National Semiconductor LP3881 0.8A Fast Response Ultra Low Dropout Linear Regulators Data Sheet User Manual
Summary
The LP3881 is a fast-response, ultra-low dropout linear regulator designed for reliable power solutions in demanding electronic applications. Featuring an exceptionally low dropout voltage (75 mV @ 0.8A) and high current capacity, this device ensures stable voltage regulation even during rapid load changes. The accompanying manual provides comprehensive technical documentation, including detailed electrical characteristics, application circuits, and packaging information. It is ideal for engineers developing power supplies for microcontrollers, DSP systems, Server Core electronics, and Switch Mode Power Supply (SMPS) post-regulators requiring maximum efficiency and fast transient response.
Manual Details
| Brand | National |
|---|---|
| Pages | 12 |
| File Size | 318.59 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What is the dropout voltage at typical operating conditions?
The typical dropout voltage is 75 mV at a 0.8A load current.
Does this regulator require external components for stable operation?
Stability requires at least 4.7 µF of both input and output capacitance.
What are the temperature operating limits?
The device operates from -40˚C to +125˚C junction temperature range.
How does the device function when powered down?
In shutdown, a low S/D pin current of 0.03 µA is drawn from the bias supply (V_BIAS).
What type of packages are available for this regulator?
It is available in TO-220 and TO-263 packages.