LDK130M08R

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The linear voltage regulator, combining simple and robust design with few external components, is one of the most popular design options available to engineers today. In this article, we will discuss the LDK130M08R application field and working principle among the linear voltage regulator category.

First, let’s discuss the application field of the LDK130M08R. This particular voltage regulator is suited for applications that require an input voltage ranging between 7V to 40V DC, and an output voltage ranging between 0.8V to 18V DC. It is mainly intended for powering low profile boards. Its small footprint allows for easy mounting in narrow places and it features improved energy efficiency compared to its predecessors. This makes it highly attractive for use in automotive, industrial, and telecommunications applications, such as vehicle battery charging, LED lighting, laptop chargers, and telecom base station power conditioning.

Next, let’s look at the working principle. The LDK130M08R functions as a three terminal negative voltage regulator, with an input voltage supplied at the first terminal, and an output voltage available between the second and third terminals. There is a voltage reference, or reference voltage, between these two terminals, which will remain constant even when the input voltage changes. This voltage reference is typically set to a slightly lower voltage than what is needed for the output voltage. This voltage drop across the transfer resistor is then amplified by an error amplifier and fed to an output stage, which adjusts the output voltage accordingly. An adjustable load connected between the output and ground terminals makes it possible to adjust the output voltage and current level.

The LDK130M08R also features thermal protection, which ensures that it does not overheat and jeopardize the longevity of the device. This protection is achieved through a temperature sensing circuit and a transistor, which will shut off the amplifier circuit when the device reaches a threshold temperature. This temperature sensing circuit is adjustable, allowing the user to adjust it according to the specific requirements of the application.

Overall, the LDK130M08R linear voltage regulator is a great choice for applications that require an input voltage between 7V and 40V DC, and an output voltage between 0.8V and 18V DC. It is also highly efficient, making it well suited for a wide variety of automotive, industrial, and telecommunications applications. Finally, it has built-in thermal protection, ensuring that it does not get overheated and potentially damage other components.

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