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MC78M05BDT

MC78M05BDT Description

The MC78M05BDT from onsemi is a fixed-output linear voltage regulator designed to deliver a stable 5V output with a maximum input voltage of 35V and an output current capability of 500mA. Housed in a DPAK (TO-252) surface-mount package, this regulator is optimized for compact PCB designs while ensuring reliable performance. Although marked as obsolete, it remains a robust choice for legacy systems due to its high 80dB PSRR (120Hz), ensuring excellent noise suppression in sensitive applications. The device features over-temperature and short-circuit protection, enhancing system durability under fault conditions.

MC78M05BDT Features

• Fixed 5V Output: Ensures precision voltage regulation for low-power circuits.
• High Input Voltage Tolerance (35V): Suitable for automotive and industrial environments with fluctuating supply voltages.
• 500mA Output Current: Adequate for powering microcontrollers, sensors, and small peripherals.
• Surface-Mount DPAK Package: Ideal for space-constrained designs with efficient thermal dissipation.
• Robust Protection: Includes thermal shutdown and short-circuit protection for enhanced reliability.
• Low Noise Performance: 80dB PSRR minimizes ripple in noise-sensitive applications.
• REACH Unaffected: Compliant with environmental regulations, ensuring broader usability.

MC78M05BDT Applications

This regulator excels in systems requiring stable, low-noise 5V power, such as:

• Embedded Systems: Powering microcontrollers (e.g., Arduino, Raspberry Pi peripherals).
• Automotive Electronics: Voltage stabilization in infotainment or sensor modules.
• Industrial Control Systems: Reliable supply for PLCs, sensors, and actuators.
• Consumer Electronics: Used in set-top boxes, routers, and low-power devices.
• Legacy Equipment Maintenance: Suitable for repairs or upgrades of older systems.

Conclusion of MC78M05BDT

The MC78M05BDT is a dependable linear regulator offering high voltage tolerance, robust protection, and low-noise output, making it ideal for industrial, automotive, and embedded applications. While obsolete, its DPAK package and 500mA current capability ensure compatibility with demanding designs. Engineers seeking a proven 5V regulator with thermal and short-circuit safeguards will find this device a pragmatic choice, particularly in legacy or cost-sensitive projects.