LT8311EFE#TRPBF

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The LT8311EFE#TRPBF is a high-performance synchronous PWM controller suitable for generating a regulated output voltage in either a buck (step-down), boost (step-up), or buck-boost topology. Built with embedded protections, a fast response regulator and MOSFET driver, the LT8311 is suitable for applications with mid-level power and high efficiency where space and cost are critical. Output voltages can be programmed up to 60V with a switching frequency of up to 1.2MHz, making this device ideal for efficient designs with high noise immunity.

Features of the LT8311EFE#TRPBF

The LT8311EFE#TRPBF includes several features to enhance system performance. It has a wide input voltage range (4V–60V) and can generate an output voltage ranging from 0V to 60V. It also has programmable soft-start and adjustable frequency (200kHz to 1.2MHz) that can be set using an external resistor. The LT8311 also includes integrated protection for over-voltage, under-voltage, over-current, and thermal events. An external resistor is used to set the current limit. Furthermore, the LT8311 has a fast voltage error amplifier to improve transient response.

Application Field of the LT8311EFE#TRPBF

The LT8311EFE#TRPBF is designed for use in wide range of applications, including DC/DC converters, point-of-load (POL) converters, automotive, industrial, medical, computing,and gaming systems. The LT8311 is suitable for systems with high noise immunity and high efficiency requirements. It can also be used in high isolated Step-Down, Step-Up and Buck-Boost voltage conversion systems.

Working Principle of the LT8311EFE#TRPBF

The LT8311EFE#TRPBF uses a synchronous PWM (pulse width modulation) control loop for regulating the output voltage. The closed-loop operation starts off with an internal error amplifier that compares the output voltage to an internal reference voltage and produces an error signal. This error signal is compared to the clock signal that comes from an external oscillator. The output of this comparator is used to control the gate driver, which in turn drives the MOSFET. If the error signal is greater than the clock signal, the MOSFET is turned off, stopping the flow of current through the inductor and output rectifier. If the error signal is less than the clock signal, the MOSFET is turned on and current begins flowing through the inductor and rectifier, which results in an increase in the output voltage. This loop is continuously repeated in order to regulate the output voltage.

Conclusion

The LT8311EFE#TRPBF is a high performance synchronous PWM controller ideal for a variety of applications with high efficiency, wide voltage range (4V–60V), fast transient response, and built-in protections. It is suitable for DC/DC converter, POL, automotive, industrial,medical, computing and gaming systems. The LT8311 uses a synchronous PWM control loop that starts off with an internal error amplifier and is continuously repeated in order to regulate the output voltage.

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