LM7909 9V Negative Voltage Regulator IC

LM7909 9V Negative Voltage Regulator IC 

The LM7909 is a fixed –9V negative linear voltage regulator designed to provide a stable and reliable –9V DC output for electronic circuits that require a negative voltage rail. It is part of the 79xx family of negative voltage regulators and is widely used in dual-polarity power supplies, analog circuits, and industrial electronics.

The LM7909 includes 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-92, making it suitable for both prototyping and production designs.

Click here to view related products

Applications

• .Dual-polarity (±) power supplies
• Analog and op-amp circuits requiring –9V rail
• Audio amplifiers and signal processing circuits
• Industrial control systems
• Measurement and instrumentation equipment
• Embedded systems needing negative voltage supply
• Power supply modules

Features

• Fixed Output Voltage: –9V DC
• Regulator Type: Negative 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

LM7909-Datasheet