LP3874 Datasheet | National Semiconductor

Description The 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 quiescent current operation independent of output load current. This CMOS process also allows the LP3871/LP3874 to operate under extremely low dropout conditions. Dropout Voltage: Ultra low dropout voltage; typically 24m V at 80m A load current and 240m V at 0.8A load current. Ground Pin Current: Typically 6m A at 0.8A load current. Shutdown Mode: Typically 10n A 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). Features n n n n n n n n n n n n Ultra low dropout voltage Low ground pin current Load regulation of 0.04% 10n A 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˚C to +125˚C junction temperature range Applications n n n n n n n n 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 Typical Application Circuits - SD and ERROR pins must be pulled high through a 10kΩ pull-up...