National Semiconductor - LP5951 Micropower, 150mA Low-Dropout CMOS Voltage Data Manual
Summary
This low-dropout CMOS voltage regulator provides stable, efficient power management for portable and battery-operated systems. The robust LP5951 operates from 1.8V to 5.5V while offering excellent transient response and ultra-low quiescent current (down to 29µA). This manual details the device's full specifications, including operating temperature ranges (-40°C to +125°C), various fixed output voltage options (1.3V–3.3V), and mounting instructions for SOT23-5 and SC70-5 packages. It is ideal for electrical engineers designing reliable electronic circuits requiring precise power regulation.
Manual Details
| Brand | National |
|---|---|
| Pages | 13 |
| File Size | 639.27 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the recommended power source range for the LP5951 regulator?
The input voltage range is 1.8V to 5.5V.
How can the device be shut down or put into low-power mode?
You must set the Enable (EN) pin logic input to Low, as it should not be left floating.
What protection mechanisms are built into the LP5951?
The regulator features protection against internal short-circuit currents, over-temperature conditions, and thermal overload.
What are the package options for this component?
It is available in SOT23-5 (MF) and SC70-5 (MG) packages.