STMICROELECTRONICS L7912ACV -12V Voltage Regulator, TO-220

The STMICROELECTRONICS L7912ACV is a robust, single-gauge, 3-terminal negative voltage regulator providing a stable -12V DC output. This component is engineered to deliver reliable on-card power regulation, effectively solving the issues associated with centralised, single-point power distribution in electronic circuits.

As part of a series offering several fixed output voltages, it is extremely versatile. Its compatibility with the positive voltage L78 series makes it perfectly suited for creating balanced split or dual-rail power supplies, commonly required in audio amplifiers, operational amplifier circuits, and data acquisition systems.

Key Features & Protections

• High Current Output: Capable of delivering over 1.5A of output current when paired with an adequate heat sink.
• Integrated Protections: Features built-in thermal overload protection, short-circuit protection, and output transition Safe Operating Area (SOA) protection to safeguard both the regulator and your circuit under fault conditions.
• Excellent Accuracy: The AC version offers a tight output voltage tolerance of ±2% at 25°C, ensuring consistent performance.
• Adjustable Configuration: While designed as a fixed regulator, it can be used with external passive components to create adjustable voltage and current sources, offering design flexibility.

Housed in the industry-standard TO-220 package for through-hole mounting, it provides excellent thermal performance for heat dissipation. With a wide input voltage range from -35V to -19V and an operating temperature range of 0°C to 125°C, it is built for durability and stable operation in demanding environments.

This regulator is a fundamental component for professional engineers, hobbyists, and anyone requiring precise and reliable negative voltage regulation in their electronic projects.