NCP562SQ18T1G

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NCP562SQ18T1G is an integrated linear voltage regulator of Fairchild Semiconductor released in 2018. This voltage regulator is widely used for various applications, such as providing a constant voltage source for embedded system, providing precise and low noise power supply for audio devices or communication devices, or replacing discrete linear regulator. The following parts will introduce how NCP562SQ18T1G works and its application field in detail.

Overview

NCP562SQ18T1G is a monolithic constrol module in a SOT-23-6L package. The chip is made up of an internal voltage reference, fixed frequency oscillator, error amplifier, voltage regulator, and output power pass device. It employs a precision voltage reference to construct a voltage regulation loop to compare the output voltage with the preset value and generator the exact output voltage. Besides, it features high current operation, overload protection and UVLO protection, which makes it can be used in applications requiring protection and temperature compensation.

Working Principle

The working principle of NCP562SQ18T1G is as follows. First, the internal precision voltage reference voltage is used to generate the preset reference voltage. Then, the feedback voltage from the output is compared with the reference voltage. When the feedback voltage is greater than the reference voltage, the transconductance amplifier will generate a command voltage to reduce the loop voltage. On the contrary, if the feedback voltage is less than the reference voltage, the transconductance amplifier will generate a command voltage to increase the loop voltage. When the two voltages meet each other, the loop is closed and the output voltage is stabilized.

Features

Here are the features of NCP562SQ18T1G.

• Input voltage range is up to 18V
• Output voltage is adjustable between 0.8V and 18V
• Minimum output load current is 800uA
• Maximum output current is 800mA
• Minimum output voltage drop is 340mV
• Output current limit is adjustable
• Internal temperature compensation to ensure stability
• SO-8 package available

Application Field

NCP562SQ18T1G is applicable for the following conditions.

• Voltage regulator for embedded system
• Low noise power supply for audio device
• High dynamic response for communication device
• Replacement for discrete linear regulator

Conclusion

NCP562SQ18T1G is a linear voltage regulator with push-pull output and adjustable output current limit can be used in various applications such as providing a constant voltage source for embedded system, providing precise and low noise power supply for audio devices or communication devices, or replacing discrete linear regulator. It features high current operation, overload protection, and UVLO protection, which makes it suitable for applications requiring protection and temperature compensation.

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