LT8705AEUHF

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LT8705AEUHF is a highly integrated power management IC (PMIC) from Linear Technology that is specifically designed for use in DC/DC switching controllers. It allows users to push the voltage converters in their system to new heights, providing improved performance and configurability. The LT8705AEUHF offers the necessary protection features to ensure safe and reliable operation, as well as a wide range of integrated features that simplify the design process.

Features and Benefits

The LT8705AEUHF includes a variety of features and benefits that make it an attractive choice for DC/DC switching controllers. Among these are its pin-selectable synchronous switching frequency, allowing the user to gracefully scale the clock to the desired application; high efficiency synchronous rectification to reduce system cost, power loss, and component size; analog pulse-width-modulation (PWM) dimming capability; and a fault-protecting system that shuts down the output if overvoltage, undervoltage, overload, or overtemperature conditions occur.

The device also has integrated output voltage sensing and loop compensation, allowing the operating parameters to be programmed by the user to optimize efficiency, transient response, and output voltage stability. In addition, the LT8705AEUHF provides integrated short-circuit protection, overvoltage protection, undervoltage protection, current limit protection, and pulse-by-pulse current limiting.

Application Field

The LT8705AEUHF is a high performance power management IC suitable for high power DC/DC switching controllers in telecommunications infrastructure, networking, and computing applications. The device is also suitable for general-purpose non-isolated and isolated DC/DC converters.

Working Principle

The LT8705AEUHF utilizes a combination of gate driver stages, gate drive FETs, current limit sensing, voltage sensing, and feedback control circuits to provide a highly efficient, adjustable, and configurable DC/DC switching controller. It is configured to operate in a synchronous buck topology and is capable of driving either a low side or high side N-channel MOSFET.

The device works by sensing the input voltage, controlling the duty cycle of the PWM signal to the gate driver, and providing the necessary feedback control for voltage regulation. It also features an adjustable current limit and overvoltage protection circuit. By utilizing these features together, the LT8705AEUHF is able to regulate the output voltage.

Conclusion

The Linear Technology LT8705AEUHF is a highly integrated power management IC for DC/DC switching controller applications. It offers a variety of features and benefits such as a pin-selectable synchronous switching frequency, high efficiency synchronous rectification, analog PWM dimming capability and integrated fault-protection. Additionally, it provides integrated voltage and loop compensation, integrated current limit protection, pulse-by-pulse current limit protection, and overvoltage and over temperature protection. This makes the LT8705AEUHF an attractive choice for a range of telecom, networking, and computing applications.

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