LT3973HMSE-5#PBF

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Introduction

The LT3973HMSE-5#PBF is a 5A, non-synchronous buck converter with high performance features. It integrates a high-efficiency synchronous N-MOSFET and has wide input voltage range of 4.8V to 18V. It is suitable for applications that have high-power requirements. It also provides adjustable current limiting and a fast, low-power shutdown mode.

Application Field

The LT3973HMSE-5#PBF is a high-efficiency non-synchronous buck converter with a wide input voltage range that makes it suitable for a wide range of applications, such as power management systems, portable devices, and industrial control systems. It is also suitable for automotive, battery-powered systems, high-voltage and current, and high-efficiency lighting.

Working Principle

The LT3973HMSE-5#PBF utilizes a non-synchronous buck voltage conversion for efficient power conversion. It has a wide input voltage range of 4.8V to 18V and is capable of supplying a maximum output current of up to 5A. The device features an integrated N-MOSFET capable of operating at up to 99% efficiency and is further optimized to reduce power losses. Furthermore, it eliminates the need for external MOSFETs, thus making it easier to design.

The buck converter works by converting an input voltage to a lower output voltage as programmed. The input voltage is applied to the power stage which switches the N-MOSFETs at a frequency determined by the device\'s internal oscillator. The frequency of the internal oscillator can be adjusted according to the input voltage, thus allowing the device to operate over a wide input voltage range. When the output voltage drops below the desired voltage, the N-MOSFETs are switched on, and the input voltage is applied to the inductor. The inductor then releases the stored energy as the N-MOSFET is switched off, thus creating the desired output voltage.

The LT3973HMSE-5#PBF features an adjustable current limit, which allows the user to set the maximum current limit to prevent overloading and damage to the power stage. Additionally, the device also includes a fast, low-power shutdown mode for high current applications. This provides an additional level of protection for the device and helps reduce power consumption.

Conclusion

The LT3973HMSE-5#PBF is a high-efficiency, non-synchronous buck converter with a wide input voltage range of 4.8V to 18V and up to 5A of output current. It integrates a high-efficiency synchronous N-MOSFET and features adjustable current limit, low-power shutdown, and fast start-up times, thus making it suitable for many high-power applications. The device is also optimized to reduce power losses, allowing it to deliver high-efficiency operation.

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