1 Features
1• 2.1-V to 16-V Input Voltage Range
• Ultra-Low Dropout Voltage
• 500-mA Continuous Output Current
• Very Low Output Noise With External Capacitor
• < 0.8-μA Quiescent Current When Shut Down
• Low Ground Pin Current at All Loads
• 0.75% Output Voltage Accuracy (A Grade)
• High Peak Current Capability (800-mA typical)
• Overtemperature and Overcurrent Protection
• −40°C to +125°C Junction Temperature Range

2 Applications
• Notebooks and Desktop PCs
• PDAs and Palmtop Computers
• Wireless Communication Pins
• SMPS Post-Regulators

3 Description
The LP2989LV is a fixed-output 500-mA precision
LDO regulator designed for use with ceramic output capacitors.
Output noise can be reduced to 18 μV (typical) by
connecting an external 10-nF capacitor to the bypass
pin.
Using an optimized Vertically Integrated PNP (VIP)
process, the LP2989LV delivers superior
performance:
Ground Pin Current: Typically 3 mA at 500-mA load,
and 110 μA at 100-μA load.
Sleep Mode: The LP2989LV draws less than 0.8-μA
quiescent current when SHUTDOWN pin is pulled
low.
ERROR Flag: The built-in ERROR flag goes low
when the output drops approximately 5% below nominal.
Precision Output: Output voltage accuracy is 0.75%
(A grade) and 1.25% (standard grade) at room
temperature.
For output voltages greater than or equal to 2 V, see
the LP2989 (SNVS083) data sheet.