VT2491AFCX-ADJ

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VT2491AFCX-ADJ Application Field & Working PrincipleLinear voltage regulators are one of the most common types of power management components and are used to either step up or step down voltage levels from a single source. They often come in the form of either an internal or external component. In the case of the VT2491AFCX-ADJ, it is an external, low-dropout (LDO) linear voltage regulator.The VT2491AFCX-ADJ is designed to regulate a wide input range, between 3.2V to 6.0V, to a lower output voltage of 1.8V ± 2% variation. It also has a low quiescent current of 0.2uA and a high power supply rejection of 65dB. This makes it suitable for powering a wide range of low-power circuits, such as field-programmable gate arrays (FPGA) and power amplifiers. It also features a wide operating temperature range from -40 to +85C.The VT2491AFCX-ADJ is an adjustable regulator and works by taking a higher input voltage, such as 5V and regulating it down to a lower output voltage such as 3.3V. This is done through a series of components, such as a reference voltage, regulator and error amplifier, which are used to monitor the output voltage and adjust the input voltage as necessary.The reference voltage is used to set the output voltage desired and is typically an integrated circuit (IC) with a specific resistance or capacitance. The regulator then works by taking the reference voltage and passing it through a series of components which limit the current to the regulated voltage.The error amplifier is used to monitor the error between the regulated output voltage and the reference voltage. Any difference in the reference voltage and the regulated output voltage is amplified up and passed to the regulator to make corrections to maintain the desired voltage. In doing this, the error amplifier also monitors and corrects any changes or drops in input voltage.Overall, the VT2491AFCX-ADJ is an external, low-dropout, linear voltage regulator that provides a regulated output voltage of 1.8V ± 2% variation. It is equipped with features such as low quiescent current, wide input range and high PSRR, making it suitable for powering a range of low-power circuits. Its adjustable nature also makes it suitable for power management applications that require a variable output voltage.

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