MAX8668ETEU+T

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The MAX8668ETEU+T is a high performance, low-noise buck-boost regulator from Maxim Integrated which combines both linear and switching voltage regulator designs to provide superior efficiency and output stability. This buck-boost regulator is ideal for applications where the input voltage is changing frequently and the available output power is lower than expected.

The MAX8668ETEU+T features a 2A output current limit, a short-circuit protection and a maximum input voltage of 32V. It also has a wide input voltage range of 2.5V to 32V, an adjustable fixed output voltage range of 1.2V to 28V and a wide temperature range from -40°C to +175°C. The regulator operates from an external clock source and can be adjusted from 3.2MHz to 9.6MHz using the user-selectable frequency module and a sense resistor. Its wide frequency range allows it to maintain a fast transient response and high efficiency. The regulator also features a 2.5V precision reference voltage and an adjustable soft-start circuit to ensure a safe start-up. This buck-boost regulator can be used to reduce the power dissipation of handheld, automotive and telecom applications.

The MAX8668ETEU+T utilizes a dual-stage design consisting of a fixed-frequency linear regulator and an adjustable-frequency switching regulator. The linear regulator is designed to provide a very low-noise output supply and the switching regulator is designed to provide higher output current. The linear regulator is used to provide a reliable, low-noise output at low current draw, while the switching regulator provides the ability to produce a wide output voltage range with improved efficiency. When the load requirement is low, the linear regulator provides a low-noise output supply. When the load requirement is high, the switch mode regulator takes over to provide a higher output current and improved efficiency.

The MAX8668ETEU+T also includes an auto-select circuitry that automatically selects the most suitable operating mode based on the target application requirements. The auto-select function monitors the input voltage and output current, and it automatically switches between fixed-frequency linear and adjustable-frequency switching modes of operation. It also supports dynamic load sharing, which distributes the load between the linear and switching regulators, ensuring a reliable and efficient output voltage.

In summary, the MAX8668ETEU+T is a high performance, low-noise buck-boost regulator with dual-stage design that combines both linear and switching voltage regulator designs. It is ideal for applications where the input voltage is changing frequently and the available output power is lower than expected. It provides a wide input voltage range of 2.5V to 32V, a wide temperature range from -40°C to +175°C, and an adjustable fixed output voltage range of 1.2V to 28V. The regulator also includes an adjustable soft-start circuit to ensure a safe start-up. Its wide frequency range allows it to offer a fast transient response and high efficiency. It can be used to reduce the power dissipation of handheld, automotive and telecom applications.

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