LP3856 Datasheet | National Semiconductor

Description The LP3853/LP3856 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 LP3853/LP3856 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3853/LP3856 to operate under extremely low dropout conditions. Dropout Voltage: Ultra low dropout voltage; typically 39m V at 300m A load current and 390m V at 3A load current. Ground Pin Current: Typically 4m A at 3A 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 Stable with selected ceramic capacitors Low ground pin current Load regulation of 0.08% 10n A quiescent current in shutdown mode Guaranteed output current of 3A DC Available in TO-263 and TO-220 packages Output voltage accuracy ± 1.5% Error flag indicates output status Sense option improves load regulation Overtemperature/overcurrent protection - 40˚C to +125˚C junction temperature range Applications n n n n n n n n n Microprocessor power supplies Stable with ceramic output capacitors 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...