Features: Ultra low dropout voltage
Low ground pin current
Load regulation of 0.04%
10nA quiescent current in shutdown mode
Guaranteed output current of 0.8A DC
Available in TO-263, TO-220 and SOT-223 packages
Output voltage accuracy ± 1.5%
Error flag indicates output status
Sense option improves load regulation
Minimum output capacitor requirements
Overtemperature/overcurrent protection
-40 to +125junction temperature rangeApplicationMicroprocessor 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 applicationsPinout
SpecificationsStorage Temperature Range ........................................-65 to +150
Lead Temperature
(Soldering, 5 sec.) ........................................................................260
ESD Rating (Note 3)....................................................................... 2 kV
Power Dissipation (Note 2)........................................ Internally Limited
Input Supply Voltage (Survival) ......................................-0.3V to +7.5V
Shutdown Input Voltage(Survival).................................... -0.3V to 7.5V
Output Voltage (Survival), (Note6), (Note 7) ..................-0.3V to +6.0V
IOUT(Survival) Short Circuit Protected
Maximum Voltage for ERROR
Pin.................................................................................................... VIN
Maximum Voltage for SENSE Pin..................................................... VOUT
DescriptionThe LP3871/LP3874 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 LP3871/LP3874 are developed on a CMOS process which allows low quies- cent current operation independent of output load current. This CMOS process also allows the LP3871/LP3874 to op- erate under extremely low dropout conditions.
Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 0.8A load current. Ground Pin Current: Typically 6mA at 0.8A load current. Shutdown Mode: Typically 10nA quiescent current when the shutdown pin is pulled low.
Error Flag: Error flag goes low when the output voltage drops 10% below nominal value. SENSE: Sense pin improves regulation at remote loads. Precision Output Voltage: Multiple output voltage options are available ranging from 1.8V to 5.0V with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).
LP3871 Data Sheet
