LM2940IMPX-10/NOPB

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The LM2940IMPX-10/NOPB is an integrated linear voltage regulator that is part of the Texas Instruments’ Power Management Integrated Circuit (PMIC) family–specifically categorized into Voltage Regulators–Linear. The integrated circuit specializes in providing a range of regulated output voltages that can carry high power rating and feature a minimum output voltage range of 10V (for a low-dropout voltage regulator) and a maximum output voltage range of 15V, while also boasting low operating current. This makes the LM2940IMPX-10/NOPB an ideal choice for any application that requires precise, reliable and adjustable voltage regulation, over a wide range of output currents.

The LM2940IMPX-10/NOPB consists of several important components, not limited to the output voltage control, linear regulator, thermal-limiter, voltage-referencer, and a power transistor. To begin with, the output voltage control utilizes a continuously adjustable ‘divided-down’ scheme, referred to as the ‘Divider Ratio’, to control and maintain the output voltage. This is done by varying the voltage between the adjustment terminal and the output using a single external resistor. To prevent any over-voltage and inaccurate readings, the linear regulator incorporates Linear Error Correction and MOSFET Output Protection Features, to both monitor and protect the output voltage. This ensures efficient voltage regulation without any overvoltage or reverse-polarity outputs.

Another useful feature of the LM2940IMPX-10/NOPB is its thermal-limiter. This allows the voltage regulator to safely continue to supply the output with power by activating the internal thermal-limiter to cut off or reduce the output voltage as necessary, for efficient temperature sensing and thermal protection. Furthermore, the integrated circuit’s voltage-referencer allows the regulator to accurately and precisely adjust the output voltage with reference to a preset internal reference voltage (VREF). Lastly, the power transistor is used to efficiently transfer the input power to the output. This increase the output current rating, while at the same time maintaining high efficiency and low dropout voltage.

These features makes the LM2940IMPX-10/NOPB a highly desirable device for a variety of applications. It is commonly used as an ultra-low noise linear regulator to power sensitive microprocessor-based systems, digital logic circuits, television/audio amplifiers, and communication circuits, among many other devices. In addition, its large output-voltage range and low operating current ensure its versatility and ability to accommodate most any requirement. Hence, the LM2940IMPX-10/NOPB presents a viable solution for regulating power in any application.

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