MAX20076ATCC/V+

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MAX20076ATCC/V+ application field and working principle

The MAX20076ATCC/V+ is a synchronous step-down DC/DC switching regulator for automotive applications. It is part of a range of DC/DC switching regulator chips offered by Maxim Integrated. The MAX20076ATCC/V+ is optimized for automotive systems, as it includes features such as an automotive-grade AEC-Q100-compliant package, as well as under-voltage, over-voltage, over-current and over-temperature protection.

The MAX20076ATCC/V+ comes with a number of features to ensure that it is suitable for automotive applications. It supports input voltage ranges of 4.3 V to 42 V, and comprises two independently control output voltage ranges of 0.6 V to 24 V, and 0.6 V to 10 V. In addition, the output current is adjustable up to 25 A and up to 40 A with external components. The chip also has a low quiescent current (IQ) of 20 mA.

The MAX20076ATCC/V+ features built-in frequency synchronization with a spread-spectrum capability to minimize EMI. The chip supports a maximum switching frequency of up to 1.4MHz with an adaptive power-saving mode to minimize power consumption at light loads. The chip also includes a dual-phase architecture with up to two-phase interleaving for higher efficiency at low duty cycles.

As for its working principle, the MAX20076ATCC/V+ is based on the usual Buck topology. In Buck topology, the switch connected to the input voltage source is connected to ground periodically, causing the current flowing to the load to be intermittently switched on and off. The duty cycle, which is the ratio of the switch-on time to the total period, determines the output voltage. To further improve efficiency, the chip also includes MOSFETs in a low-side and a high-side configuration.

By using external resistors, the output voltage can be divided and adjusted. The output voltage is proportional to the on-time of the switch, which is controlled by the duty cycle or the average inductor current. The IC also includes a slew rate control circuit, which helps to reduce switching noise by reducing the switching speed during high-speed transitions and ensuring that the MOSFETs have time to turn on and off.

The MAX20076ATCC/V+ is a highly integrated DC/DC switching regulator designed for automotive applications. Its low quiescent current, built-in EMI reduction, and dual-phase architecture make the chip suitable for applications where space and power efficiency are important. Moreover, its adjustable output current, and adjustable output voltage ranges make it suitable for a wide range of automotive voltage-regulation applications.

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