MAX5068FAUE-T

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The MAX5068FAUE-T is a controller specifically designed for DC-DC switching regulators in applications such as automotive, industrial, and general-purpose systems. It is part of a family of devices from Maxim Integrated dedicated to PMIC (Power Management Integrated Circuit) voltage regulation. The MAX5068FAUE-T is a general-purpose, switching regulator controller for buck, boost, and buck-boost topologies.

The MAX5068FAUE-T’s operating principle, in simple terms, is to actively monitor the output voltage of the power supply and control the duty cycle of the switch (such as a MOSFET) which is connected across the input capacitance in order to maintain the desired output voltage. This is done by a Pulse Width Modulation (PWM) technique with programmable switching frequencies that establish the regulator’s power efficiency.

The MAX5068FAUE-T’s main features include:

• Pin-selectable voltages from 0.5V reference
• Pin-selectable switching frequency from 200kHz to 2.5MHz
• 0.8% to 2% output voltage accuracy
• Wide input voltage range from 4.5V to 42V
• Wide output current range from 0.25A to 3A
• Selectable soft-start, over-current limit, and power saving mode
• High-side current sensing

The MAX5068FAUE-T’s pin-selectable voltage range enables designers to optimize their system voltage requirements, while its pin-selectable switching frequency helps achieve the desired efficiency level. In addition, its wide input voltage range allows for use in a variety of power conversion applications. Additionally, its wide output current range allow it to be used in applications requiring up to 3A of output current.

The MAX5068FAUE-T’s features also include selectable soft-start, which helps the circuit start smoothly with minimal input voltage spike. Its over-current limit circuitry helps prevent the controller from over-stressing by preventing excessive current flow. It also includes power saving mode, which can help maximize the efficiency of the system by reducing the current drawn from the input supply during light or no-load conditions.

Finally, its high side current sensing feature enables the controller to detect current flow at the input side of the switching power train, allowing the controller to actively adjust the duty cycle of the switch as needed to maintain proper voltage regulation.

The MAX5068FAUE-T is a powerful, flexible, and cost-effective controller designed for applications requiring high-performance DC-DC switching regulators.

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