onsemi

MC7805ABD2T

MC7805ABD2T Description

The MC7805ABD2T from onsemi is a fixed-output linear voltage regulator designed to deliver a stable 5V output at up to 1A current. With a maximum input voltage of 35V, it is well-suited for applications requiring voltage step-down from higher sources. This positive-output regulator integrates critical protection features, including over-temperature and short-circuit protection, ensuring robust operation in demanding environments. Packaged in a D2PAK (TO-263) surface-mount form factor, it offers efficient thermal dissipation, making it ideal for high-power applications. Although marked as obsolete, its proven reliability and performance continue to make it a viable choice for legacy designs.

MC7805ABD2T Features

• Fixed 5V Output: Ensures precise voltage regulation without external adjustments.
• High Input Voltage Tolerance (35V): Supports a wide range of input sources.
• Low Dropout Voltage (2V @ 1A): Minimizes power loss and improves efficiency.
• High PSRR (83dB @ 120Hz): Excellent noise suppression for sensitive circuits.
• Thermal & Short-Circuit Protection: Enhances durability and system safety.
• Low Quiescent Current (6mA): Reduces power consumption in standby modes.
• MSL 1 (Unlimited): No moisture sensitivity concerns during storage or assembly.

MC7805ABD2T Applications

The MC7805ABD2T is ideal for power supply regulation in industrial, automotive, and consumer electronics, including:

• Embedded Systems: Microcontroller and logic circuit power stabilization.
• Automotive Electronics: Infotainment systems and sensor modules.
• Industrial Controls: PLCs, motor drivers, and instrumentation.
• Consumer Devices: Set-top boxes, routers, and audio amplifiers.
  Its high PSRR makes it particularly effective in noise-sensitive analog circuits, while its robust protection features suit harsh operating conditions.

Conclusion of MC7805ABD2T

The MC7805ABD2T remains a dependable choice for 5V power regulation, combining high efficiency, reliability, and protection in a compact package. While newer alternatives may exist, its proven performance in noise reduction, thermal management, and fault tolerance ensures continued relevance in legacy and cost-sensitive designs. Engineers seeking a simple, robust linear regulator for medium-power applications will find this component a practical solution.