onsemi

MC78M15CT

MC78M15CT Description

The MC78M15CT is a fixed +15V linear voltage regulator from onsemi, designed to deliver a stable 500mA output current with an input voltage range up to 35V. Housed in a TO-220AB package, this through-hole-mount IC is part of the 78Mxx series, offering reliable voltage regulation for a variety of electronic systems. Although marked as obsolete, it remains a robust choice for legacy designs due to its high PSRR (70dB at 120Hz), wide operating temperature range (0°C to 125°C), and built-in over-temperature and short-circuit protection. Its REACH-unaffected status ensures compliance with environmental regulations.

MC78M15CT Features

• Fixed +15V Output: Ensures precise voltage regulation without external adjustments.
• High Input Voltage Tolerance (35V Max): Suitable for applications with fluctuating input power.
• 500mA Output Current: Supports moderate-power loads, ideal for small to mid-range circuits.
• Excellent PSRR (70dB): Minimizes ripple and noise, critical for sensitive analog/digital systems.
• Robust Protection: Includes thermal shutdown and short-circuit protection for enhanced reliability.
• Wide Temperature Range: Operates reliably in harsh environments (0°C to 125°C).
• Through-Hole (TO-220AB) Packaging: Facilitates easy mounting and heat dissipation.

MC78M15CT Applications

The MC78M15CT is well-suited for:

• Power Supplies: Stabilizing voltage in AC/DC adapters, industrial control systems, and bench power supplies.
• Automotive Electronics: Providing regulated power to sensors, displays, and infotainment systems (within temp limits).
• Consumer Electronics: Used in audio amplifiers, set-top boxes, and gaming consoles requiring steady +15V rails.
• Industrial Equipment: Ideal for PLC modules, motor drivers, and test instrumentation due to its rugged design.
• Legacy Systems: A dependable choice for maintaining or repairing older electronics where modern alternatives may not be pin-compatible.

Conclusion of MC78M15CT

The MC78M15CT is a high-performance linear regulator offering stable 15V output, robust protection, and wide compatibility—making it a versatile solution for both industrial and consumer applications. While obsolete, its proven reliability, ease of integration, and strong noise suppression ensure continued relevance in legacy and cost-sensitive designs. Engineers seeking a simple, no-frills voltage regulator with onsemi’s quality will find this IC a practical choice.