LM3489QMMX/NOPB

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LM3489QMMX/NOPB is a voltage regulator and a DC DC switching controller that is used for specific applications and is a part of the PMIC (Power Management Integrated Circuit) family. It is a three-phase, synchronous buck controller that can deliver a maximum output current up to 6A and drives either N-channel or P-channel power MOSFETs. It also employs a built-in current-limiting protection and a tonal-accurate and fast transient response, while it also maintains a fixed voltage and current. The LM3489QMMX/NOPB is designed to offer an economical choice for high-efficiency, low-noise, and high-input voltage DC-DC converters with wide-bandgap devices.

The LM3489QMMx/NOPB is specifically developed for use in automotive applications, such as those in the field of industrial and consumer electronics, which requires a high efficiency and reliable operation. It is also suitable for Lithium-Ion battery applications, advanced telecom and VoIP modules, as well as laptops and data storage systems. The device also provides robust glitch and high EMI/EMC immunity, with a wide 6 V to 60 V input voltage range and a low standby power loss. The LM3489QMMx/NOPB also has a wide range of PWM clocks, adjustable reference clock and cycle-by-cycle current limit protection.

Working Principle:
The LM3489QMMX/NOPB operates on the principles of pulse width modulation (PWM) switching control, in which the input voltage is regulated as a function of the output voltage change. When the output voltage falls or rises, the LM3489QMMX/NOPB will adjust its output PWM frequency and duty cycle to maintain a constant output voltage. This process is done through voltage feedback, where the on and off times of the control signal are adjusted according to the amount of feedback received from the output voltage.

In addition, it features an integrated high-current Gate driver output, specifically designed for operation up to 8A of peak current and switching frequencies up to 2MHz. The PWM control block works by comparing the input voltage and the output voltage, and then adjusts its duty cycle accordingly, either increasing or decreasing it. The control loop also uses compensation techniques to ensure that the output voltage is only slightly affected when the load is changed.

The LM3489QMMX/NOPB also features a built-in current limit protection, which will reduce the output current when it exceeds the upper limit. The device also provides superior switching transient response and is designed to ensure that the load is not damaged due to excessive transient load.

Finally, the LM3489QMMX/NOPB has a wide operating temperature range of -40°C to +105°C, a maximum input voltage of 60 V, an output voltage range of 0.8 V to 28 V, and is rated for an operating current of 6 A.

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