LTC3838EFE#PBF

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The LTC3838EFE#PBF, a synchronous DC/DC buck topology step-down switching regulator controller, is used when a regulated core voltage needs to be sourced from a higher voltage battery. It is ideal for applications where high efficiency, fast transient response, and low quiescent current are required, such as distributed power systems, automotive, green energy systems, and portable devices. It is rated for operation up to 38V and is available in Pb-free DFN and TSSOP packaging options.

Overview of LTC3838EFE#PBF Features

The LTC3838EFE#PBF is a synchronous DC/DC buck topology step-down switching regulator controller designed for high-voltage main supply applications. It is ideal for systems such as distributed DC/DC converter powers including battery-powered systems. It can efficiently step-down high voltage rail to provide a regulated output voltage.

The LTC3838EFE#PBF provides a wide range of features, such as input voltage range from 4.5 V to 38V, adjustable output voltage range from 0.81 V to 33V, adjustable switching frequency up to 2.25 MHz, power-on-reset, output overvoltage protection, short-circuit protection and thermal shutdown. It also includes an adjustable maximum duty cycle and a bounty of advantages such as a wide operational temperature range (-40°C to +85°C) and Pb-free DFN and TSSOP packages.

Working Principle of LTC3838EFE#PBF

The LTC3838EFE#PBF is a synchronous buck converter designed for high-efficiency step-down voltage conversions. It uses synchronous rectification and is optimized for use with N-channel MOSFETs. The regulator’s clock signal controls the duty cycle of the synchronous MOSFETs. The current sense resistor and output voltage feedback voltage determine the operating frequency. The frequency can be adjusted to optimize performance for a given application.

The LTC3838EFE#PBF switches the synchronous MOSFETs at a frequency determined by the current sense resistor, feedback voltage, and frequency compensation network. The peak current is determined based on the current sense resistor and inductor value. The voltage waveform across the inductor will vary with different capacitors, output voltage, and load current. To ensure the output voltage remains constant, the regulator employs a voltage feedback circuit to control the switching frequency. The maximum duty cycle can also be adjusted to limit the maximum output current and protect against over current. In addition, the LTC3838EFE#PBF also includes protection circuits to protect the converter against short circuits, overvoltage, and thermal overloads.

Applications of LTC3838EFE#PBF

The LTC3838EFE#PBF is ideal for applications requiring high efficiency and fast transient response. It is designed for distributed power systems, automotive, battery operated systems, green energy systems, and portable devices. It can be used in applications such as Point-of-Load (POL) converters, DC/DC converters, Motor Control and battery powered systems.

The LTC3838EFE#PBF is ideal for applications requiring high efficiency and fast transient response. It is designed to reduce input current ripple, improve conversion efficiency, and reduce system cost by using smaller external components. It can be used to step down input voltage levels with an operating input voltage range from 4.5 V to 38V. The LTC3838EFE#PBF also features protection circuits to protect theonverter against short-circuits, over-voltage, and thermal overloads.

The LTC3838EFE#PBF is available in Pb-free DFN and TSSOP packages and is rated for operation up to 38V. Its wide range of features and excellent performance make it ideal for applications where maximum efficiency, fast transient response, and low quiescent current are required.

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