LTC3805HMSE-5#TRPBF

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The LTC3805HMSE-5#TRPBF is a high efficiency, monolithic synchronous step-down DC/DC controller. It is designed for energy-efficient, low- maintenance and low-cost applications, such as portable equipment and industrial supplies. This device allows the DC/DC conversion to be both regulated and synchronous. It includes an adjustable current-mode control loop, an undervoltage lockout (UVLO) circuit, a power save mode, and …a synchronous rectifier pull-up transistor to drive the low-side FET. It can drive an N-channel MOSFET from 4.5V to 28V with a high conversion efficiency. This device also offers active current sharing across multiple devices.

The LTC3805HMSE-5#TRPBF provides a wide range of features for a high-performance DC/DC conversion. Its wide input voltage range allows for greater flexibility for unregulated battery or AC adapters to be used; It provides precision output voltage regulation with a 0.6% accuracy over line, load, and temperature conditions. Additionally, it allows for high efficiency with its low start-up current, low quiescent current, and low no-load operating current. Furthermore, it provides temperature protection with thermal shutdown and built-in overtemperature protection.

In terms of application field, the LTC3805HMSE-5#TRPBF\'s wide input voltage range and its active current sharing features make it ideal for powering industrial, communications, and medical equipment, such as routers, servers, PDAs, and cameras. Moreover, its fast transient response and accurate compensation ensure stability, even in transient load conditions. This makes it suitable for use in harsh, demanding environments.

The LTC3805HMSE-5#TRPBF works based on current-mode control. It utilizes an analog current-mode modulator to control the duty cycle of the gate-drive signal of the MOSFET. A high-gain error amplifier is used to compare the programmed output voltage to an internal voltage reference. A sense resistor is used to detect the output current and keep it regulated. The current-mode control will turn on and off the MOSFET as needed in order to regulate the output voltage.

The device\'s low start-up and quiescent currents, combined with its wide input voltage range, make it suitable for low-maintenance, energy-efficient applications. Additionally, its current limiting, overtemperature and undervoltage protection features help ensure reliable operation, even in harsh and demanding conditions. In summary, the LTC3805HMSE-5#TRPBF is a high-performance, monolithic synchronous step-down DC/DC controller that provides maximum efficiency and minimum power consumption, making it an ideal choice for powering industrial, communication, and medical applications.

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