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NCV4264-2CST33T3G: Application Field and Working Principle

NCV4264-2CST33T3G is a voltage regulator in the category of PMIC (Power Management Integrated Circuit), more specifically, a Linear Voltage Regulator. Manufactured by ON Semiconductor, it is part of their family of Automotive Voltage Regulators, and is suitable for use in automotive applications.

Features of NCV4264-2CST33T3G

The NCV4264-2CST33T3G provides a wide range of features, such as:

• Output voltage range of 0.8V to 12V
• Over-voltage protection (OVP) and reverse voltage protection
• High PSRR and low noise output voltage
• High current output capability (3A)
• Output current limit protection and thermal shutdown
• Low quiescent current and high efficiency (up to 90%)
• Stable operation over wide temperature ranges
• High power supply rejection ratio (PSRR)
• Industrial and automotive SOIC-8 package

Applications of NCV4264-2CST33T3G

The primary application of NCV4264-2CST33T3G voltage regulator is automotive, specifically automotive lights, speed controllers, and air conditioning systems. Furthermore, it is also suitable for industrial lighting systems and general electronic systems, given its wide range of features and high efficiency.

Working Principle of NCV4264-2CST33T3G

The NCV4264-2CST33T3G voltage regulator works on the principle of difference in electrical potentials/voltage. This voltage regulator provides an output voltage that is equal to the input voltage minus a small drop, typically 0.8V. The device is designed to pass a maximum of 3A of current.

The device utilizes two external resistors that are used to set the output voltage. The voltage drop between the input and the output is effected by these two resistors. The resistance values for the external resistors can be calculated using the following formulas:

• R1 = (Vin - Vout) / Iout
• R2 = R1 * (Vout / 0.8V)

It is also important to note that the stabilizing capacitor needs to be chosen based on certain conditions. Stabilizing capacitors are used to minimize voltage fluctuations and ripple over various load conditions. The capacitance of the stabilizing capacitor must be calculated using the following formula:

• Cstabilizing = (Iout * 10uF) / Vripple

The device also features several protections such as over-voltage (OVP), reverse voltage, output current limit, and thermal shutdown. The Over-voltage (OVP) protects the device against voltage spikes, while the reverse voltage protection guards the device from abnormal polarity in the input voltage. The output current limit protects the device from load currents that may create dangerous levels of heat, and the thermal shutdown feature provides temperature protection.

Conclusion

In conclusion, the NCV4264-2CST33T3G voltage regulator is a linear voltage regulator that is ideal for automotive and industrial applications. It is suitable for providing high-current outputs with low ripple, and its various safety features (such as OVP, reverse voltage protection, current limit protection, and thermal shutdown) greatly enhance the reliability of the device. This makes it an ideal choice for automotive and industrial applications.

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