onsemi

MC78M18BT

MC78M18BT Description

The MC78M18BT is a linear voltage regulator designed for applications requiring a stable and reliable power supply. Manufactured by onsemi, this device is part of the Power Management Integrated Circuit (PMIC) category and is housed in a Through Hole TO220AB package. The regulator is designed to provide a fixed 18V output voltage with a maximum output current of 500mA. It features a maximum input voltage of 35V, ensuring compatibility with a wide range of input sources.

MC78M18BT Features

• Output Type: Fixed, providing a stable 18V output voltage.
• Input Voltage Range: Up to 35V, making it suitable for various power supply applications.
• Output Current: Capable of delivering up to 500mA, ideal for moderate power requirements.
• Number of Regulators: Single regulator design, simplifying circuit design and reducing complexity.
• Output Configuration: Positive output voltage, suitable for most common applications.
• Protection Features: Over-temperature and short-circuit protection ensure reliable operation and protect against common faults.
• Power Supply Rejection Ratio (PSRR): 70dB at 120Hz, providing excellent noise suppression and voltage regulation.
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited), ensuring robustness in various environmental conditions.
• Package: Supplied in a Tube package, facilitating easy handling and storage.

MC78M18BT Applications

The MC78M18BT is ideal for applications where a stable and reliable 18V power supply is required. Its 500mA output current capability makes it suitable for moderate power applications such as:

• Consumer Electronics: Providing stable power to devices like radios, amplifiers, and small appliances.
• Industrial Equipment: Powering control boards and sensors in industrial settings.
• Telecommunications: Supplying power to communication modules and small-scale networking devices.
• Automotive: Used in various automotive electronic systems where a stable 18V supply is needed.

Conclusion of MC78M18BT

The MC78M18BT is a robust and reliable linear voltage regulator designed to meet the power supply needs of various applications. Its fixed 18V output and 500mA current capability, combined with over-temperature and short-circuit protection features, make it an ideal choice for applications requiring stable and reliable power. Despite being marked as obsolete, the MC78M18BT remains a viable option for legacy systems and applications where its specific voltage and current requirements are necessary. Its Through Hole TO220AB package ensures ease of integration into existing designs, making it a practical solution for engineers and designers in the electronics industry.