MIC2954-08YM-TR

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MIC2954-08YM-TR is a voltage regulator which falls under the category of linear voltage regulator in the power management Integrated Circuit (PMIC) family. It comes with the output voltage range of 0.8V to 5.5V, enabling it to be used in a plethora of applications. Its small size, low power consumption, and wide input voltage range make it a preferable device among the professionals. This article will discuss the application field and working principle of MIC2954-08YM-TR.

Application Fields

MIC2954-08YM-TR provides extreme flexibility of applications due to its wide input voltage range, efficient design and low quiescent current. It has a wide variety of applications ranging from cell phones, laptops and PDAs to automotive, battery powered device and medical equipment applications.

The most common applications of MIC2954-08YM-TR include providing a regulated voltage that can be used to charge the battery voltage in a variety of portable devices. It is also used in automotive applications to regulate the vehicular power system and in medical devices to power the system components. Other applications of this device include powering the sensors, microcontrollers, and voltage references in industrial control systems.

Features

The MIC2954-08YM-TR has a wide input voltage from 1.2V to 9.0V, allowing it to operate in a variety of input voltage sources. It also has a minimum dropout voltage of 0.3V, giving it higher efficiencies compared to other voltage regulators. The output voltage is adjustable from 0.8V to 5.5V, ensuring it can be used in the various applications. The device also has a low quiescent current of 20μA, limiting the power consumption of the system. In addition, it features under-voltage lockout, overtemperature protection, and an advanced high frequency current limit.

Functional Principle

The basic working principle of MIC2954-08YM-TR is similar to other linear voltage regulators. It takes input voltage, which typically varies on a wide range and provides a constant regulated voltage at the output. In order to do this, it consists of two stages: voltage reference and error amplifier.

In its voltage referencing stage, it uses a comparator which continuously compares the output voltage to a reference voltage. This reference voltage is provided by an internal bandgap reference circuit typically at 1.24V. For example, if the regulated output voltage is set to 5V, the output of the comparator should maintain a voltage difference of 3.76V between the output voltage and the reference voltage.

In the next stage or the error amplifier, it amplifies the small output of the comparator. This amplified error signal is then used to adjust the duty cycle of the onboard switch in such a way that the output voltage remains constant over the wide range of input voltages. This thus ensures that a constant regulated voltage is maintained even when the input voltage varies.

Conclusion

The MIC2954-08YM-TR is a highly efficient and flexible voltage controller. Its wide input voltage range coupled with its adjustable output voltage, low quiescent current, and high frequency current limit make it suitable for use in a variety of applications ranging from automotive to medical. This article discussed the features and working principle of MIC2954-08YM-TR.

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