CMPWR280TN

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CMPWR280TN Application Field and Working Principle

A PMIC, or power management integrated circuit (IC), is an integrated circuit (IC) that contains the necessary components to support, monitor and manage power in electronic systems. Voltage regulators, one type of PMIC, provide a regulated output voltage from an unregulated input voltage. Specifically, linear voltage regulators are typically used to maintain a constant voltage supply with a lower available current than non-linear voltage regulators. This article explores the application field and working principle of the CMPWR280TN - a 3.3 V linear low dropout regulator.

Application Field

The CMPWR280TN is rapidly gaining traction in the electronics market due to its ease of use and numerous applications. It is a versatile, adjustable low-dropout voltage regulator that allows for a wide range of input voltages. This make it well suited for powering multiple devices such as microcontrollers, sensors and other electronic components that require a regulated 3.3V output. Due to its ultra-small package size, it is also popular for use in applications that require board space optimization, such as IoT and mobile devices.

Working Principle

The CMPWR280TN voltage regulator consists of two basic components that work together to stabilise the output voltage: a pass element and a feedback element. The pass element is responsible for providing the output current to the load and is usually composed of a power transistor or a switch. The feedback element is responsible for measuring the output voltage and controlling the pass element to achieve and maintain the desired output voltage. Once the input voltage exceeds the threshold voltage, the regulator will begin to modulate the resistance of the pass element, allowing the output voltage to be regulated.

The CMPWR280TN also has an adjustable output voltage, allowing the user to set the output voltage to any value between 1.8 V and 6V. This is made possible by an onboard feedback divider, which allows for a precise adjustment of the output voltage to suit the application. The output voltage is also monitored and regulated by an onboard error amplifier, which compares the voltage on the feedback pin with a reference voltage to maintain a stable output voltage.

Conclusion

The CMPWR280TN is a versatile linear low dropout voltage regulator ideal for powering multiple devices and other electronic components that require a regulated 3.3V output. Its adjustable output voltage and ultra-small size make it an ideal choice for applications that require board space optimization, such as IoT and mobile devices. Its working principle is based on a pass element and feedback element that work together to maintain a stable output voltage, as regulated by an onboard error amplifier.

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