Description:

The LM7909 is a negative voltage regulator IC from the LM79XX series that provides a stable and accurate -09V output, making it ideal for circuits requiring a negative voltage source. It is capable of providing up to 1.5A of output current, with some manufacturers offering versions that provide 1A output. This IC is widely used in power supply systems, charger circuits, and voltage converter applications.

The LM7909 features robust thermal overload protection, safe-area protection, and short-circuit protection. These features make the IC highly reliable for both commercial and experimental use. The TO-220 package ensures that the IC can be easily integrated into circuits, while also supporting efficient heat dissipation.

This IC requires only a single output capacitor for stabilization, and input capacitors may be needed if the IC is located far from the input supply filter capacitor. For circuits using larger capacitors, protection diodes should be included to safeguard the IC’s internal circuitry from damage due to capacitor output spikes.

Features:

• Stable Output: Provides a regulated -09V output voltage.

• Output Current: Supports up to 1.5A of output current (Some versions provide 1A).

• Protection Features: Includes thermal overload protection, safe-area protection, and short circuit protection.

• TO-220 Package: Ideal for efficient heat dissipation.

• Low Quiescent Current: Minimizes energy consumption when idle.

• Low Price: Economical solution for negative voltage regulation.

• Commercial and Experimental Use: Suitable for use in commercial equipment and DIY/student projects.

Applications:

• Power Supply Systems: Used in systems that require a -09V regulated negative voltage.

• Charger Circuits: Ideal for circuits needing a stable negative output voltage.

• Voltage Converters: Useful in converting voltage in both power and signal processing applications.

Heat Dissipation:

For circuits requiring higher currents or when the input-output voltage difference is large, it is recommended to use a heat sink to prevent overheating.

Package Includes:

• 5 x LM7909 Negative Voltage Regulator IC (TO-220 Package).

Disclaimer:

Product specifications, features, and design may change over time due to product updates or improvements.