MC7805ACTG

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Voltage regulators are an important component in many electronic circuits as they are designed to provide a consistent voltage even when supplied with a varying input voltage. The MC7805ACTG linear voltage regulator is one of the most common regulators used in many applications. In this article, we’ll take a look at the application fields for this component and its working principle.

Application Fields

The MC7805ACTG is predominantly used in applications that require an output voltage of 5V. It is ideal for powering many microcontrollers and other components with static power supplies, providing stability to the outputs. Other microprocessor applications that require low power, also benefit from its use.

In automotive applications, the MC7805ACTG is used for input protection of ECUs against overvoltage and reverse polarity. It is also commonly used in applications such as low current LED lighting, voltage monitoring and supervisory circuits, general electronics and precision circuits.

Due to its low-cost and small size, the MC7805ACTG is a popular choice among electronic hobbyists and DIY enthusiasts. It is in fact, one of the most widely used voltage regulators among those who develop microcontroller-based projects such as robotic motion, home automation, embedded applications and more.

Working Principle

The MC7805ACTG operates in the linear voltage regulator mode, meaning it is not a switching regulator. This means it has a very simple topology, and due to its low cost and reliable performance, is used in many designs.

It is a monolithic integrated circuit (IC) consisting of three main parts – an internal power transistor, an error amplifier and a reference voltage. The input voltage is applied to the base of the power transistor, causing it to either increase or decrease the energy coming from the collector to provide the desired output voltage. The voltage is then regulated by the error amplifier, which monitors the output voltage and compares it with the reference voltage. If the output voltage is different from the reference voltage, it sends a signal to the db to change or maintain the current flow.

The MC7805ACTG also has a thermal overload protection, which shuts down the IC if the temperature gets too high, preventing any physical damage. This protection shuts off the output if the temperature rises above 150°C.

Overall, the MC7805ACTG is an inexpensive and reliable voltage regulator, making it a popular choice for many applications. Its low cost, high performance and small size, make it an attractive option for hobbyists and DIYers.

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