MIC23051-C4YML-TR

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The MIC23051-C4YML-TR is a highly integrated, pulse-width modulation (PWM) synchronous buck switching voltage regulator optimized to provide high efficiency and excellent transient performance in compact, space-saving SOT-23 package. This device offers small size, large output current, low quiescent current, and low external component requirements. Featuring cycle-by-cycle current limit and robust pulse-by-pulse over current protection, the MIC23051-C4YML-TR helps designers to achieve a reliable, robust power supply solution.

Application Field and Working Principle

The MIC23051-C4YML-TR is designed primarily for powering microprocessors and other power sensitive applications. This, combined with its integrated reverse current protection, makes it suitable for a variety of applications. For example, it can be used as a synchronous buck converter for powering digital-analog converter (DAC) buffers and a variety of point-of-load digital circuits.

The device is a synchronous, buck-type switching regulator with integrated external MOSFETs. It operates in the fixed frequency, current mode control that provides rapid transient response while keeping maximum-available load current. The IC begins switching at the rising edge of the current-sense signal. During the activated time, the high and low side MOSFETs turn on and off alternately, allowing it to switch and regulate the load current to maintain a constant output voltage. The ramp of the current-sense signal turns off the high-side and low-side MOSFETs, ending the switching cycle.

The MIC23051-C4YML-TR can regulate output voltage range from 0.6V to 6V and drives up to 3A load current. It is designed with a low quiescent current of 6.8µA and a shutdown current of 0.1µA to conserve battery power. The integrated over-temperature protection circuit prevents thermal damage, reducing design complexity and sparing users extra trouble. In addition, the device is also designed to meet tight EMI and ESD requirements.

Conclusion

The MIC23051-C4YML-TR is a switched voltage regulator ideally suited for a variety of microprocessor and other power-sensitive applications. Its unique feature set includes small size, large output current, low quiescent current and low external component requirements, making it an ideal option for designers looking for a reliable, robust and space-efficient solution.

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