MAX8578EUB+T

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MAX8578EUB+T is a family of highly-integrated, high-efficiency, synchronous step-down DC-DC switching controllers that save space and reduce design complexity. It is designed to directly control external N-channel MOSFETs for up to 6A output current, with a single inductor topology. The MAX8578EUB+T operates from either 4.5V to 18V input voltages and has an adjustable output voltage range of 0.6V to 5.6V. It flexible, highly efficient and configurable features make it ideal for use in a variety of applications that require power conversion.

The MAX8578EUB+T provided several features to ease system integration such as programmable over voltage protection, power limiting, and current-mode digital loops. The integrated 100mΩ high-side MOSFET, 0.6Ω low-side MOSFET, and 600mΩ gate driver simplifies the power stage design and eliminates the need for external components. The advanced cycle-by-cycle current limit architecture can achieve efficient, wide-dynamic-range continuous current limit.

To provide high efficiency and fast transient response, the MAX8578EUB+T includes a synchronous rectification control for both high side and low side MOSFETs. Additionally, the device integrates an adjustable soft-start function, output voltage tracking, and thermal shutdown protection to protect the device in case of too high current. The MAX8578EUB+T can be easily implemented into designs through the I2C compatible inputs, enabling configuration of a variety of full-featured voltage supplies.

The MAX8578EUB+T works based on two control loops, voltage control loop and current control loop. The voltage loop is used to maintain output voltage constant by varying the switching cycle. In order to maintain the output voltage, the duty cycle of the switching cycle is controlled by the voltage loop, this is the voltage control loop, which is the PID circuit. The current control loop is used to maintain current output constant by controlling the amount of absolute current delivered to the output. The current loop is adjusted by sensing the peak current in the system.

The MAX8578EUB+T is ideal for a wide range of consumer and industrial DC/DC applications, such as set-top boxes, automotive power systems, gaming consoles, and telecom power supplies. It is suitable for low-power applications and enhanced with low quiescent current, high efficiency and fast transient response.

In conclusion, the MAX8578EUB+T is an advanced DC-DC switching controller that offers high-efficiency, flexible configuration, integrated MOSFETs and gate drivers and a range of features to simplify system integration. Its features and applications make it a great choice for consumer, industrial, automotive and other DC/DC applications.

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