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.