1FEATURES

2• Ultra Low Dropout Voltage

• Low Ground Pin Current

• Load Regulation of 0.08%

• 1μA Quiescent Current in Shutdown Mode

• Specified Output Current of 3A DC

• Available in DDPAK/TO-263 and TO-220

Packages

• Minimum output Capacitor Requirements

• Overtemperature/Overcurrent Protection

• −40°C to +125°C Junction Temperature Range

APPLICATIONS

• 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

DESCRIPTION

The LP3876-ADJ fast ultra low-dropout linear

regulators operate from a +2.5V to +7.0V input

supply. These ultra low dropout linear regulators

respond very quickly to step changes in load, which

makes them suitable for low voltage microprocessor

applications. The LP3876-ADJ is developed on a CMOS process which allows low quiescent current

operation independent of output load current. This

CMOS process also allows the LP3876-ADJ to

operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically

80mV at 300mA load current and 800mV at 3A load

current.

Ground Pin Current: Typically 6mA at 3A load

current.

Shutdown Mode: Typically 1μA quiescent current

when the shutdown pin is pulled low.

Adjustable Output Voltage: The output voltage may

be programmed via two external resistors.