NCP552SQ18T1

NCP552SQ18T1 is a type of linear voltage regulators (PMICs), which supports highest voltage up to 18V with power supply rejection rate of 65db typ. It is widely used in different application fields and is easy to use, making it suitable for various industrial, healthcare, automotive and consumer applications. This article aims to discuss the application field and working principle of NCP552SQ18T1.

Application Field:

NCP552SQ18T1 is widely used in many industries, such as automotive, industrial, healthcare and consumer. In automotive applications, it is used to regulate the different power supply voltages needed in engine control systems, such as ABS, traction control and electronic parking brake controls, as well as sensors and actuators in general. The linear voltage regulator is also often used in industrial applications where continuous regulation of the output voltage is needed for different purpose, such as controlling temperature or controlling the current in a circuit.

In healthcare applications, NCP552SQ18T1 is used to regulate the input power supply for medical equipment and devices, such as digital TVs and PC monitors, as well as other medical systems or devices that may require an external regulated power supply. In consumer applications, it can be used in small appliances to regulate the power supply voltage for microcontrollers or other embedded devices.

Working Principle:

NCP552SQ18T1 is a linear voltage regulator which uses a voltage reference to maintain a constant output voltage and current without impacting the input voltage. It actively controls the output voltage and current via a control loop, which is closed by a voltage reference, control amplifier, and error amplifier. The voltage reference acts as the setpoint, providing a stable reference voltage which is continuously monitored. The control amplifier amplifies the reference voltage and applies a varying voltage to the error amplifier. The error amplifier compares the output voltage with the reference voltage, and outputs a signal to the output stage so as to maintain the desired output voltage.

The output from the control loop is then amplified and sent to the output stage, which is usually a transistor or MOSFET connected in either series or parallel configuration. All the components connected in the control loop and the output stage regulate the output voltage. When the input voltage is higher or lower than the reference voltage, the control loop amplifies the error signal and increases or decreases the amount of current sent to the output stage to make the output voltage match the reference voltage. Thus, the output voltage can be maintained within a given tolerance band.

Conclusion:

In conclusion, NCP552SQ18T1 is a type of linear voltage regulator (PMICs) that is suitable for various applications such as automotive, industrial, healthcare and consumer. It uses a voltage reference and a control loop consisting of a control amplifier, error amplifier and an output stage to regulate the output voltage. This makes it highly reliable and easy to use, and thus, suitable for different applications.