LT8390HUFD#TRPBF

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The LT8390HUFD#TRPBF is a DC/DC synchronous buck converter that integrates a low-power microcontroller (MCU) and a high-side power MOSFET in a single package. Designed for automotive applications, it operates with input supply voltages from 4V to 24V range, with a maximum output current up to 8A. This buck converter has a fully digital control loop for greater efficiency, accuracy, and flexibility in power conversion compared to analog-controlled converters, allowing parameters to be controlled using an MCU.

The application fields of the LT8390HUFD#TRPBF are as follows:

• Automotive applications: such as BCMs, OBCs, and ECUs
• 12V to 24V input, 1.2V to 5V output voltage range
• Aggressive light load efficiency improvement
• Robust thermal performance for up to 8A output current

The highly efficient buck converter has a very flexible digital control system, which minimizes conversion losses and helps to reduce cost and size. The system’s control loop is managed to ensure the optimal loop conditions and fast transient responses, while the on-chip digital voltage control improves accuracy and reduces the output voltage ripple. The LT8390HUFD#TRPBF has a power good signal, as well as over temperature protection.

As for its working principle, the LT8390HUFD#TRPBF synchronous buck converter is a voltage regulator that utilizes pulse width modulation (PWM) to regulate the output of a DC-DC circuit. In a buck-converter, the input voltage is first rectified and then chopped into pulses using an MOSFET switch. The width of these pulses is regulated using PWM, allowing the output voltage to be fixed. The pulse width is managed by the MCU through a digitally programmable loop that allows for fast responses and higher efficiency.

In conclusion, the LT8390HUFD#TRPBF is a versatile DC to DC controller that integrates a low-power MCU and a MOSFET into a single package. It has a wide input and output voltage range, an aggressive light-load efficiency, and a robust thermal performance. The digital control loop allows the system to be optimized and configured to different applications and operates with a high accuracy. The LT8390HUFD#TRPBF is an ideal solution for automotive applications such as BCMs, OBCs and ECUs.

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