National Semiconductor LP2981 Micropower 100mA Ultra Low-Dropout Regulator Data Sheet
Summary
This ultra low-dropout (LDO) regulator is engineered for sophisticated battery-powered electronics requiring minimal power consumption and high efficiency. The LP2981 provides precise output voltage regulation (0.75%) with extremely low quiescent current, making it perfect for devices like PDAs, cellular phones, and consumer cameras. This manual serves as a comprehensive resource, detailing all technical specifications, available voltage grades (e.g., 2.5V to 5.0V), package options, and ordering information needed for seamless integration into battery-sensitive designs.
Page 1 Text Content
查询LP2981AIBP-2.5供应商
March
LP icropow er ltra Low -D ropout egulator
LP2981 Micropower m A Ultra Low-Dropout Regulator General Description Features
The LP2981 is m A, fixed-output voltage regulator de- Ultra low dropout voltage
signed specifically to meet the requirements of Output voltage accuracy 0.75% (A Grade) battery-powered applications. Guaranteed m A output current Using an optimized VIP™ (Vertically Integrated PNP) pro- Smallest possible size (SOT-23, micro SMD package) cess, the LP2981 delivers unequaled performance in all µA quiescent current when shutdown specifications critical to battery-powered designs:
Low ground pin current at all load currents
Dropout Voltage. Typically m V m A load, and High peak current capability (300 m A typical) m V m A load.
Wide supply voltage range (16V max)
Ground Pin Current. Typically µA m A load, and Fast dynamic response to line and load µA m A load.
Low ZOUT over wide frequency range
Sleep Mode. Less than µA quiescent current when ON/ Overtemperature/overcurrent protection OFF pin is pulled low.
−40˚C to +125˚C junction temperature range
Smallest Possible Size. SOT-23and micro SMD packages use an absolute minimum board space. Applications Precision Output. 0.75% tolerance output voltages avail-
Cellular Phone
able (A grade).
Palmtop/Laptop Computer
Eleven voltage options, from 2.5V to 5.0V, are available as
Personal Digital Assistant (PDA)
standard products.
Camcorder, Personal Stereo, Camera
Block Diagram
DS012506-1
VIP™ is trademark of National Semiconductor Corporation.
National Semiconductor Corporation DS012506 www.national.com
Page Summary Contents For National Semiconductor LP2981 Micropower 100mA Ultra Low-Dropout Regulator Data Sheet
Manual Details
| Brand | National |
|---|---|
| Pages | 16 |
| File Size | 410.10 KB |
| Published | June 16, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the typical quiescent current when operating in low-power modes?
The LP2981 has a quiescent current of less than 1 μA in Sleep Mode, and very low when the OFF pin is pulled low.
What is the maximum supply voltage range for this regulator?
It supports a wide supply voltage range up to 16V max.
How small are these regulators physically packaged?
The device uses an absolute minimum board space with packages like SOT-23 and micro SMD.
Are there usage restrictions I should know about?
These products cannot be used as critical components in life support devices or systems without written written approval from the manufacturer.