MIC2225-GFYMT-TR

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PMIC - Voltage Regulators - Linear + Switching could be roughly segregated into five distinct categories namely, Low Dropout (LDO) Regulators, Multiple Output Regulators, Step-up (Buck) Converters, Step-down (Buck-Boost) Converters and Linear (Inverting) Regulators. Out of these five distinct categories MIC2225-GFYMT-TR belongs to the category of Step-down (Buck-Boost) Converters.

A Step-down converter, also known as a Buck converter, is an electronic power conversion device that is designed to convert a higher DC voltage to a limited load with a lower voltage. A Buck-Boost converter is essentially a combination of a Buck converter and a Boost converter in one system. It can take an input voltage either higher or lower than the output voltage and steadily convert it. The MIC2225-GFYMT-TR is an integrated circuit (IC) Step-down (Buck-Boost) converter with an integrated regulator controller which makes it easier and suitable for many applications.

The MIC2225-GFYMT-TR Step-down (Buck-Boost) converter is primarily used in low voltage battery powered mobile and consumer electronic industry based applications. In summary, the MIC2225-GFYMT-TR Step-down converter is suitable for applications like cellular phones, digital cameras and portable entertainment gadgets or other portable systems.

The integrated regulator controller of MIC2225-GFYMT-TR is designed to maintain voltage levels precisely. It also features strong load regulation and high efficiency. This ic regulator is available in a 5-pin SOT-23 package, making it easy to use and efficient in saving space. The converter is especially useful in applications where there the available power supply is erratic or non-compliant to the required voltage levels.

The key features of MIC2225-GFYMT-TR are its ultra-low quiescent current that ranges from 20 μA to 300 μA and an adjustable output voltage that ranges from 0.9 V to 5V with a buck conversion efficiency of up to 98%. Other features worthy of mention are the wide input voltage range from 1.8V to 5.5V and its built-in safety features like thermal shut down, over voltage protection and reversed current protection.

The Working Principle of MIC2225-GFYMT-TR is relatively simple. In normal operating conditions, the MIC2225-GFYMT-TR includes an inductor, an input supply capacitor and an output diode. When the switch is on, current flows from the input supply to the inductor and the capacitor is charged after the switch is off. In other words, the inductor stores energy while the capacitor smoothens the output voltage. The output voltage is regulated using either a fixed or adjustable reference voltage, and if necessary, by increasing or decreasing the number of inductor turns as needed.

In conclusion, the MIC2225-GFYMT-TR is an integrated regulator controller Step-down (Buck-Boost) converter ideal for low voltage battery powered mobile and consumer electronics applications. It is designed to maintain voltage levels precisely with a quiescent current ranging from 20 μA to 300 μA and an adjustable output voltage from 0.9 V to 5V. The converter is also equipped with safety features such as thermal shut down, over voltage protection and reversed current protection for added reliability. Thanks to its integrated regulator controller and simple working principle, the MIC2225-GFYMT-TR is a very efficient and reliable Step-down (Buck-Boost) converter.

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