NCP717CMX180TCG

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Application Field and Working Principle of NCP717CMX180TCG

NCP717CMX180TCG is a Linear Voltage Regulator (LVR) product manufactured by ON Semiconductor. The device is designed to provide consistent and low-noise power supply for microcontroller, LED driver, RF transceiver, ADC, DAC and other low-power applications. It provides low dropout, low dropout voltage, small package and large current support.

Features of NCP717CMX180TCG

• Current support up to 180 mA
• Dropout voltage less than 0.475V
• High accuracy: 2% tolerance
• Operating temperature range from -40°C to +125°C
• Small package: TSOT-23-5L

Applications

• Telecom application
• HVAC application
• PLC controllers
• Fire and smoke alarms
• Safety testing.

Working Principle

The NCP717CMX180TCG is a low-voltage linear regulator operating with a maximum input voltage up to 5.5V and a maximum output voltage up to 3.3V. It uses the constant-voltage regulation method to output the constant voltage determined by the application. It controls the output voltage by comparing the amplifier-generated reference voltage and the internal error amplifier. It then turns on an switched transistor to control the output voltage of the linear regulator.

The NCP717CMX180TCG uses a pass transistor to maintain a constant output voltage to the load when the input voltage changes. It transmits the majority of its current using a series connection of an input Capacitor (CIN) to the output pins and a load capacitor (CL). It also routes the output current to the load using the output transistor. The load capacitor and the input capacitor form a low-pass filter, which reduces the sensitivity of the voltage regulator circuit to the noise and fast transients.

The NCP717CMX180TCG is used to control the output voltage of an AC or DC power supply to a fixed voltage. It uses a feedback circuit connected from the output to the error amplifier pin to control the output voltage. The error amplifier input is compared with the voltage reference to produce a control signal for the pass transistor. The output voltage is regulated to remain constant, even when the load or input voltage changes.

Conclusion

The NCP717CMX180TCG is a Linear Voltage Regulator designed to provide consistent and low-noise power supply for microcontroller, LED driver, RF transceiver, ADC, DAC and other low-power applications. It provides current support up to 180 mA, low dropout voltage of less than 0.475V and high accuracy of 2% tolerance. It is suitable for telecom applications, HVAC, PLC controllers, fire and smoke alarms, safety testing and other applications. It works by using a feedback circuit connected from the output to the error amplifier pin to control the output voltage.

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