MIC2179-3.3BSM

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MIC2179-3.3BSM is an advanced synchronous step-down DC-DC switch mode regulator from Microchip Technology. It is a low-cost, low-noise, and efficient solution for voltage regulation of digital circuits and power conversion applications such as servers, cellular infrastructure, and FPGAs. The regulator operates over a wide input voltage range of 3V to 18V, with a current capacity of up to 5A.

The MIC2179-3.3BSM is designed with a high-performance 2-phase PWM architecture and integrated synchronous MOSFET drivers. This architecture allows it to achieve excellent efficiency, while the integrated MOSFET drivers reduce external component count and minimize thermal dissipation. The regulator also features a wide output voltage range of 0.8V to 3.3V, adjustable switching frequency up to 1MHz and adjustable current limit, programmable soft-start and thermal shutdown protection.

The MIC2179-3.3BSM is an ideal solution for a variety of power supply requirements in applications such as servers, cellular infrastructure, and FPGAs. The regulator’s wide input voltage range, flexible output voltage range, and high efficiency make it suitable for providing a wide variety of output voltages for a given input voltage. The integrated MOSFET drivers allow for efficient operation and minimize thermal dissipation, making it an ideal solution for applications where low noise and high efficiency are essential.

The working principle behind the MIC2179-3.3BSM is fairly simple. It is based on a 2-phase PWM architecture which operates in synchronous mode. The PWM portion of the regulator is responsible for converting the input voltage into a pulse-width modulated signal that is used to control the output voltage. This is done by regulating the duty cycle of the synchronous MOSFET drivers. The regulator is designed to take current readings from a sense resistor through an integrated current sense amplifier, which allows it to provide accurate current limiting behavior.

The advantages of using a synchronous step-down DC-DC switch mode regulator such as the MIC2179-3.3BSM are numerous. The high efficiency of the synchronous mode operation, combined with the integrated MOSFET drivers provide excellent performance at low noise and minimal dissipative losses. Furthermore, the adjustable switching frequency and output voltage range give the designer the flexibility to create a wide variety of power supplies with a minimal component count. Finally, the integrated current limit and programmable soft-start functions provide protection against component failure and nuisance trip-ups.

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