line, load, and
temperature).
Other Battery Powered Applications
TYPICAL APPLICATION CIRCUITS
*SD and ERROR pins must be pulled high through a 10kΩ 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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2013, Texas Instruments Incorporated