MIC3975-1.65BMM-TR

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Power Management Integrated Circuit (PMIC) is an integrated circuit (IC) in a computer system, which is responsible for regulating local electric power. Voltage regulators are an important part of a power manager IC, as they help to regulate voltage into different sections of a circuit, thereby enabling improved control of the circuit and power consumption. Linear voltage regulators are particularly useful in applications that require low noise, high stability and good accuracy. The MIC3975-1.65BMM-TR is a linear voltage regulator that is intended for use in a wide range of applications.

Overview of MIC3975-1.65BMM-TR

The MIC3975-1.65BMM-TR is a very low drop-out, wide input voltage linear regulator with 1.5A (150mA minimum) and ±0.75% maximum output accuracy. This voltage regulator has a wide input voltage range of 6V to 42V and an output voltage range of 1.2V to 6V, which allows it to support various applications.

The MIC3975-1.65BMM-TR features two low-power shutdown modes; Reverse Battery protection; adjustable soft-start; short-circuit current limiting; a ±2.0% feedback voltage accuracy and a ±1.00% output voltage accuracy. In addition, this voltage regulator also features a selectable output current limit of either 1A or 1.5A.

Applications of MIC3975-1.65BMM-TR

The MIC3975-1.65BMM-TR is suitable for a variety of applications, including laptops and desktops, networking equipment, battery-powered products, telecom and industrial automation devices, automotive systems and consumer electronics. This voltage regulator can be used in applications such as low noise, ultra-plushpower supplies for high-end audio equipment, automotive power solution and other applications requiring low noise, high stability and good accuracy. It is suitable for efficiency, longer battery life and faster transient response. In addition, this voltage regulator is also suitable for use in mobile solutions, where low power and low noise are required.

Working Principle of MIC3975-1.65BMM-TR

The working principle of a linear voltage regulator is based on the voltage drop across a series-connected element. This element is an electrically resistive material called a "resistor," which allow current to flow through it at a rate proportional to the applied voltage. In case of MIC3975-1.65BMM-TR, the regulator utilizes an operational amplifier and internal current-sense resistor to compare its voltage input to the output voltage. The operational amplifier then drives the pass transistor either in forward or reverse direction, depending on the comparison so that the output voltage remains constant.

As the load current increases, the voltage drop across the pass transistor increases, causing the output voltage to drop. This drop is detected by the operational amplifier and it increase the current through the pass transistor in order to restore the output voltage back to the initial preset level. In this way, the output voltage is regulated and remains constant even with variations in the load current.

Conclusion

The MIC3975-1.65BMM-TR is an excellent linear voltage regulator that provides power management solutions with low noise, high stability and excellent accuracy. It is suitable for a wide range of applications, from consumer electronics to mobile solutions, automotive systems and industrial automation devices. With its wide input voltage range, adjustable soft-start, reverse battery protection and two low-power shutdown modes, this voltage regulator makes it easy for designers to choose the right solution for their application.

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