onsemi

MC7809CT

MC7809CT Description

The MC7809CT is a linear voltage regulator IC from onsemi, specifically designed for applications requiring a fixed output voltage of 9V with a maximum input voltage of 35V. This single-output regulator is housed in a through-hole TO220AB package, making it suitable for a variety of electronic systems. With a maximum output current of 1A, the MC7809CT is ideal for low to medium power applications. It is important to note that this product is currently classified as obsolete, which means it may be challenging to source new units and may not be supported with future updates or replacements.

MC7809CT Features

• Fixed Output Voltage: The MC7809CT provides a stable 9V output, making it suitable for applications where a fixed voltage is required.
• High Input Voltage Tolerance: Capable of handling input voltages up to 35V, this regulator is well-suited for systems with varying power supply conditions.
• 1A Output Current: The MC7809CT can deliver up to 1A of output current, sufficient for many low to medium power applications.
• Positive Output Configuration: This configuration is ideal for applications that require a positive voltage reference.
• Over Temperature and Short Circuit Protection: These built-in protection features help safeguard the device and the system it is part of from potential damage.
• Low Quiescent Current: With a quiescent current of only 8mA, the MC7809CT contributes minimally to overall system power consumption.
• High PSRR: A power supply rejection ratio of 61dB at 120Hz ensures stable operation even in the presence of noisy power supplies.

MC7809CT Applications

The MC7809CT is well-suited for a variety of applications where a stable 9V output is required, such as:

• Battery-powered devices: Providing a stable voltage source for low-power electronics.
• Industrial control systems: Offering a reliable voltage reference in environments with fluctuating power conditions.
• Audio and video equipment: Ensuring consistent performance in devices that require a stable power supply.

Conclusion of MC7809CT

While the MC7809CT offers a range of features that make it suitable for various low to medium power applications, its obsolete status means that users may need to consider alternative solutions for new designs. For existing systems that rely on this regulator, it remains a reliable choice for providing a stable 9V output with built-in protection features. However, due to its obsolescence, it is recommended to explore modern alternatives that offer similar performance with the added benefits of ongoing support and availability.