MIC37138-2.5YS-TR

Power management integrated circuits (PMICs) are an essential component in modern electronics, responsible for regulating and delivering power to the components in an electronic system. Voltage regulators, linear or otherwise, are a subset of PMICs designed to regulate the output voltage of a power supply, ensuring that it stays within acceptable parameters despite variations in input voltage, temperature, or load. One example of a linear voltage regulator is the MIC37138-2.5YS-TR, part of the MIC3710X family of ICs from Micrel.

MIC37138-2.5YS-TR Application Fields

The MIC37138-2.5YS-TR is a micropower, low dropout linear regulator designed to provide a regulated output voltage of 2.5V. It is intended for use in battery-powered communication and computing devices, such as mobile phones, digital cameras, tablets, and other portable consumer electronic devices. Its low quiescent current of just 10 μA allows it to operate for extended periods of time on small, battery-powered devices, ensuring the power delivery reliability needed in modern handheld applications.

The IC features an output voltage tolerance of ±2%, eliminating the need for external voltage adjustments, integration of voltage reference circuitry, or other costly measures. It also has three control pins (EN, POUT, and SLEEP) that allow the user to shut it down, and thus minimize power consumption when it is not in use. Addtionally, the MIC37138-2.5YS-TR is designed to work with a wide range of input voltages, with a minimum voltage of 2.7V and a maximum of 5.5V.

MIC37138-2.5YS-TR Working Principle

At the heart of the MIC37138-2.5YS-TR is its output voltage regulator, which works by using an internal voltage reference to compare the input and output voltages, and then adjusting the reference voltage accordingly. As the output voltage increases, the voltage reference also increases, which in turn causes the output voltage to decrease. This creates a feedback loop that helps to ensure that the output voltage remains within the specified range.

The output voltage regulator is further bolstered by a current limiting circuit, designed to protect the device against overcurrent conditions. This circuit operates by monitoring the amount of current flowing through the IC, and if it exceeds a certain threshold, it will shut down the device to protect it from damage.

In addition, the MIC37138-2.5YS-TR has several internal safety features. One of these is its thermal protection circuit, which works by detecting the output current temperature and shutting down the device if the temperature gets too high. Furthermore, the device also features built-in reverse-current blocking, which helps to protect the device from backflow of current.

Conclusion

The MIC37138-2.5YS-TR is a micropower, low dropout linear voltage regulator intended for use in battery-powered communication and computing devices. It is designed with a minimum input voltage of 2.7V and a maximum of 5.5V, with an output voltage tolerance of ±2%. Additionally, it has several control pins, as well as internal current limiting, thermal protection, and reverse-blocking circuits, to ensure reliable performance in a wide range of applications.