onsemi

MC78M05ACDTG

MC78M05ACDTG Description

The MC78M05ACDTG is a fixed 5V linear voltage regulator from onsemi, designed to deliver up to 500mA of output current with a wide input voltage range of up to 35V. Housed in a DPAK (TO-252) surface-mount package, this regulator is optimized for compact and efficient power management solutions. It features over-temperature and short-circuit protection, ensuring robust operation in demanding environments. With a PSRR of 80dB at 120Hz, it provides excellent noise suppression, making it suitable for sensitive analog and digital circuits. Although marked as obsolete, it remains a reliable choice for legacy designs, offering ROHS3 compliance and REACH unaffected status.

MC78M05ACDTG Features

• Fixed 5V Output: Stable voltage regulation for low-power applications.
• High Input Voltage Tolerance (35V): Accommodates fluctuating input sources.
• 500mA Output Current: Sufficient for powering microcontrollers, sensors, and peripheral ICs.
• Robust Protection: Includes over-temperature shutdown and short-circuit protection for enhanced reliability.
• Low Noise Performance: 80dB PSRR minimizes ripple in sensitive circuits.
• Wide Operating Temperature Range (0°C to 125°C): Suitable for industrial and automotive applications.
• Surface-Mount DPAK Package: Space-efficient and compatible with automated assembly processes.

MC78M05ACDTG Applications

• Embedded Systems: Powering microcontrollers (e.g., Arduino, STM32) and low-power logic circuits.
• Industrial Controls: Voltage regulation for PLCs, motor drivers, and sensor interfaces.
• Automotive Electronics: Auxiliary power supply for infotainment systems and dashboard modules.
• Consumer Electronics: Used in set-top boxes, routers, and portable devices requiring stable 5V rails.
• Legacy Designs: Ideal for maintaining or upgrading older systems where newer alternatives may not be pin-compatible.

Conclusion of MC78M05ACDTG

The MC78M05ACDTG is a proven linear voltage regulator offering a balance of performance, reliability, and simplicity. While newer alternatives may exist, its high PSRR, robust protection features, and wide input range make it a dependable choice for low-to-medium power applications. Engineers working on industrial, automotive, or legacy systems will find it particularly valuable for maintaining stable 5V power rails under varying load conditions. Despite its obsolete status, its ROHS3 compliance ensures it meets modern environmental standards.