L7809

The L7809 is a fixed positive voltage regulator designed to provide a stable 9V output from a higher input voltage. It is commonly used in power supply circuits to ensure that sensitive electronic components receive a consistent voltage, despite variations in input voltage or load conditions. The L7809 is known for its reliability and ease of use in various electronic projects and power supply applications.

Key Features:

• Provides a fixed 9V output voltage
• Can handle input voltages up to 35V
• Built-in thermal overload protection
• Short circuit protection
• High current capability up to 1.5A
• Easy to use with minimal external components

Technical Specifications:

• Output Voltage: 9V ± 2%
• Input Voltage Range: Up to 35V
• Output Current: 1.5A (maximum)
• Dropout Voltage: Typically 2V at 1.5A
• Package Type: TO-220, TO-3, or similar

Applications:

• Power supplies for electronic circuits
• Voltage regulation in DIY electronics projects
• Battery-powered devices
• Audio and video equipment
• Industrial electronics

Usage:

1. Connect the input voltage (up to 35V) to the input pin of the L7809.
2. Connect the ground pin to the common ground of the circuit.
3. Connect the output pin to the load that requires a 9V power supply.
4. Add appropriate input and output capacitors as specified in the datasheet to stabilize the voltage regulation.

Caution:

• Ensure that the input voltage does not exceed 35V to avoid damage.
• Use a heatsink if the regulator is expected to handle high currents or if significant heat dissipation is required.
• Ensure proper cooling and ventilation to prevent overheating.

Datasheet:
For detailed technical specifications, refer to the L7809 Datasheet.