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Introduction to SPX1587AT-L-3-3 Application Field and Working Principle

The SPX1587AT-L-3-3 is a linear voltage regulator module that is part of the PMIC (Power Management IC) family. It is designed specifically to provide a constant output voltage, regardless of input voltage, while offering high accuracy and stability in the regulated voltage.

Features of the SPX1587AT-L-3-3

• Adjustable output voltage range of 1.5V to 5.5V
• Max input voltage of 16V
• Low ripple and noise
• High output accuracy of ±2%
• Excellent transient response

Applications of the SPX1587AT-L-3-3

The SPX1587AT-L-3-3 voltage regulator can be used in a wide range of applications such as portable electronics, computing, and industrial products. It is well-suited for applications where low noise and high accuracy are required. Some examples include providing power supplies for 4G base stations, portable Bluetooth speakers, and industrial control circuits.

Working Principle of the SPX1587AT-L-3-3

The SPX1587AT-L-3-3 voltage regulator operates using a linear topology. This topology is well-suited to provide a steady output voltage even when the input voltage fluctuates within its specified range. This topology consists of three key components: an error-amplifier, an output-transistor, and a reference-voltage source.

The error-amplifier is used to compare the output-voltage with a reference-voltage. When there is a mismatch between the two voltages, the error-amplifier sends a signal to the output-transistor. The output-transistor then amplifies the signal and adjusts the output voltage accordingly to match the reference voltage. The reference voltage is provided by a dedicated reference-voltage source on the module.

This regulation process continues until the reference-voltage and output-voltage remain in equilibrium. The output-voltage remains steady regardless of any fluctuations in the input-voltage, as long as it remains within the specified range. As the topology is linear, there is less interference from external sources and better efficiency as compared to switch mode regulators.

Conclusion

The SPX1587AT-L-3-3 is a linear voltage regulator module from the PMIC family that is designed for applications requiring high accuracy and low noise. Its adjustable output voltage range of 1.5V to 5.5V and maximum input voltage of 16V make it a good solution for many applications. Its linear topology consisting of an error-amplifier, output-transistor and reference voltage source, provides a steady output voltage even when the input voltage fluctuates within its specified range.

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