L7809 9V Voltage Regulator – TO-220

The L7809 is a fixed-output linear voltage regulator designed to provide a stable 9V DC output from a higher input voltage source. It integrates internal reference circuitry, pass elements, and protection mechanisms to maintain reliable voltage regulation under varying load conditions. The device includes built-in current limiting, thermal shutdown, and safe operating area protection, ensuring robust and safe operation. With minimal external component requirements and a durable TO-220 package, the L7809 is widely used in analog circuits, embedded systems, and general-purpose power supply applications.

Features

- Fixed 9V regulated output

- Maximum output current up to 1A

- Wide input voltage range (11V to 35V)

- Internal current limiting protection

- Thermal shutdown protection

- Safe operating area protection

- Low output noise suitable for analog circuits

- Stable linear regulation performance

- Simple external component requirements

- Reliable power supply for embedded systems

- TO-220 package for efficient heat dissipation

- Through-hole PCB mounting

- Easy integration into power designs

- Suitable for digital and analog applications

Specifications

- Model: L7809

- Regulator Type: Linear Voltage Regulator

- Output Voltage: 9V Fixed

- Maximum Output Current: 1A

- Input Voltage Range: 11V to 35V

- Dropout Voltage (Typical): 2V

- Line Regulation: 0.01% / V

- Load Regulation: 0.1%

- Protection Features: Current Limit, Thermal Shutdown, Safe Operating Area Protection

- Operating Temperature Range: -40°C to +125°C

- Package Type: TO-220

- Mounting Type: Through-Hole

- Application Type: Power Regulation

Links

- 3D Model

- Datasheet

Tutorials

LM7809IC-B188F11A | LM7809CV DC Voltage Regulator 9V fix output