onsemi

MC78M15ABTG

MC78M15ABTG Description

The MC78M15ABTG from onsemi is a fixed-output linear voltage regulator designed to deliver a stable +15V output with a maximum current capacity of 500mA. This through-hole (TO-220AB) device operates with an input voltage range up to 35V, making it suitable for a variety of power supply applications. It features over-temperature and short-circuit protection, ensuring reliable operation under adverse conditions. With a PSRR of 70dB (120Hz), it effectively filters input noise, making it ideal for sensitive analog and digital circuits. Although marked as obsolete, it remains a robust choice for legacy designs due to its compliance with ROHS3 and REACH standards.

MC78M15ABTG Features

• Fixed +15V Output: Precision-regulated voltage for consistent performance.
• High Input Voltage Tolerance: Supports up to 35V, accommodating wide input variations.
• 500mA Output Current: Sufficient for moderate-power applications.
• Built-in Protections: Includes over-temperature and short-circuit safeguards.
• Low Noise: 70dB PSRR at 120Hz minimizes ripple in sensitive circuits.
• Through-Hole (TO-220AB) Package: Easy to mount and heatsink for thermal management.
• Compliance: ROHS3 and REACH compliant, with MSL 1 (Unlimited) moisture sensitivity.

MC78M15ABTG Applications

This regulator is well-suited for:

• Industrial Control Systems: Providing stable voltage to sensors, actuators, and control logic.
• Consumer Electronics: Powering audio amplifiers, display drivers, and legacy devices.
• Automotive Electronics: Auxiliary power supplies in non-critical automotive systems.
• Test & Measurement Equipment: Ensuring clean power for precision analog circuits.
• Retrofit Designs: Replacing older 78M15 variants in maintenance or upgrade projects.

Conclusion of MC78M15ABTG

The MC78M15ABTG is a reliable, albeit obsolete, linear voltage regulator offering high noise rejection, robust protection features, and a wide input voltage range. Its TO-220AB package and 500mA output make it a practical choice for industrial, automotive, and consumer applications where moderate power and stability are key. While newer alternatives exist, its proven performance ensures continued relevance in legacy and cost-sensitive designs.