LM7809 9V Positive Voltage Regulator IC

LM7809 9V Positive Voltage Regulator IC 

The LM7809 is a fixed +9V positive linear voltage regulator designed to provide a stable and reliable +9V DC output for a wide range of electronic applications. It belongs to the 78xx family of positive voltage regulators and is widely used in power supply circuits, embedded systems, and industrial electronics.

The LM7809 features built-in current limiting, thermal shutdown, and short-circuit protection, ensuring safe and reliable operation. It is commonly available in packages such as TO-220 and TO-3, making it suitable for both prototyping and production designs with proper heatsinking.

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Applications

• +9V regulated power supplies
• Embedded systems and microcontroller power rails
• Industrial control and automation systems
• Audio amplifiers and signal processing circuits
• Measurement and instrumentation equipment
• Communication and networking equipment
• Power supply modules

Features

• Fixed Output Voltage: +9V DC
• Regulator Type: Positive linear voltage regulator
• Output Current: Up to 1A (typical, depends on package and heatsinking)
• Built-in thermal shutdown and current limiting protection
• Short-circuit protected
• Good line and load regulation
• Requires minimal external components
• Stable and reliable operation
• High reliability and long service life

LM7809-Datasheet