MIC28500YJL-TR

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The MIC28500YJL-TR is a multi output synchronous step-down voltage regulator that works in DC to DC switching regulation. It features advanced current-mode control, high efficiency and provides very precise accuracy for output voltage regulation. The application fields and working principles of the MIC28500YJL-TR will be described in detail below.

Application Fields

The MIC28500YJL-TR is specially designed for advanced portable applications such as notebooks, ultrabooks, tablets and gaming systems. It provides current-mode control with fast transient response and precise accuracy. Its low power dissipation at light load operating conditions ensures lowest power consumption for portable applications. The MIC28500YJL-TR also supports various output power configurations through its devices enable and soft-start pins.

The MIC28500YJL-TR is also ideal for a wide range of applications such as automotive electronics, medical equipment and industrial equipment. Its low-noise operation makes it suitable for use in noise-sensitive environments. Furthermore, its overcurrent and short circuit protection capabilities make it an ideal choice for battery-powered applications, where reliable protection is always a priority.

Working Principle

The MIC28500YJL-TR utilizes a current-mode control architecture which enables quick and precise output voltage regulation. The main components of the voltage regulator include the main power switch, the power inductor, the internal compensation circuitry, the current sense resistor, and the output capacitor. The internal compensation circuitry synthesizes an error signal from the output voltage, the inductor current, and the current sense resistor.

An internal oscillator sets the switching frequency of the regulator. Depending on the magnitude of the error signal, the MIC28500YJL-TR will either increase or decrease its output current, thus regulating the output voltage of the regulator. If the output voltage is too low, the regulator increases its output current and vice versa.

To enable current-mode control, the regulator monitors the peak inductor current. The peak inductor current is compared to a reference current, stored in an internal digital-to-analog converter (DAC). When the peak inductor current exceeds the DAC reference, the regulator turns off the MOSFET, thus preventing any further current flow.

The MIC28500YJL-TR current-mode control also provides advanced protection functions, such as overcurrent protection, short circuit protection, and output voltage protection. The overcurrent protection circuitry monitors the inductor current, and if the peak current exceeds the overcurrent threshold, the regulator shuts down. Similarly, if the output voltage is outside the safe operating tolerance, the regulator also shuts down.

In conclusion, the MIC28500YJL-TR is a multi output synchronous step-down voltage regulator. It has been specially designed for advanced portable applications such as notebooks, ultrabooks, tablets and gaming systems. The current-mode control architecture ensures quick and precise output voltage regulation and protects the device from overcurrent and short circuit conditions. The device also supports various output power configurations and provides low power dissipation at light load conditions. Overall, the MIC28500YJL-TR is an ideal solution for a wide range of DC to DC switching regulation applications.

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