NCP3218GMNR2G

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The NCP3218GMNR2G is one of the power management integrated circuit (PMIC) devices from ON Semiconductor Corporation. It belongs to the voltage regulators and special purpose category, specifically designed for automotive applications. It contains the most extended features and benefits specifically designed for the automotive environment.

The NCP3218GMNR2G is a high-current, high- efficiency synchronous buck converter in a tiny package. It is able to achieve a very low quiescent current and is capable of achieving up to 95% efficiency. It supports the most extensive range of input and output voltage. The device offers complete protection from overvoltage, undervoltage, overtemperature, short-circuit and overcurrent conditions.

The NCP3218GMNR2G can deliver up to 6A output current with an input voltage range of 5.5V to 28V. It operates in pulse-width modulation (PWM) mode to produce adjustable output voltage from 0.8V up to the input voltage. The switching frequency of the device can be adjusted from 200 kHz up to 1.2 MHz. It is possible to synchronize the switching frequency of the device with an external clock.

The working principle of the NCP3218GMNR2G is based on the synchronous buck (synchronous rectification) design. It can regulate the voltage by using the PWM technique. In PWM mode, the error amplifier compares the output voltage of the converter to the reference voltage and the output is adjusted accordingly.

The NMOS and PMOS transistors provide the main switching function of the regulator. The input voltage is applied to the inductor of the device and the current is increased in order to generate magnetizing energy in the core material. This process is known as the power conversion cycle. When the switch (NMOS) is turned on, the current flowing through the inductor is higher and magnetizing energy is built up in the core material.

When the switch (NMOS) is turned off, current starts to flow from the inductor to the output capacitor, resulting in the generation of the output voltage. The PMOS is used to provide low-side synchronous rectification, which improves the overall efficiency of the device. The output voltage of the NCP3218GMNR2G is controlled by the PWM modulator, which adjusts the switching frequency of the device and increases or decreases the inductor current.

The NCP3218GMNR2G is widely used in automotive applications such as powertrain, 48V mild hybrid, body electronics, lighting and infotainment systems. It offers several advantages over other voltage regulators, including excellent efficiency, low ripple, low quiescent current, small size, and high-power capability. It is an ideal choice for automotive applications where power efficiency, high power capability, and reliability are key.

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