AS78L05CZTR-G1

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The AS78L05CZTR-G1 is a three-terminal low-dropout (LDO) voltage regulator for personal electronics, portable devices, and embedded systems that utilize low quiescent current, low temperature coefficient, and low output transients. Even when the input voltage or load are varied, the output voltage remains constant within a specific range, thereby providing a high level of output accuracy. It is the perfect voltage regulator for applications such as digital circuits and analog circuits that need optimal power supply stability over a wide temperature range and low cost linear power regulation.

Working Principle

The AS78L05CZTR-G1 is designed with a low-impedance circuit structure in order to realize low-dropout (LDO) performance and low output noise. It is composed of an internal voltage reference, an error amplifier, a low-impedance NPN bipolar transistor and a driver transistor.

When power is supplied to the regulator, the voltage reference establishes the output voltage at its internal reference voltage. The error amplifier amplifies the difference between the internal reference voltage and the output voltage. When the output voltage is lower than the reference voltage, the current amplifier will drive the bipolar NPN transistor to sink the current from the load and keep the output voltage within a certain range. The NPN current amplifier operates within a negative feedback loop and will continue to drive the output voltage to the predetermined value.

Application Field

The AS78L05CZTR-G1 is ideally suited for a wide range of applications, such as digital audio players, camcorders, digital cameras, disk drives, and any other devices that require a low-dropout voltage regulator. It offers a high level of output accuracy and low output noise, making it a great choice for processes such as power management, data acquisition, and battery management. One of its most valuable features is its low quiescent current, making it an excellent option for embedded systems as well.

The AS78L05CZTR-G1 can regulate the output voltage up to 6.0V, which eliminates the need for a separate power supply voltage. Its wide input voltage range and low quiescent current make it an ideal solution for applications requiring fast startup, minimal power consumption, and low output voltage fluctuations. It is a standard part that is reliable and easy to use, making it a popular choice for a wide range of applications.

Conclusion

The AS78L05CZTR-G1 is a three-terminal low-dropout (LDO) voltage regulator for personal electronics, portable devices, and embedded systems. It is designed with a low-impedance circuit structure in order to realize low-dropout performance and low output noise. It offers a wide voltage range, low quiescent current, high output accuracy, minimal power consumption, and low output voltage fluctuations. It is perfect for a wide range of applications such as digital audio players, camcorders, digital cameras, disk drives, and any other devices that require a low-dropout voltage regulator.

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