Features: Ultra low dropout voltage
Stable with selected ceramic capacitors
Low ground pin current
Load regulation of 0.08%
10nA 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 to +125 junction temperature rangeApplicationMicroprocessor 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 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 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 quies- cent current operation independent of output load current. This CMOS process also allows the LP3853/LP3856 to op- erate under extremely low dropout conditions.
Dropout Voltage: Ultra low dropout voltage; typically 39mV at 300mA load current and 390mV at 3A load current. Ground Pin Current: Typically 4mA at 3A 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).
LP3853 Data Sheet
