onsemi

MC7905ACT

MC7905ACT Description

The MC7905ACT is a fixed-output linear regulator designed for applications requiring a stable -5V supply with a maximum output current of 1A. Manufactured by onsemi, this regulator is part of the Power Management Integrated Circuits (PMIC) category and is housed in a Through Hole TO220AB package. Despite being marked as obsolete, the MC7905ACT remains a reliable choice for its intended applications due to its robust design and performance characteristics.

Key technical specifications include a maximum voltage dropout of 1.3V at 1A (typical), ensuring efficient power conversion even under heavy load conditions. The regulator operates within a temperature range of 0°C to 125°C, making it suitable for a wide range of industrial and commercial environments. Additionally, it features a high Power Supply Rejection Ratio (PSRR) of 70dB at 120Hz, which helps in maintaining output voltage stability against input voltage variations and noise.

The MC7905ACT also includes essential protection features such as over-current and over-temperature protection, safeguarding both the regulator and connected circuits from potential damage. Its moisture sensitivity level (MSL) is rated at 1 (Unlimited), indicating excellent resistance to moisture, which is crucial for reliable performance in humid conditions.

MC7905ACT Features

• Fixed Output Voltage: Provides a stable -5V output, ideal for applications requiring a consistent power supply.
• High Output Current: Capable of delivering up to 1A, suitable for driving multiple devices or high-current applications.
• Low Dropout Voltage: With a maximum dropout voltage of 1.3V at 1A, it ensures efficient power conversion and minimal power loss.
• Wide Operating Temperature Range: Functions reliably between 0°C and 125°C, making it suitable for various environmental conditions.
• High PSRR: A Power Supply Rejection Ratio of 70dB at 120Hz ensures output voltage stability against input voltage fluctuations and noise.
• Protection Features: Over-current and over-temperature protection enhance the reliability and safety of the regulator.
• Moisture Resistance: MSL 1 (Unlimited) rating ensures robust performance in humid environments.
• Through Hole Mounting: The TO220AB package type facilitates easy integration into PCB designs and ensures mechanical stability.

MC7905ACT Applications

The MC7905ACT is well-suited for a variety of applications where a stable -5V supply is required. Some specific use cases include:

• Industrial Control Systems: Provides a reliable power supply for control circuits and sensors.
• Telecommunications Equipment: Ensures stable power for communication modules and interface circuits.
• Medical Devices: Suitable for powering critical components in medical monitoring and diagnostic equipment.
• Automotive Electronics: Ideal for automotive applications requiring a stable -5V supply, such as dashboard electronics and control units.
• General Purpose Electronics: Can be used in a wide range of consumer and commercial electronics that require a stable power source.

Conclusion of MC7905ACT

Despite its obsolete status, the MC7905ACT remains a valuable component for applications requiring a stable -5V supply with a maximum output current of 1A. Its low dropout voltage, high PSRR, and robust protection features make it a reliable choice for various industrial and commercial applications. The wide operating temperature range and moisture resistance further enhance its versatility and reliability. For designers and engineers seeking a dependable linear regulator, the MC7905ACT offers a proven solution with a well-established performance profile.