LTC3780IG#PBF

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LTC3780IG#PBF is a high-efficiency and high-performance, wide-input-voltage, synchronous dual-phase buck controller. It provides built-in Dual N-Channel MOSFET drivers and comes with all features required for today\'s advanced synchronous buck converter designs. The device provides total control over voltage and current regulation, enabling the engineer to design power supplies with excellent line and load DC regulation and EMI characteristics. It is both an ideal solution for solving all the complexities of synchronous buck design and an ideal tool for creating high-efficiency power supplies that operate at multiple points with a minimum number of output capacitors.

The LTC3780IG#PBF is designed and optimized for high-speed step-down conversions from one input and multiple outputs. It can be used to efficiently supply power over wide input voltage ranges while providing high-efficiency operation at multiple output voltages. It is particularly suitable for notebook and desktop computer power supply applications.

The device has a wide operating temperature range, -40°C to +125°C. It comes with internal Soft-Start and has integrated over-current, under-voltage and over-voltage protection. It offers precision current sensing, built-in frequency synchronization, internal synchronization to an external clock, low-ripple power supply design and programmable slew rate control.

The working principle of the LTC3780IG#PBF is based on a synchronous buck converter. The incoming voltage (input) is regulated with the MOSFETs from the controller, with the output voltage determined by the feedback loop. Current sensing is accomplished by measuring the voltage drop across the sense resistor. The output voltage is regulated by controlling the gate signal of the switching MOSFET. The controller senses the voltage on the output current sense resistor and compares it with the voltage reference to produce a signal for the switching MOSFET.

The output voltage is determined by the value of the voltage reference, the proportional-integral (PI) compensation filter, and the power stage design. The device can be configured to have synchronous dual-phase outputs with a streamlined power solution. The current feedback signal is used to track the load current and to adjust the PWM signal sent to the MOSFET driver to ensure optimal dynamic response. The LTC3780IG#PBF can be synchronized to an external clock in order to improve the output voltage ripple and reduce noise.

Overall, the LTC3780IG#PBF is an excellent tool for creating high-efficiency and low-noise power supplies that can provide power over a wide input voltage range and provide stable and reliable power output. Its wide operating temperature makes it well suited for harsh reliability requirements. Its synchronous buck converter design facilitates the engineer in designing power supplies with good line and load DC regulation and excellent EMI characteristics.

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