onsemi

MC78M05CDT  

Linear & Switching Voltage Regulators

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.

MC78M05CDT Documents

Download datasheets and manufacturer documentation for MC78M05CDT