LM7809 Voltage Regulator
The LM7809 Voltage Regulator is a dependable member of the 78XX linear regulator series, engineered to provide a consistent +9V DC output from input voltages typically ranging from 11V to 35V. It is well-suited for applications that require clean, regulated voltage for medium-power electronic circuits.
With its TO-220 form factor, the LM7809 integrates safety features like over-temperature protection, output transistor safe-area compensation, and short-circuit defense. This makes it a reliable power component for both beginner electronics projects and professional industrial setups.
🛠 Technical Details
| Specification | Details |
|---|---|
| Output Voltage | 9V (Fixed) |
| Input Voltage Range | 11V – 35V |
| Max Output Current | 1A to 1.5A (with proper heatsinking) |
| Dropout Voltage | 2V (typical) |
| Package Type | TO-220 |
| Output Type | Fixed Linear |
| Internal Protections | Thermal Shutdown, Short-Circuit |
| Operating Temperature | -40°C to +125°C |
💡 Use Cases & Applications
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🔌 Analog Circuit Power Supply
Perfect for powering op-amps, audio preamps, and other analog modules requiring a clean 9V rail. -
🧠 Sensor Systems
Provides stable voltage for sensitive sensor circuits, often used in industrial automation and data acquisition setups. -
🛠️ DIY Electronics & Hobby Projects
Commonly used in custom-made multimeters, signal generators, and embedded controllers. -
🚘 Automotive & Robotics
Suitable for circuits that require 9V regulation in robotics or automotive sensors. -
🔬 Educational Labs
Frequently used in electronics lab setups to provide fixed voltage rails for experiment boards and training kits.
🛠️ Pair With
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🔋 Power Supply Accessories – Adaptors, regulators, converters
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🔧 Tools & Accessories – For soldering, mounting, and testing
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🔘 Electronic Components – Capacitors, diodes, and filters
🎥 YouTube Tutorial
📺 How to Build a 9V Regulated Power Supply with LM7809
👉 Watch Tutorial
⚠️ Precautions & Tips
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🔥 Heatsink Required for loads above 500mA to avoid overheating
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🧴 Place Bypass Capacitors (0.33μF on input and 0.1μF on output) to improve performance
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🚫 Avoid reverse polarity and over-voltage inputs to prevent damage
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⚡ Ensure proper grounding for reduced electrical noise in analog circuits
🏁 Summary & Call-to-Action
The LM7809 Regulator IC is a must-have for electronics engineers and hobbyists seeking reliable 9V voltage regulation. With robust protection features and easy integration, it supports both educational and industrial projects efficiently.
👉 Order now from Electroway — your trusted electronics components partner.
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