1 Features

1• Input Voltage Range: 2.5 V to 7 V

• Ultra Low Dropout Voltage

• Low Ground Pin Current

• Load Regulation of 0.06%

• 10-nA Quiescent Current in Shutdown Mode

• Specified Output Current of 1.5-A DC

• Minimum Output Capacitor Requirements

• Overtemperature/Overcurrent Protection

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

• Available in DDPAK/TO-263 and SOT-223

Packages

2 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

3 Description

The LP3875-ADJ fast ultra-low-dropout LDO operates

from a 2.5-V to 7-V input supply. This ultra-lowdropout

LDO responds very quickly to step changes

in load, which makes it suitable for low-voltage

microprocessor applications. The LP3875-ADJ is

developed on a CMOS process, which allows low

quiescent-current operation independent of output

load current. This CMOS process also allows the

LP3875-ADJ to operate under extremely low dropout

conditions.

• Dropout Voltage: Ultra-low-dropout voltage;

typically 38 mV at 150-mA load current and 380

mV at 1.5-A load current.

• Ground Pin Current: Typically 6 mA at 1.5-A load

current.

• Shutdown Mode: Typically 10-nA quiescent

current when the SD pin is pulled low.

• Adjustable Output Voltage: The output voltage

may be programmed via two external resistors.