LD39080PT-R

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The LD39080PT-R is a high-performance linear voltage regulator with low drop out voltage and a variety of protecting functions. It is widely used in various fields such as industrial control, communication, security, automotive and other electronic applications. This article describes its application field and working principle.

Application Field

Linear voltage regulators, including the LD39080PT-R, are widely used in a variety of applications including industrial control, communication, security, automotive and other electronic applications. In such applications, reliable voltage power supplies are essential. The LD39080PT-R linear regulator is particularly suited for high-end products with its low drop-out voltage and fast response time.

Industrial control applications often require sophisticated voltage regulation and protection features. The LD39080PT-R linear voltage regulator features protection functions overvoltage, overcurrent and short-circuit protection, as well as resistor adjustability to precisely adjust voltage output. It is also capable of driving up to 5A of output current for short periods of time.

The LD39080PT-R is also used in communication applications, due to its high output voltage accuracy, quick response time and long-term stability. In addition, it provides protection against overvoltage, overcurrent and short-circuit conditions. As a result, it is capable of withstanding harsh conditions, ensuring the reliability of your system.

In security and automotive applications, the LD39080PT-R is used for its high accuracy and extremely low temperature coefficient. It is also capable of operating at very low drop-out voltage and is equipped with a variety of protection features, such as overvoltage, overcurrent, and short-circuit protection.

The LD39080PT-R linear voltage regulator is also suitable for other electronic applications. For example, it can be used to power LCD displays and audio equipment, as it delivers stable and reliable power with a high ripple rejection ratio.

Working Principle

The LD39080PT-R is a high performance linear voltage regulator with low dropout voltage and a variety of protections, specifically suited for various kinds of demanding applications. The working principle is based on a voltage reference and error amplifier configuration, where the error amplifier drives an N-Channel MOSFET for current regulation. The succeeding low-pass filter filters out the MOSFET switching components and any input electrical noise.

The voltage reference sets the output voltage and provides a voltage accuracy of 0.3%. This is adjusted by the external resistor divider connected to the reference pin. The error amplifier senses the output voltage between the voltage adjust pin and ground, and amplifies the difference to drive the MOSFET.

The integrated output transistor is capable of sourcing up to 7A of current with a low on-resistance of 0.2 Ω, drawing current from the input voltage and supplying the desired output voltage. The output voltage is also monitored by a comparator, which senses the output voltage of the error amplifier and provides protection against overvoltage and overcurrent conditions.

The LD39080PT-R is protected against reverse input voltage, reverse current flow, thermal shutdown, and short circuit conditions. As such, it is capable of withstanding harsh conditions, ensuring the reliability and long term stability of your system.

Conclusion

The LD39080PT-R is a high-performance linear voltage regulator with low dropout voltage and a variety of protecting functions. It is used in a variety of applications, such as industrial control, communication, security, automotive and other electronic applications. Its working principle is based on a voltage reference and error amplifier configuration, and it is protected against overvoltage, overcurrent, thermal shutdown and short circuit conditions. As a result, it is capable of withstanding harsh conditions, ensuring the reliability of your system.

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