LM2687MMX/NOPB

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LM2687MMX/NOPB Application Field and Working Principle

The LM2687MMX/NOPB is a single-chip, fixed frequency, step-down DC-to-DC regulator featuring synchronous Rectification, accurate current limits and thermal shutdown protection. It is designed to provide Power Management and Performance Enhancements in applications such as cellular phones, notebook and tablet computers, gaming consoles, and portable video and audio systems.

Application Field of LM2687MMX/NOPB

The LM2687MMX/NOPB is suitable for use with a wide variety of Power Management and Performance Enhancement applications. Its low quiescent current consumed, two high-accuracy current limits, a small package size, and low output voltage ripple, allow the LM2687MMX/NOPB to be used in applications where space and power conservation are of primary importance.

The high level of integration of the LM2687MMX/NOPB, including the integrated controller, switching regulator, and optional integrated inductor and filters make it ideal for use in high-efficiency, low-cost, point-of-load applications. The LM2687MMX/NOPB is also suitable for use in automotive applications where its high-efficiency combined with its 12-works operation capability makes it an ideal choice for supplying power to car electronics.

Working Principle of LM2687MMX/NOPB

The LM2687MMX/NOPB operates by driving a pair of power MOSFET switches at a fixed frequency. The input voltage is applied to the input of the LM2687MMX/NOPB, which is then regulated down to the required output voltage. The synchronous rectification performs an efficient conversion of the power from AC to the desired DC output voltage. The fixed frequency operation of the LM2687MMX/NOPB enables the design of external components to maintain a constant operating temperature.

The LM2687MMX/NOPB includes two adjustable current limit circuits that can be used to prevent the device from running away with an over-current. This feature helps to reduce the risk of potential thermal damage to the power components by reducing the load current when the load current reaches its threshold. The LM2687MMX/NOPB also includes a built-in overtemperature protection system that can be enabled to shut down the device when the input voltage exceeds a predetermined value.

Conclusion

The LM2687MMX/NOPB is designed to provide optimal Power Management and Performance Enhancements in a wide variety of applications. Its low quiescent current and high level of integration make it ideal for high-efficiency, low-cost, point-of-load applications such as cellular phones, notebook and tablet computers, gaming consoles, and portable video and audio systems. The LM2687MMX/NOPB features a fixed-frequency operation, two high-accuracy current limits, and a built-in overtemperature protection system that enable the designer to improve power efficiency and reduce system thermal design.

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