National Semiconductor LP5900 Ultra Low Noise, 100mA Linear Regulator for RF Analog Circuits - Requires No Bypass Capacitor
Summary
The LP5900 is a premium ultra low-noise linear voltage regulator designed specifically for sensitive RF and Analog circuits requiring stable power up to 100 mA. Providing class-leading performance, it features exceptionally low output noise (6.5 µV RMS) and stability without needing external bypass capacitors. This technical manual serves as a comprehensive guide, detailing electrical specifications, application circuitry, ordering details, and performance parameters needed by hardware engineers designing robust wireless LAN devices, PDA handsets, and other high-performance electronics.
Manual Details
| Brand | National |
|---|---|
| Pages | 10 |
| File Size | 630.40 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the maximum output current of the LP5900 regulator?
The LP5900 is capable of supplying up to 100 mA of output current.
Does this regulator require a noise bypass capacitor?
No, the design requires no bypass capacitor for low output voltage tolerance.
What input capacitors are recommended for optimal operation?
It should be run with 0.47 µF ceramic capacitors connected at both the input and output.
What is the operating temperature range for this device?
The Junction Temperature (Tj) operational range is from -40°C to +125°C, and ambient temperature is -40°C to +85°C.