ONSEMI MC7812BTG Fixed 12V 1A Linear Voltage Regulator, TO-220

The ONSEMI MC7812BTG is a high-performance, positive fixed-voltage linear regulator, engineered to deliver a stable 12V output at up to 1.0A of current from an input voltage range of 19V to 35V. As a monolithic integrated circuit, it is designed for a wide variety of local, on-card regulation applications, providing a simple and reliable power solution where consistent voltage is critical.

This robust regulator incorporates multiple built-in protection features to ensure safe and durable operation. These include internal current limiting, thermal shutdown, and safe-area compensation for the output transistor. With adequate heat sinking, the device can reliably deliver output currents exceeding 1.0A, making it suitable for more demanding circuits.

Key Features & Benefits

• Integrated Protection: No external components are required for basic operation, simplifying design and reducing board space. The internal safeguards protect the device from thermal overload and short-circuit conditions.
• High Output Capability: Capable of delivering in excess of 1.0A, supported by a low output resistance of 1.1mΩ at 1kHz.
• Fixed & Adjustable Use: While primarily a fixed 12V regulator, the device can be configured with external components to provide adjustable output voltages and currents, offering design flexibility.
• Robust Construction: Housed in a standard TO-220-3 through-hole package, it is easy to mount and heatsink for optimal thermal performance.

Technical Specifications

• Output Voltage: Fixed at 12V nominal.
• Input Voltage Range: 19V to 35V.
• Maximum Output Current: 1A.
• Peak Output Current: 2.2A (at 25°C).
• Short-Circuit Current Limit: 0.2A (at 25°C).
• Operating Temperature Range: -40°C to 125°C.
• Package: 3-pin TO-220, through-hole mounting.

This regulator is a cornerstone of