S-1155B50-U5T1U

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The S-1155B50-U5T1U is a linear voltage regulator designed for use in industrial, medical, automotive, and consumer applications. It is a low-dropout (LDO) regulator that provides up to 5.0V output with a wide input range of 2.5 to 10V.

Applications

The S-1155B50-U5T1U is a voltage regulator designed for use in industrial, medical, automotive, and consumer applications where low-noise, low-dropout, and low-temperature operation are of primary importance. It is well suited for applications in a variety of sensitive electronics systems, including medical imaging systems, portable instrumentation, automotive electronics, as well as computers and other general-purpose electronics. It is also suitable for applications requiring programmable voltage outputs or high-efficiency operation. In addition, the device is resistant to reverse battery or inrush current and features current limiting, making it very reliable and robust.

Working Principle

The S-1155B50-U5T1U operates as a linear voltage regulator, maintaining a constant output voltage by dissipating excess power between input and output terminals. It achieves this by comparing the feedback voltage with a reference voltage, creating a difference between its input and output terminals. If the input voltage is greater than the output voltage, the error amplifier in the regulator controls the P-channel MOSFET to operate as an ideal diode, dissipating power and thereby regulating the output voltage. Conversely, if the input voltage is lower than the output voltage, the MOSFET will not conduct and the output voltage will remain constant.

The S-1155B50-U5T1U also has a temperature protection feature which limits the power dissipation that occurs when the junction temperature exceeds ~110°C, as well as an overload protection circuit that shuts down the output if the load current exceeds safe operation limits. Other features of the device include adjustable soft start, short-circuit current limiting and UVLO protection.

Conclusion

The S-1155B50-U5T1U is a linear voltage regulator that provides up to 5.0V output with a wide input range of 2.5 to 10V. It is well suited for industrial, medical, automotive, and consumer applications that require low-noise, low-dropout, and low-temperature operation. The device is equipped with many safety features such as temperature protection, overload protection and user adjustable soft start, making it highly reliable and robust. Overall, the S-1155B50-U5T1U is a reliable and efficient voltage regulator for a variety of applications.

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