MIC5239-2.5YMM

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What is MIC5239-2.5YMM?

MIC5239-2.5YMM stands for Microchip’s Low-Voltage Linear Voltage Regulator in a 2.5V Fixed Output Voltage. It is specifically designed to provide an efficient, low-dropout (LDO) regulator solution for applications powered by a 2.5V source, such as Li-Ion or NiMH batteries, allowing load to draw from the battery up to 1.5A current. The MIC5239-2.5YMM can also be used for alternative applications such as post- regulation for DC/DC converters or as an adjustable voltage source.

Application Field

The MIC5239-2.5YMM is ideal for many battery powered applications, particularly those powered by Li-Ion and NiMH batteries, due to its ability to deliver extremely low dropout volts while also providing up to 1.5A of current. It is also suitable when used as an adjustable voltage source, able to function at outputs of 1.8V to 2.6V with precision 0.1V steps. Other potential applications include providing post-regulation for DC/DC converters, and providing voltage regulation for consumer electronics – such as basic mobile phones, handheld games devices and various audio products – or industrial equipment.

Working Principle

The MIC5239-2.5YMM is specifically designed for low-voltage linear regulation. It is able to provide an excellent regulation performance for 2.5V sources, such as Li-Ion and NiMH batteries, with a very low dropout voltage and up to 1.5A current. It is also able to provide good transient response and fast loading capabilities. The internal architecture utilizes bipolar transistors to limit current draw from the source.

The MIC5239-2.5YMM features a built-in minimum output current level, also known as quiescent current, which is typically 5µA at full load, reducing power consumption in low-load conditions. The device also features an additional stability pin to improve output voltage regulation. The functionality of the stability pin can be further improved through different combinations of external components.

For noise sensitive applications, the MIC5239-2.5YMM features an adjustable soft-start control. This limits the inrush current during voltage transitions and reduces ringing on the output. It also prevents any large currents from external noise coupled through the input source.

Besides providing high quality voltage regulation and protection, it is also important to consider the protection and monitoring capability of the regulator. The MIC5239-2.5YMM has several integrated protection measures, such as input under-voltage lockout, thermal shutdown and overload protection, to guarantee that the regulator is safely operated under all conditions.

Conclusion

The MIC5239-2.5YMM is an excellent choice for a wide range of low-voltage linear voltage regulator needs, providing up to 1.5A current and efficient, low-dropout regulation to applications powered by a 2.5V source. Its internal architecture, with integrated protection measures and adjustable soft-start control, ensure safe and reliable operation under all conditions.

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