onsemi

MC78M20BT

MC78M20BT Description

The MC78M20BT is a fixed output linear regulator designed for applications requiring a stable 20V output voltage and a maximum output current of 500mA. Manufactured by onsemi, this regulator is part of the Power Management Integrated Circuits (PMIC) category and is housed in a through-hole TO220AB package. Despite being marked as obsolete, the MC78M20BT remains a reliable choice for its robust performance and comprehensive protection features.

MC78M20BT Features

• Output Type: Fixed, ensuring a consistent 20V output voltage.
• Input Voltage Range: Capable of handling input voltages up to 40V, providing flexibility in power supply design.
• Output Current: Delivers a maximum output current of 500mA, suitable for a variety of low to medium power applications.
• Number of Regulators: Single regulator design simplifies circuit integration.
• Output Configuration: Positive output configuration, ideal for standard power supply needs.
• Protection Features: Equipped with over-temperature and short-circuit protection, enhancing reliability and preventing damage under adverse conditions.
• Power Supply Rejection Ratio (PSRR): Achieves 70dB at 120Hz, ensuring high performance in noisy environments.
• Moisture Sensitivity Level (MSL): MSL 1 (Unlimited), making it suitable for a wide range of manufacturing processes without moisture-related concerns.
• Package Type: Supplied in a tube package, facilitating easy handling and storage.
• Compliance: REACH unaffected and classified under ECCN EAR99, ensuring compliance with international regulations.

MC78M20BT Applications

The MC78M20BT is well-suited for a variety of applications where a stable 20V output and 500mA current are required. Its robust design and protection features make it ideal for:

• Power Supply Units: Provides a stable voltage source for electronic devices and systems.
• Consumer Electronics: Suitable for powering small to medium-sized devices, such as portable audio equipment and low-power peripherals.
• Industrial Applications: Ideal for use in control systems, sensors, and other industrial equipment requiring reliable power regulation.
• Telecommunications: Can be used in various telecom applications where a stable power supply is crucial for maintaining system integrity.

Conclusion of MC78M20BT

The MC78M20BT, despite its obsolete status, remains a viable option for applications requiring a fixed 20V output and up to 500mA of current. Its comprehensive protection features, high PSRR, and robust design make it a reliable choice for a variety of power management needs. While newer alternatives may offer additional features, the MC78M20BT's proven performance and compatibility with existing designs ensure it continues to be a valuable component in the electronics industry.