MIC4576BU TR

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The MIC4576BU is a monolithic high-voltage buck regulator with high-efficiency, consisting of a series of adjustable voltage regulator components and switching elements to produce an economical, miniature size, and high-efficient power supply. It is a DC (DC/DC/DC) switching regulator and protective circuit, which can be applied not only to dc power sources such as batteries, but also across-the-line AC mains, making it a highly flexible device. The DC/DC conversion function can be used to generated power from sources with higher output voltages, such as that of the ac mains.

The MIC4576BU regulator has a 40V input voltage range and a 3~40V output voltage range. The maximum output current is 2A, it can provide a switching frequency of 1MHz and a low operating quiescent current of 15mA. It also includes a low voltage Lockout (LVO) and an Over-Temperature Shut down (TSD) protection circuit. The MIC4576BU is available in an 8 pin PDIP, SOIC and QFN packages.

The working principle of the MIC4576BU is based on a Pulse-Width Modulation (PWM) technology. PWM allows the regulation process to operate at high frequency so that smaller components can be used. The regulation loop monitors the output voltage and compares it to an adjustable reference (IFB pin) to generate a feedback signal for the output voltage. The switching control algorithm adjusts the duty cycle of the internal switches to keep the output voltage at the proper level. The PWM output of the MIC4576BU is set by the current setting of the IFB pin. A negative current is applied to the IFB pin to increase the output voltage and a positive current is applied to decrease the output voltage.

The MIC4576BU offers a wide range of applications in the field of power management. It is used as a buck regulator in charging applications such as automotive battery charging, UPS systems and other AC/DC power supplies. It can also be used in solar energy applications, LED lighting solutions and medical appliances. It is ideal for applications that require very highvoltage, high-efficiency and low output ripple voltage. The MIC4576BU is also suitable for use in a wide variety of industrial and consumer electronics, such as mobile phones, automotive audio systems and electronic appliances.

In conclusion, the MIC4576BU is a high-voltage buck regulator with high-efficiency, suitable for a wide range of power management needs in the field of Dc/DC Converters. It is a versatile device with a wide input voltage range, an adjustable output voltage range and a low quiescent current. Additionally, it has built-in protection circuits for LVO and TSD and a wide range of packages to suit various application requirements.

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