LP2989LV Datasheet, PDF (1/11 Pages) National Semiconductor (TI) – Micropower 500 mA Low Noise Low Dropout Regulator for Applications with Output Voltages < 2V Designed for Use with Very Low ESR Output Capacitors

February 2005
LP2989LV
Micropower 500 mA Low Noise Low Dropout Regulator
for Applications with Output Voltages ^< 2V
Designed for Use with Very Low ESR Output Capacitors
General Description
The LP2989LV is a 500 mA fixed-output voltage regulator
designed to provide high performance and low noise in
applications requiring output voltages < 2V.
Output noise can be reduced to 18µV (typical) by connecting
an external 10 nF capacitor to the bypass pin.
Using an optimized VIP™ (Vertically Integrated PNP) pro-
cess, the LP2989LV delivers superior performance:
Ground Pin Current: Typically 3 mA @ 500 mA load, and
110 µA @ 100 µA load.
Sleep Mode: The LP2989LV draws less than 0.8 µA quies-
cent 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: Guaranteed output voltage accuracy is
0.75% (“A” grade) and 1.25% (standard grade) at room
temperature.
For output voltages ≥ 2V, see LP2989 datasheet.
Features
n Ultra low dropout voltage
n Guaranteed 500 mA continuous output current
n Very low output noise with external capacitor
n SO-8, Mini SO-8, 8 Lead LLP surface mount packages
n <0.8 µA quiescent current when shutdown
n Low ground pin current at all loads
n 0.75% output voltage accuracy (“A” grade)
n High peak current capability (800 mA typical)
n Wide supply voltage range (16V max)
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
Applications
n Notebook/Desktop PC
n PDA/Palmtop Computer
n Wireless Communication Terminals
n SMPS Post-Regulator
Block Diagram
VIP™ is a trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation DS101357
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