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LP3855

National Semiconductor
Part Number LP3855
Manufacturer National Semiconductor
Description 1.5A Fast Response Ultra Low Dropout Linear Regulators
Published Mar 22, 2005
Detailed Description LP3852/LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators March 2004 LP3852/LP3855 1.5A Fast Response Ultra...
Datasheet PDF File LP3855 PDF File

LP3855
LP3855

Overview
LP3852/LP3855 1.
5A Fast Response Ultra Low Dropout Linear Regulators March 2004 LP3852/LP3855 1.
5A Fast Response Ultra Low Dropout Linear Regulators General Description The LP3852/LP3855 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 LP3852/LP3855 are developed on a CMOS process which allows low quiescent current operation independent of output load current.
This CMOS process also allows the LP3852/LP3855 to operate under extremely low dropout conditions.
Dropout Voltage: Ultra low dropout voltage; typically 24mV at 150mA load current and 240mV at 1.
5A load current.
Ground Pin Current: Typically 4mA at 1.
5A 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).
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.
06% 10nA quiescent current in shutdown mode Guaranteed output current of 1.
5A 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 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 regulat...


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