LTC3809EMSE-1#PBF

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The LTC3809EMSE-1#PBF is classified as a PMIC (power management integrated circuit) device from the Voltage Regulators/DC DC Switching Controllers family. In essence, it is designed to provide a modern, digitally programmable and power efficient solution to high current requirements. It integrates a diverse range of features, including an adjustable voltage reference, high current synchronous buck converter and a system-level power estimator.

This high-performance device is specifically designed to interface with existing power systems, as it provides both digital and analog control interface options. In addition, the LTC3809EMSE-1#PBF supports a wide input voltage range (2.2V–15V), permitting its use in various applications.

The main applications for the LTC3809EMSE-1#PBF are in powering intermediate bus converters (IBCs) and voltage step-down converters. These converters are commonly used in distributed power systems, enabling them to deliver safe and reliable power to components in the system. The versatility of the device’s control interface and its fast response also make it a great choice for powering clocked circuitry.

As for its working principle, the LTC3809EMSE-1#PBF contains a dedicated regulation circuit, a switching controller and a protection circuit that contain two independent power supply parts. When used in a power system, the voltage reference senses the output voltage, comparing it to a set output voltage level. It then adjusts the switching cycle of the buck converter in order to keep the output voltage at the desired level.

The voltage reference works together with a power estimator to keep the output current in check. As the current increases, the switch is deactivated and the feedback loop is reset, allowing the system to prevent exceedance of the rated output current. The LTC3809EMSE-1#PBF also features an internal temperature protection circuit for detecting over-temperature conditions.

In summary, the LTC3809EMSE-1#PBF from the DC DC Switching Controllers family of PMICs is a modern, digitally programmable and power efficient solution for high current requirements. It is used mainly in powering intermediate bus converters and voltage step-down converters, providing both digital and analog control interface options as well as temperature protection.

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