LT3790MPFE

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The LT3790MPFE is a high power, high efficiency synchronous DC/DC controller design for applications that require up to 40V input voltage and up to 70A output current. It is designed to drive one N-channel MOSFET with adjustable current levels to provide a wide range of output and transient response control. The LT3790MPFE is optimized for excellent transient response, with a wide voltage range of operation and high efficiency operation. Its flexibility allows it to meet the needs of a variety of applications.

The LT3790MPFE provides a high-side current sense for the FET current limiting, an adjustable output voltage and a programmable peak current mode control loop. It also features the low power consumption, wide operating temperature range and adaptive deadtime control. The operating frequency can be adjusted from 100kHz to 1MHz using an external resistor. In addition, the LT3790MPFE has a wide input voltage range from 4.5V to 40V and can operate from an unregulated input.

The LT3790MPFE has a variety of application fields including automated test equipment, optical transceivers, high voltage converters, hot swap power circuits, and the automotive industry. The circuit can be used to power small motors and light loads, providing wide adjustable voltage source ranges, efficient power conversion and good dynamic response. It is also used in power management and battery charging applications, providing adjustable output currents.

The working principle of the LT3790MPFE is to convert a regulated input voltage to regulated output voltage through the power MOSFET stages in the circuit. The controller provides adjustable current limiting, allowing a wide range of output current to be controlled. An external resistor is used to control the operating frequency and an adjustable voltage divider is used to set the output voltage. The circuit also implements a Peak Current Mode control loop to provide fast response to any step loads. The operating current is monitored and controlled using the comparator circuitry.

The LT3790MPFE is a high-performance, high efficiency synchronous DC/DC controller that provides adjustable current limiting, excellent transient response and wide input voltage range. It can operate from an unregulated input voltage and is optimized for use in a wide range of applications such as automated test equipment, optical transceivers, high voltage converters, hot-swap power circuits, automotive applications and power management systems. The operating frequency can be adjusted with an external resistor and the output voltage can be set with an adjustable voltage divider. The circuit implements a peak current mode control loop to provide fast response to step loads, and the operating current is monitored with comparators.

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