MIC4126YME-TR

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Introduction: The MIC4126YME-TR is a power-management integrated circuit (PMIC) specifically developed as a floating-channel gate driver that provides level-shift voltage translation between logic and high-side/low-side N-channel MOSFETs. This floating-channel device can be used with low-side MOSFETs that can tolerate negative gate voltages, such as P-channel MOSFETs.

Application Field: The MIC4126YME-TR is a popular choice for its ability to provide high-speed driving capability, enhance the gate-driving performance, reduce applications’ power consumption and make them immune to the effect of common-mode noise. It is ideal for any application that requires a gate driver, such as switching power supplies, solar inverters, motor drivers and DC-DC converters. Its applications include automotive body control and lighting, AC motor drives, DC motor drives, power tools, welding systems, uninterruptible power supplies, UPS and home appliances.

Working Principle: The MIC4126YME-TR consists of a top-side VGS level-shifter and a bottom-side VGS level-shifter. The VGS top-side level-shifter is a P-channel MOSFET. It works in the following way. First, the P-channel MOSFET turns on, forming a current path through the gate-source capacitor CGS. When the gate-source voltage VGS reaches the MOSFET’s threshold voltage, the P-channel MOSFET turns off, releasing the current stored in the gate-source capacitor CGS. This current turns on the bottom-side N-channel MOSFET, producing a voltage shift in the gate-source voltage VGS. This current also turns on the top-side N-channel MOSFET, thus providing the switching path for the high-side and low-side MOSFETs.

The MIC4126YME-TR provides protection against hazardous conditions such as overvoltage and undervoltage with an integrated self-protection circuit that shuts down the device if an overvoltage or undervoltage condition occurs. It also features fast switching times, up to 25ns, and a wide range of operating temperature from -40°C to 85°C.

Conclusion: The MIC4126YME-TR is a gate driver PMIC providing fast switching capability and level-shift voltage translation between logic and high-side/low-side N-channel MOSFETs. Its fast switching times and wide operating temperature range make it a great choice for switching power supplies, solar inverters, motor drivers and DC-DC converters. Its integrated self-protection circuit provides added protection against hazardous situations, such as overvoltage and undervoltage.

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