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MC7808CT

MC7808CT Description

The MC7808CT from onsemi is a fixed-output +8V linear voltage regulator designed to deliver up to 1A of continuous output current with an input voltage range up to 35V. Housed in a TO-220AB package, this obsolete but robust component remains relevant for legacy designs requiring stable, low-noise voltage regulation. It features over-temperature and short-circuit protection, ensuring reliable operation under harsh conditions. With a typical dropout voltage of 2V at 1A and a quiescent current of 8mA, the MC7808CT balances efficiency and performance, making it suitable for a wide range of industrial and consumer applications.

MC7808CT Features

• Fixed +8V Output: Precision-regulated voltage for consistent performance.
• High Input Voltage Tolerance: Supports up to 35V, accommodating fluctuating input sources.
• 1A Output Current: Capable of driving moderate loads without external pass transistors.
• Built-in Protections: Over-temperature shutdown and short-circuit protection enhance system reliability.
• Low Noise & High PSRR: 62dB PSRR at 120Hz minimizes ripple, ideal for noise-sensitive analog circuits.
• Wide Operating Temperature Range: 0°C to 125°C ensures functionality in demanding environments.
• Through-Hole Mounting: TO-220AB package simplifies heatsinking and mechanical integration.

MC7808CT Applications

• Industrial Power Supplies: Stable voltage for control systems, sensors, and actuators.
• Consumer Electronics: Voltage regulation in audio amplifiers, set-top boxes, and legacy devices.
• Automotive Aftermarket: Auxiliary power for infotainment or lighting systems (within temperature limits).
• Embedded Systems: Reliable power for microcontrollers, FPGAs, and peripheral circuits.
• Test & Measurement Equipment: Low-noise rails for precision analog/digital instrumentation.

Conclusion of MC7808CT

While marked obsolete, the MC7808CT remains a dependable choice for designs requiring a simple, high-current 8V linear regulator. Its robust protection features, wide input range, and low-noise output make it ideal for legacy upgrades or applications where switching regulators are impractical. Engineers valuing ease of use, thermal resilience, and proven performance will find this regulator a pragmatic solution despite its discontinued status. For new designs, consider verifying alternative options or stock availability.