LTC3850EUFD#TRPBF

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The LTC3850EUFD#TRPBF is a highly efficient, polyphase synchronous step-down switching regulator controller IC designed for high current applications requiring high accuracy. It is designed to be used in a wide variety of applications, including servers, microprocessors, communications, automotive, and industrial. It is a member of the Linear Technology family of DC-DC switching controllers and is part of the LTC3800 series of controllers. This device features a low input voltage range from 2.7V to 6V, and can support outputs from 0.6V to 5V, with currents up to 80A for the LTC3850EUFD.

The device is an active current-mode PWM, with a maximum duty cycle of 100%. It supports all major PWM control architectures, including peak-current-mode control and voltage-mode control. In addition, it supports cycle-by-cycle current foldback current limiting, programmable frequency, soft-start and shutdown control, as well as low RDS(ON) gate driver outputs.

The LTC3850EUFD is a highly efficient switching regulator with a wide variety of application fields. It is used to power microprocessors, digital signal processors, ASICs and FPGAs, embedded controllers, and other applications requiring low noise and high power for short periods of time. It is especially useful for applications with high transient current demands and high-speed rail-to-rail output swings.

The LTC3850EUFD works on the principle of active voltage-mode PWM and consists of an oscillator, error amp, power MOSFET drivers, analog current limit and feedback loop. The frequency of the oscillator is adjustable with an internal clock. The error amp monitors the output voltage and compares it with the feedback reference and adjusts the oscillator frequency to adjust the output voltage. The power MOSFET drivers act as a bridge between the power sources and the outputs. The current limit is set with an external resistor and protects the device against overloads. The feedback loop is responsible for maintaining precise control of the output voltage.

The LTC3850EUFD is ideal for powering high current, high transient applications with low noise, high accuracy and cycle-by-cycle current foldback current limit. It is fully protected against over-voltage, short-circuit and over-temperature operation and is applicable in a wide range of DC-DC switching regulator applications. It is particularly suitable for powering high performance microprocessors, ASICs and FPGAs, as well as embedded controllers and communications systems.

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