KA78M24TU

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The KA78M24TU is a three-terminal, adjustable linear voltage regulator designed to provide an output voltage adjustable between 1.25V and 37V with a maximum output current of 1A. It is encapsulated in surface-mount packages designed to meet the requirements of automated flow-soldering process, making it optimal for use in surface-mounted circuit boards. This voltage regulator provides stability with its internal temperature compensation and has features to ensure safe operating area protection. As a three-terminal voltage regulator, the KA78M24TU is a member of the PMIC (Power Management Integrated Circuit) family and more specifically a voltage regulator in its linear category. This article aims to cover the application field as well as the working principle of the KA78M24TU.

In terms of its application field, the KA78M24TU has various applications, making it an extremely versatile voltage regulator. The most common uses for this voltage regulator include: computer systems, power supplies and converters in which low noise, high accuracy and fast transient response are essential to its functioning, robotic applications and automotive systems. This is due to its ability to provide electrical and thermal stability, as well as its low power consumption – making it ideal for many power management applications.

The KA78M24TU provides superior performance thanks to its regulated output voltage, which is adjustable within a range of 1.25V to 37V, making it ideal for many electronics applications. The quiescent current is also extremely low, reducing power consumption in the overall system. The KA78M24TU also offers thermal protection as, in the event that the power dissipated reaches a certain threshold, it will automatically shut down, protecting sensitive components. Additionally, the KA78M24TU features an internal temperature compensation network which increases system stability.

Now, let us discuss the working principle of the KA78M24TU voltage regulator. At its core, the KA78M24TU is a three-terminal, adjustable linear voltage regulator, which utilizes an error amplifier, an output stage, and a pass transistor. The output voltage is determined by the voltage on the adjust pin, with a relationship of​​ Vout = 1.25*(1+ADJ/100). These components work together to control the voltage provided to the load, while also providing protection to the load from short circuits and excessive current.

The working principle of the KA78M24TU begins with the input voltage, which is supplied to the adjust pin. The voltage at the adjust pin is then amplified by the error amplifier and compared to the reference voltage of 1.25V, creating an error signal which is fed to the output stage – this error signal dictates the regulation of the output voltage. The output stage then amplifies the signal and drives the pass transistor. As the input and output resistances of the pass transistor change, the output voltage is regulated accordingly to the output voltage set-point.

In conclusion, the KA78M24TU is a three-terminal adjustable linear voltage regulator which is typically used in applications where low noise, high accuracy and fast transient response are essential. With its adjustable output voltage, adjustable between 1.25V and 37V, and low quiescent current, the KA78M24TU provides excellent performance in power management applications, making it an ideal choice for electronics applications. Its working principle involves the utilization of an error amplifier, output stage and pass transistor, which work together to control the voltage provided to the load and ensure protection to the load from short circuits and excessive current.

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