LM5117QPMHE/NOPB

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The LM5117QPMHE/NOPB is a High Efficiency DC/DC Synchronous Buck Controller designed for use in high current, low input voltage applications. This device has a wide range of applications in computing, industrial, automotive, communication, and consumer systems. It is an ideal device for powering multiple voltage rails from a single high voltage supply, such as from a centralized power device.The LM5117QPMHE is a low-voltage drop, synchronous buck controller that can drive up to 10A of load current. Its switching frequency has been improved to reduce EMI levels, while its optimized loop response can maximize efficiency and minimize output noise level. Besides its high efficiency, the LM5117QPMHE also provides a slew of integrated features, such as frequency spread modulation (FSDM), cycle-by-cycle current limit, over voltage protection and thermal shutdown, to ensure your system reliability and robustness.The LM5117QPMHE has two power stages: the high-side power FET and the low-side power FET. The high-side power FET is responsible for providing the power to the load. The low-side power FET is used as a synchronous rectifier, and allows the output voltage to be regulated even more precisely. The LM5117QPMHE also features high-side current sensing capability, which provides precise measurement of the output current. With this feature, the controller can make precise switch-mode power converter regulation, along with pre-defined effects such as output voltage and current limits.For efficient operation, the LM5117QPMHE features optimized loop compensation and a unique, integrated Soft Start and Line Transient Response circuit. The Soft Start feature provides a very fast start-up time of just 400µs, which makes it ideal for applications that require quick start-ups. The Line Transient Response circuit allows the LM5117QPMHE to maintain output voltage regulation in case of sudden load transients, eliminating the need for an external compensation network.In terms of protection, the LM5117QPMHE provides a wide range of integrated protection features, such as cycle-by-cycle current limit, voltage feed-forward, over voltage, under voltage, over temperature, and reverse-battery protection. Additionally, there is also an adjustable over current event lockout timer, which prevents sustained pulses from damaging the output.The LM5117QPMHE is designed for applications where high efficiency and precise voltage and current regulation are required. Moreover, its wide range of integrated features makes the LM5117QPMHE an ideal choice for applications where protection and precise regulation are important.

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