LM3679UR-1.8/NOPB

PMICs, or Power Management Integrated Circuits, are essential components in electronic applications. They are used to control and maintain voltage and current levels within a circuit, as well as to provide power for integrated circuits, in order to ensure the reliability and performance of the system. Voltage regulators such as the LM3679UR-1.8/NOPB are used to manage the voltage levels in a system and to provide low noise - transitions between voltage levels. This type of voltage regulator is known as a DC-DC switching regulator. In this article, we will discuss the LM3679UR-1.8/NOPB application field and working principles.

The LM3679UR-1.8/NOPB is a high-voltage buck converter switch mode regulator. It is designed for consumer applications, including smart meters, mobile phones, and digital still cameras. The regulator has a wide input voltage range of 3V to 59V and is capable of delivering up to 8A of output current. It is capable of producing an output voltage of 1.8V. The regulator also features an enable pin that provides an under-voltage lockout threshold, as well as thermal protection.

The working principle of this regulator is based on the Buck topology. In this type of topology, the input voltage is converted to a lower output voltage, by switching a switch at a high frequency. The high frequency of the switching causes the energy stored in the inductor to be transferred to the output voltage. This is done by alternately connecting the inductor to the input and the output voltage. When the inductor is connected to the input voltage, energy is stored in the inductor in the form of a magnetic field. When the inductor is connected to the output, the energy stored in the magnetic field is transferred to the output voltage, thus providing the required output voltage.

The LM3679UR-1.8/NOPB includes additional features such as integrated high-side and low-side MOSFETs to allow for synchronous rectification, which improves efficiency. It also includes an internal soft-start which increases the transformer current incrementally during start-up, and eliminates the need for an external soft-start circuit. Furthermore, the regulator includes a current sense resistor for monitoring the output current, and for setting the current limit.

The LM3679UR-1.8/NOPB is a high-power, high-current PMIC designed for a wide range of applications. Its versatility and efficiency make it an ideal solution for applications such as smart meters, mobile phones, and digital still cameras. Its Buck topology is capable of delivering high-precision output voltage control and low noise - transitions between voltage levels. In addition, the regulator includes an array of features including integrated MOSFETs, an internal soft-start, and a current sense resistor, which make it a suitable option for a wide array of applications.