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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.