MIC23051-945YML-TR

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PMIC (Power Management Integrated Circuit) technology today plays a central role in managing and controlling the power consumption requirements of modern electronics. The Voltage Regulators and DC DC Switching Regulators have enabled the power delivery systems to keep the system power consumption within optimum limits. One such device is the MIC23051-945YML-TR integrated circuit, which is a high-efficiency, low-noise, and low-cost DC-DC step-down switching regulator.

Application Field

The MIC23051-945YML-TR switching regulator is best suited to a wide variety of applications requiring non-isolated output such as telecom, industrial, automotive, network, and computing systems where output voltages range from 0.6V to 8V. The MIC23051-945YML-TR device provides an adjustable output voltage between listed limits with high accuracy (typically 1%), and output current up to 2A. It provides a user-programmable output voltage over the full range of 0.6V to 8V, and the output current of up to 2A.

Furthermore, the MIC23051-945YML-TR device features a low power mode based on light Load Efficiency (LLE) architecture which enables the device to consume only 1µA of quiescent current and can achieve a light load response rate of 7µs. Thus, this feature makes it suitable for a wide array of low-power applications.

Working Principle

The MIC23051-945YML-TR device works on a two-step process to generate the regulated output voltage. In the first step, it internally performs the pulse width modulation (PWM) and the external circuit is used to adjust the voltage. In the second step, the output voltage is regulated by employing a voltage feedback architecture and a precision internal voltage reference.

During the initial PWM in the first step, the MIC23051-945YML-TR device uses a pair of transistors, namely NMOS and PMOS. The PMOS transistor is used to control the conduction of the inductor current and the drain voltage is passed to the integrate voltage reference through a resistive network. The NMOS transistor is used to reduce the current to zero by discharging the electric energy stored in the inductor. The amount of the pulse width required for the system to achieve the desired output voltage level is determined by the feedback control circuit.

In the second step, the output voltage is regulated by comparing the voltage determined by the feedback control with the reference voltage. When the two voltages are equal, the regulator provides a regulated output voltage. The MIC23051-945YML-TR device features an on board compensation network and allows the user to externally adjust the output voltage.

Conclusion

In conclusion, the MIC23051-945YML-TR switching regulator is a high-efficiency, low-noise, and low-cost device designed for usage across a broad range of applications requiring non-isolated output. It works on a two-step process where the output voltage is adjusted and regulated, respectively, via pulse width modulation technique and a voltage feedback architecture. With the ability to support up to 2A of output current and adjustable range of 0.6V to 8V, the MIC23051-945YML-TR is ideal for low-power applications.

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