SG7905K-883B

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The SG7905K-883B is a linear voltage regulator that belongs to the PMIC (power management integrated circuit) family. It is designed to provide a stabilized voltage control for electrical and electronic systems. It is essential for providing the highest performance and reliability to a variety of applications, including medical equipment, optical instrumentation, telecommunications, and industrial automation. This article will discuss the application field and working principle of the SG7905K-883B.

Application Field

The SG7905K-883B is a high-precision, low-dropout voltage regulator that can be used in a wide range of applications. It features low output noise and ultra-low output noise during low power modes, which makes it suitable for applications in medical, optical, telecommunications, and industrial automation fields. The voltage regulator is also highly efficient, resulting in lower power consumption. Additionally, its fast start-up time makes it suitable for quick wake up applications.

The SG7905K-883B is designed to work with a wide input voltage range, from 0V to 42V. The maximum output current is 500mA, though this can be adjusted to meet the specific requirements of the application. The SG7905K-883B also features short-circuit, over-temperature, and overload protections.

Working Principle

The SG7905K-883B is a linear voltage regulator that uses a linear negative feedback circuit to maintain the desired output voltage. The voltage regulator includes an operational amplifier that compares the output voltage with a fixed reference voltage and provides the feedback signal to the control circuitry. The control circuitry then modifies the error amplifier\'s output signal to bias the control transistor, in order to correct any variations in the output voltage.

The control transistor acts as a variable current source or sink, which is used to regulate the output voltage. When the output voltage is greater than the reference voltage, the current is limited in order to reduce the output voltage. Conversely, if the output voltage is lower than the reference voltage, the current is increased to raise the output voltage. This feedback loop ensures that the output voltage remains stable.

The SG7905K-883B also uses a sophisticated temperature compensation circuit to provide improved accuracy. This temperature compensation circuit senses the ambient temperature and adjusts the reference voltage of the operational amplifier accordingly, ensuring that the output voltage remains stable even when the temperature changes.

Conclusion

The SG7905K-883B is a linear voltage regulator that belongs to the PMIC family. It is designed to provide a stabilized voltage control for electrical and electronic systems. It features low output noise, ultra-low noise during low power modes, wide input voltage range, and temperature compensation, making it suitable for a wide range of applications. The SG7905K-883B is based on a linear negative feedback circuit, whose control transistor acts as a variable current source or sink, in order to regulate the output voltage.

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