LT3680EDD#TRPBF

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Introduction: The LT3680EDD#TRPBF is a synchronous step-down DC-DC converter which supports high output current and high efficiency operation. It features a low-side power switch and utilizes a unique “phase-shifting” architecture to provide a higher output current rating as compared to many other available monolithic switching converters. With its integrated power stages, the LT3680EDD#TRPBF simplifies the design of high-efficiency, 6 to 60V input voltage, high output current application.

Application Field: The LT3680EDD#TRPBF is ideal for a variety of applications such as automotive infotainment and accessory systems, test instrumentation, industrial/industrial automation, distributed power systems, avionic systems and medical equipment.

High Efficiency: With its optimized synchronous rectification, high frequency operation and fine-tuned current-mode control loop, the LT3680EDD#TRPBF is able to achieve high efficiency over wide input and output voltage and load ranges. Its junction temperature can be kept low even at high output current, making it an excellent choice for high-power and very low-output voltage applications where efficiency is critical.

High Current Capability: The LT3680EDD#TRPBF has a wide operating input voltage range that enables up to 8.2A peak output current. Its integrated lowside power switch can provide up to 10A peak current, with a large enough external power stage. The device is able to deliver output power up to 120W, which is well-suited for a number of applications, including those that require high current.

Integrated Features: The LT3680EDD#TRPBF includes an integrated soft-start, output over-current and thermal protection, making it an ideal solution for high power applications. Its built-in anti-ringing circuit reduces EMI generated at the input and load in switching applications. The device also features a dedicated standby pin that allows the external power switches to be powered down to reduce overall power consumption in standby mode.

Working Principle: The LT3680EDD#TRPBF operates by controlling a synchronous buck switch to adjust the output voltage. The buck switch is a MOSFET that is driven by the built-in oscillator, generating a square wave that determines the duty cycle. This duty cycle is regulated by adjusting the on-time of the MOSFET, thereby controlling the output voltage. The LT3680EDD#TRPBF also features a current-mode control loop, which allows it to quickly respond to changes in load and input voltage. This enables the converter to maintain a constant, accurate output voltage.

Conclusion: The LT3680EDD#TRPBF is an efficient, high-current synchronous buck DC-DC converter, which makes it ideal for a wide range of applications. Its integrated features, such as soft-start and over-current protection, simplify the design process and make it an excellent choice for applications that require high efficiency and power.

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