onsemi

MC78M08BDTG

MC78M08BDTG Description

The MC78M08BDTG from onsemi is a fixed-output linear voltage regulator designed to deliver a stable 8V output at up to 500mA of continuous current. Housed in a DPAK (TO-252) surface-mount package, this obsolete but reliable component is optimized for applications requiring robust voltage regulation with minimal external components. With an input voltage range up to 35V, it offers a simple, cost-effective solution for step-down voltage conversion. The device features over-temperature and short-circuit protection, ensuring safe operation under fault conditions. Its 80dB PSRR (120Hz) minimizes noise, making it suitable for sensitive analog or digital circuits.

MC78M08BDTG Features

• Fixed 8V Output: Precision-regulated voltage with ±4% tolerance.
• High Input Voltage (35V Max): Supports wide input ranges for versatile applications.
• 500mA Output Current: Sufficient for low-to-medium power loads.
• Protection Mechanisms: Built-in over-temperature shutdown and short-circuit protection enhance reliability.
• Low Noise Performance: 80dB PSRR at 120Hz reduces ripple in power-sensitive designs.
• Surface-Mount DPAK Package: Compact footprint for space-constrained PCB layouts.
• RoHS3 & REACH Compliant: Meets environmental and safety standards.

MC78M08BDTG Applications

Ideal for industrial, automotive, and consumer electronics, the MC78M08BDTG excels in:

• Power Supplies: Secondary regulation in AC/DC or DC/DC systems.
• Embedded Systems: Voltage stabilization for microcontrollers, sensors, and peripherals.
• Automotive Electronics: Auxiliary power for infotainment or lighting systems (within non-critical domains).
• Test & Measurement Equipment: Clean voltage rails for precision analog circuits.
• Legacy Designs: Cost-effective replacement or maintenance in obsolete systems.

Conclusion of MC78M08BDTG

While marked obsolete, the MC78M08BDTG remains a practical choice for designs requiring a simple, rugged 8V regulator with proven performance. Its high PSRR, robust protections, and DPAK packaging make it suitable for noise-sensitive or space-limited applications. Engineers should evaluate alternative modern regulators for new designs but can leverage this IC for legacy repairs or low-complexity power solutions.