LM3674MF-2.8 Integrated Circuits (ICs)

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LM3674MF-2.8 Application Field and Working Principle

Introduction to LM3674MF-2.8

LM3674MF-2.8 is a PMIC (Power Management Integrated Circuit, or simply IC) designed to provide efficient and reliable power conversion. It belongs to the Voltage Regulators family, more specifically the DC DC Switching Regulators. The LM3674MF-2.8 has the capability of driving 3-Amp loads to 18V with up to 85% efficiency over a wide range of input and output voltages. It provides adjustable current limits, short circuit protection, auto thermal shutdown protection and can be synchronized to a 500kHz clock to meet the needs of advanced system designs.

Applications of LM3674MF-2.8

This IC is a must-have component for anyone looking for an efficient way to regulate, protect and extend the life of electronic components in their design. It is the perfect choice for a wide range of applications from consumer to industrial, from embedded and PC motherboards to specialized commercial, automotive, aerospace and military solutions. The LM3674MF-2.8 is not only a great choice for point-of-load regulator designs, but also for applications such as synchronous buck converters, DC/DC regulators, DC/AC regulators, as well as AC/DC power supplies.

Working Principle of LM3674MF-2.8

Under voltage and current limit protection, the LM3674MF-2.8 regulates the output voltage by controlling the duty cycle of a high frequency, fixed-frequency, low-side MOSFET switch. This high frequency switch is driven by the internal oscillator of the IC and regulated through the PWM control logic. A standard logic input signal can be supplied to the duty cycle control pin to adjust the switching duty cycle in analog to the output voltage regulation.

The LM3674MF-2.8 integrates all the necessary features for modern DC/DC regulators. It features programmable features such as frequency, current limit, soft-start and control via an external clock signal input. It also features auto thermal protection, which safeguards the IC from excessive thermal stress and provides greater reliability in high temperature environments.

The LM3674MF-2.8 has an adjustable switching frequency from 500kHz to 2MHz and is capable of handling output power levels up to 18V and 3A. Its synchronization mode allows it to use external clock signals to regulate the switching of the internal switch, which is useful in more complex power supplies and when implementing phase-shifting techniques in Buck converter designs.

The LM3674MF-2.8 can be used for a wide range of applications that require regulated DC/DC conversion, such as power supplies for mobile phones, smart meters, communications systems and industrial systems. It is also a great choice for automotive applications due to its high efficiency, low quiescent current, wide input and output voltage range, and advanced protection circuits.

Conclusion

The LM3674MF-2.8 is a high performance DC/DC regulator designed to provide high efficiency, low operating current and wide input and output voltage range. It is suitable for a wide range of applications, from consumer to industrial applications. It has a wide range of synchronization and protection features such as over voltage and current limit protection, auto thermal shutdown and adjustable current limits. It provides adjustable current limits and short circuit protection to ensure efficient and reliable power conversion.

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