February 2006
LP2981
Micropower 100 mA Ultra Low-Dropout Regulator in
SOT-23 and micro SMD Packages
General Description
Features
n Ultra low dropout voltage
The LP2981 is a 100 mA, fixed-output voltage regulator
designed specifically to meet the requirements of battery-
powered applications.
n Output voltage accuracy 0.75% (A Grade)
n Guaranteed 100 mA output current
n Smallest possible size (SOT-23, micro SMD package)
™
Using an optimized VIP (Vertically Integrated PNP) pro-
cess, the LP2981 delivers unequaled performance in all
specifications critical to battery-powered designs:
<
n
1 µA quiescent current when shutdown
n Low ground pin current at all load currents
n High peak current capability (300 mA typical)
n Wide supply voltage range (16V max)
n Fast dynamic response to line and load
n Low ZOUT over wide frequency range
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
@
Dropout Voltage. Typically 200 mV
100 mA load, and
@
7 mV 1 mA load.
@
Ground Pin Current. Typically 600 µA 100 mA load, and
@
80 µA 1 mA load.
Sleep Mode. Less than 1 µA quiescent current when ON/
OFF pin is pulled low.
Smallest Possible Size. SOT-23 and micro SMD packages
use an absolute minimum board space.
Applications
Precision Output. 0.75% tolerance output voltages avail-
able (A grade).
n Cellular Phone
n Palmtop/Laptop Computer
n Personal Digital Assistant (PDA)
n Camcorder, Personal Stereo, Camera
Eleven voltage options, from 2.5V to 5.0V, are available as
standard products.
Block Diagram
01250601
™
VIP is a trademark of National Semiconductor Corporation.
© 2006 National Semiconductor Corporation
DS012506
www.national.com
ROCHESTER [ Rochester Electronics ]
