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PMIC - Voltage Regulators - Linear

Linear voltage regulators are among the most common types of voltage regulators used in today’s applications. Linear regulators are used to maintain a steady output voltage, while at the same time providing good efficiency and low cost. The KA7905 series of linear adjustable voltage regulators is a popular choice for many applications. This article will discuss the application field and working principle of the KA7905.

Applications

The KA7905 is a voltage regulator which can be used in a wide range of applications, from small industrial products to larger scale computer applications. It is commonly used in automotive applications, voltage stabilizers, power supplies, and power conversion circuits in many electronic devices. Additionally, the KA7905 is also widely used for powering transistors and digital circuits such as logic gates. This versatile voltage regulator is an ideal choice for any application that requires precise voltage regulation.

Working Principle

The KA7905 is a linear voltage regulator, meaning that it works on the principle of negative feedback. This means that the regulator monitors the output voltage, and then adjusts the variable control voltage to compensate for any difference between the actual and the desired output voltages. The linear regulator compares the output voltage to a reference voltage, which is typically set by a voltage-divider network. If the output voltage is too low, the regulator increases the output voltage, and vice versa. The regulation process oscillates around the desired output voltage, and this oscillation is known as “line regulation.”

The KA7905 is an adjustable voltage regulator, meaning that the output voltage is adjustable according to the control voltage applied to the V control pin. The output voltage range of the KA7905 is adjustable from 1.25V to 14V, depending on the reference voltage applied to the REF pin. In order to maintain the desired voltage, some current is drawn from the load, thus ensuring that the output voltage remains stable and keep away from the danger of over-voltage.

Conclusion

The KA7905 is a linear adjustable voltage regulator widely used in a variety of applications. It is capable of providing precise and stable output voltages, and can be adjusted according to the desired reference voltage. Additionally, the KA7905 is cost-effective, easy to install, and provides good efficiency for the power being supplied. For these reasons, the KA7905 is an ideal choice for many applications where stable and accurate voltage regulation is required.

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