LT8471HFE#PBF

PMIC-Voltage Regulators-DC DC Switching Regulators

The LT8471HFE#PBF is a high-efficiency, synchronous DC-DC step-down converter controller operating over a wide input voltage range. The switching frequency of the device can be programmed up to 1MHz and can be synchronized to an external oscillator. The device is designed to drive two N-channel power MOSFETs and works over a wide input voltage range of 3.2V to 30V. It operates in continuous conduction mode with high-side and low-side current sense elements.

Features

• Wide Input Voltage Range: 3.2V to 30V
• Programmable Output Current Limit
• Frequency Operation: Up to 1MHz
• Precise On-Time Duration
• Continuous Conduction Mode
• High-Side and Low-Side Current Sense Elements

Application Fields

The LT8471HFE#PBF is used in a variety of applications ranging from automotive, industrial, and consumer electronics. It is suitable for applications where a regulated and well-controlled output current is required. The device is used in high-power automotive and industrial DC-DC buck applications, where a synchronous-rectified architecture is required. It can also be used in LED driver applications, providing a highly efficient current source. The device is also used in laptop and desktop computer power supply.

Working Principle

The LT8471HFE#PBF is a synchronous DC-DC step-down controller operating over a wide input voltage range. It works by opening and closing MOSFETs at a high frequency, either Step-Down or Step-Up, to regulate the output voltage. The device is capable of working up to 1MHz, making it suitable for heavily loaded applications. The device can also be used in Vital-Sensing Mode, where the output voltage is monitored through an opto-coupler. This makes the device suitable for high-density point of load applications.

The device\'s on-time duration and frequency can be programmed through the use of an inductor and feedback components. This allows for different output currents and voltages to be efficiently produced, resulting in increased power conversion efficiency. The device can also be synchronized to an external signal and can be used to drive Power MOSFETs on both the high and low sides. This makes it suitable for multiple topologies, including buck and boost converters.

Conclusion

In conclusion, the LT8471HFE#PBF is a high-efficiency, synchronous DC-DC step-down converter controller operating over a wide input voltage range. It can be programmed and synchronized to produce a wide range of output currents and voltages. It is designed to drive two N-channel power MOSFETs and can be used in various applications such as automotive, industrial, and consumer electronics. The device is capable of providing increased power conversion efficiency and making it suitable for high-density point of load applications.