MCP1725T-3002E/SN

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MCP1725T-3002E/SN Application Field and Working Principle

MCP1725T-3002E/SN is a three-terminal adjustable linear voltage regulator with a wide input voltage range of 1.8V to 18V, featuring low quiescent current, low dropout voltage, fast transient response, and a wide output voltage range. It belongs to the voltage regulators family of the PMIC (Power Management Integrated Circuit), more specifically within the Linear category. As such, its applications are mainly related to high current voltage stabilizing, related to its low dropout, and it is adopted for a wide array of solutions for energy management.

MCP1725T-3002E/SN performs as a power source from a voltage source or from a battery, using the internal feedback voltage to accurately monitor and regulate output voltage over a wide input voltage range. It includes internal current limit circuitry and thermal shutdown protection, with minimal external components ensuring the highest possible output current. This makes it perfect for environments where low-voltage, high-current and constant voltage monitoring over a long period is key.

Basically, the working principle of MCP1725T-3002E/SN is based on comparisons between a reference voltage and an error voltage, taking as input the current flowing through the regulator output terminal. When the input is greater than the reference voltage, the regulator will produce an output proportional to the error voltage and when the error voltage is greater than the reference voltage, the output will become smaller, providing a voltage regulation.

To better illustrate the working principle, let us consider then an example: a stabilizing circuit with a variable input voltage of 9V – 18V and an output voltage of 5V. The current output of the circuit is established following a series of steps: the adjustment pin is grounded, the output voltage of the circuit is set, the enable pin is fully opened and the input voltage is set to the maximum value. Then, the voltage at the output pin is read and compared with the reference voltage. If the voltage is greater than the reference voltage, the current output is increased and the adjustment pin is opened. If the voltage is smaller than the reference voltage, the current output is decreased and the adjustment pin is reduced.

This output voltage regulation is done constantly, even if the input voltage drops slowly, so long as the circuit continues to receive power. For example, with a fixed 9V input, the MCP1725T-3002E/SN will be able to accurately provide 5V at the output, the same 5V that would have been provided with an 18V input. This versatility makes MCP1725T-3002E/SN perfect for any application that requires a reliable, accurate and high-performing linear voltage regulator in an environment with a wide input voltage.

Hence, MCP1725T-3002E/SN provides a wide array of advantages, such as low drops of the output voltage, increased efficiency, large operating temperature range, low quiescent current and fast transient response. It is ideal for complex consumer, automotive and industrial applications that require reliable and accurate voltage regulation, like microprocessors, digital-to-analog converters, analog-to-digital converters and sensor interfaces. Therefore, MCP1725T-3002E/SN stands as a great pick for two-terminal adjustable voltage regulators, delivering high precision, reliability and high performance that is capable of supporting demanding applications.

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