onsemi

MC7805BD2TR4

MC7805BD2TR4 Description

The MC7805BD2TR4 from onsemi is a fixed-output, positive-voltage linear regulator designed to deliver a stable 5V output at up to 1A of continuous current. With a wide input voltage range of up to 35V, this regulator is engineered for robustness in demanding applications. It features a low dropout voltage of 2V (typical) at 1A, ensuring efficient operation even with marginal input voltages. The device is housed in a D2PAK (TO-263) surface-mount package, making it suitable for high-power PCB designs. Although marked as obsolete, it remains a reliable choice for legacy systems due to its proven performance and REACH compliance.

MC7805BD2TR4 Features

• Fixed 5V Output: Ensures consistent voltage regulation without external adjustments.
• High Input Voltage Tolerance (35V): Suitable for industrial and automotive environments with fluctuating power supplies.
• Over-Temperature and Short-Circuit Protection: Enhances reliability under fault conditions.
• Low Quiescent Current (8 mA): Minimizes power loss in standby modes.
• High PSRR (68dB at 120Hz): Effectively suppresses input ripple, ideal for noise-sensitive applications.
• Surface-Mount D2PAK Package: Optimized for thermal performance and high-current PCB layouts.

MC7805BD2TR4 Applications

This regulator excels in systems requiring stable 5V power rails, such as:

• Industrial Control Systems: Powering microcontrollers, sensors, and logic circuits.
• Automotive Electronics: Voltage stabilization for infotainment or dashboard modules.
• Consumer Electronics: Reliable power for set-top boxes, routers, and legacy devices.
• Embedded Systems: Low-noise supply for analog/digital hybrid designs.

Conclusion of MC7805BD2TR4

The MC7805BD2TR4 stands out for its high input tolerance, robust protection features, and excellent ripple rejection, making it a dependable choice for 5V regulation in harsh environments. While newer alternatives exist, its proven durability and thermal performance ensure continued relevance in legacy and high-reliability applications. Designers should evaluate replacement options for future-proofing but can rely on this regulator for existing designs requiring uncompromising stability.