NCP551SN25T1

NCP551SN25T1 application field and working principle

NCP551SN25T1 is an integrated linear voltage regulator from ON Semiconductor. It is classified as a member of PMIC(power management integrated circuit) - Voltage Regulator - Linear family. It is designed for the reliable,precise, and efficient operation of electronic devices, targeting the industrial and automotive applications.

Application Field

NCP551SN25T1 is suitable for the application that utilizes wide input voltage range of 4V - 40V, and it provides a desirable output voltage range of 1.2V - 25V. The extremely small footprint make it an ideal choice for applications requiring space-saving designs. The output voltage is adjustable, which makes the device flexible in different power requirements. It also features short circuit protection, current limit, thermal protection, and overvoltage protection. Therefore, NCP551SN25T1 is widely applied in industrial and automotive applications, such as point-of-load, battery charging, and LED lighting.

Working Principle

The linear voltage regulator of NCP551SN25T1 is a type of switch mode power supply that regulates the output voltage by using resistance. The circuit comprises of a P-channel MOSFET, a resistor, and a current-limiting circuit. When the device is turned on, the voltage drop in P-channel MOSFET set the voltage and current. The amplifier takes the feedback from the output voltage and compares it with the reference voltage and compensates the output voltage accordingly. Resistor and current-limiting circuit help to adjust the output current and prevent the excessive current flow.

Features

• Wide input voltage range (4V - 40V) and output voltage range (1.2V - 25V)
• Very small footprint (1.7mm x 2.5mm)
• Accurate and adjustable output voltage
• Limits inrush current
• Short circuit protection
• Both current and thermal protection enabled
• Minimum quiescent current (1µA)

Conclusion

NCP551SN25T1 from ON Semiconductor is a capable integrated linear voltage regulator targeted for industrial and automotive applications. It features wide input and output voltage range, adjustable output voltage, and various protection circuits. This makes it a suitable choice for applications requiring precision and efficiency.