MIC2177BWM-TR

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The MIC2177BWM-TR is a member of the high-performance, low-noise, synchronized single-output step-down DC-DC converter family manufactured by Microchip. This type of DC-DC switching regulator controller has become increasingly important to the modern market due to its substantial energy efficiency and low noise production. Its applications range from the very basic, such as providing the power to components without significant heat generation, to the very intricate, such as providing a unique output for a specific purpose.

The MIC2177BWM-TR is capable of providing high efficiency at optimized light load performance utilizing its constant on time (COT) control architecture. The device is also capable of being synchronized to an external clock signal in order to meet the power delivery needs of multiple applications. In addition, it provides several features and options to further tailor its operation to the needs of any given application.

The standard MIC2177BWM-TR consists of an integrated voltage regulator, an over-current detector, an adjustment pin that supplies voltage sense, and an output driver circuit, all in a very small 4x4mm2, 24-pin QFN package. This small size makes it an attractive option for space restricted applications, such as portable consumer electronics.

The working principle of the MIC2177BWM-TR is relatively simple. It starts with the internal voltage regulator monitoring a voltage level that is slightly higher than the desired output voltage. When the voltage rises, it is sensed by the over-current detector, triggering a burst of its internal PWM signal that tells the output driver when the switch FET must be turned on. This is called the dead time, and is typically very short, often less than 500ns. Then, the output driver circuit turns on the FET and drives the output voltage to the desired level.

The adjustable COT feature, when enabled, allows the user to regulate the duration of the burst as needed. This allows for much finer voltage and current regulation than typical hysteretic controllers, while still maintaining the same board size and minimal component count, thus reducing system cost. The COT value can be adjusted via the pin access or, if the user desires, via an external signal.

The MIC2177BWM-TR\'s wide input voltage range of 4.5V to 28V, along with its adjustable 4.75V to 28V output voltage range and 2A output current capability, makes it an ideal choice for a wide variety of applications. These include but are not limited to Industrial, Medical and Automotive applications, as well as portable consumer electronic devices.

The MIC2177BWM-TR\'s low noise production and synchronization capabilities also serve to make it the ideal choice for any noise-sensitive application, such as audio systems, or any application that requires precise signal tracking. In addition, the device\'s small size makes it easy to implement into a variety of systems without taking up too much space.

In summary, the MIC2177BWM-TR is a perfect choice for a wide variety of DC-DC switching regulator applications. Its wide input voltage range, adjustable output voltage and current, synchronization capabilities, and small size make it an ideal fit for any application.

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