MIC2877-4.75YFT-TR

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MIC2877-4.75YFT-TR Application Field and Working Principle

The MIC2877-4.75YFT-TR is a highly-integrated, step-down voltage regulator with a fixed output voltage of 4.75V and can provide up to 6A of current. It features a unique, energy-efficient design that combines state-of-the-art power MOSFET and current sensing technology. This device is ideal for providing regulated power supplies to a variety of circuits and applications, which require a small, reliable, and efficient power source.

The MIC2877-4.75YFT-TR is part of the company’s MIC2877-x.xYFT family of power management ICs (PMICs). This device follows the standard step-down switching principle and uses an internal, field-effect transistor (FET) and a current sensing resistor (CSR) to regulate the output voltage. The device uses Pulse Width Modulation (PWM) to control the output voltage, and soft-start and over-current protection to protect the load.

The MIC2877-4.75YFT-TR operates in two different modes: Forced PWM mode and Discontinuous Conduction mode (DCM). In Forced PWM mode, the current is limited by the external CSR and the output voltage remains constant. In DCM, the device utilizes an internal current-sense comparator to regulate the output voltage and limit the output current. This device also features a Frequency Fold-back feature, which allows the device to reduce the PWM frequency at high-current loading conditions, thus improving efficiency.

The MIC2877-4.75YFT-TR is perfect for providing a regulated output voltage to many types of mobile and portable devices, such as cellular phones and personal digital assistants (PDAs), as well as equipment and appliances that require a low power supply of 4.75V. It is also suitable for use in automotive and industrial applications, that require a reliable and cost-effective power source.

Conclusion

The MIC2877-4.75YFT-TR is a highly-integrated voltage regulator that uses pulse width modulation (PWM), soft-start, and over-current protection to provide a fixed output voltage of 4.75V to a variety of circuits and applications. It also features a frequency fold-back feature, which allows the device to reduce PWM frequency at high-current loading conditions, thus improving efficiency. This device is perfect for providing a regulated output voltage for many types of mobile and portable devices, as well as equipment and appliances that require a low power supply of 4.75V.

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