onsemi Tariff Inquiry

MC78M05CDT

MC78M05CDT Description

The MC78M05CDT is a fixed-output linear voltage regulator from onsemi, designed to deliver a stable 5V output at up to 500mA of continuous current. With a wide input voltage range of up to 35V, this regulator is well-suited for applications requiring reliable voltage conversion from higher input sources. Housed in a DPAK (TO-252) surface-mount package, it offers efficient thermal dissipation and compact PCB integration. Although marked as obsolete, it remains a robust choice for legacy designs or systems where proven performance is prioritized. The device operates across a temperature range of 0°C to 125°C, ensuring stability in demanding environments.

MC78M05CDT Features

• Fixed 5V Output: Precision-regulated output voltage, ideal for powering low-voltage digital and analog circuits.
• High Input Voltage Tolerance: Supports inputs up to 35V, accommodating unregulated power sources like batteries or AC adapters.
• Over-Temperature and Short-Circuit Protection: Built-in safeguards enhance reliability in fault conditions.
• Low Dropout and High PSRR: 80dB PSRR (120Hz) minimizes noise, making it suitable for sensitive applications.
• Surface-Mount DPAK Package: Optimized for thermal performance and space-constrained designs.
• Wide Operating Temperature Range: Functions reliably in industrial and automotive environments (0°C to 125°C).

MC78M05CDT Applications

The MC78M05CDT is ideal for:

• Embedded Systems: Powering microcontrollers, sensors, and logic circuits in industrial control systems.
• Automotive Electronics: Voltage regulation for infotainment, dashboard modules, and low-power ECUs.
• Consumer Electronics: Stabilizing voltage in set-top boxes, routers, and peripheral devices.
• Legacy Equipment Maintenance: Replacing obsolete regulators in existing designs without redesigns.
• Noise-Sensitive Analog Circuits: Audio amplifiers or measurement systems benefiting from high PSRR.

Conclusion of MC78M05CDT

The MC78M05CDT is a dependable linear regulator offering a balance of high input tolerance, thermal protection, and noise suppression. While obsolete, its rugged design and 500mA output capability make it a pragmatic choice for legacy systems or cost-sensitive projects. Engineers valuing simplicity, durability, and proven performance will find it a viable solution for 5V power management across industrial, automotive, and consumer applications. For new designs, consider modern alternatives with improved efficiency or additional features.