LM4040BEM3-3.0+T Integrated Circuits (ICs)

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Power management integrated circuit (PMIC) is an integrated circuit that serves the purpose of managing the power supply of a specific electronic system. volTage reference (VREF) is one type of PMIC that helps to maintain and control the voltage output of the system, so it can run efficiently and accurately. A good example of a VREF PMIC is the LM4040BEM3-3.0+T.

The LM4040BEM3-3.0+T PMIC is a precision micropower, low dropout voltage reference/shunt voltage reference. It is designed to provide a stable and accurate output reference voltage (1.23V to 1.5V) in order to regulate and adjust the voltage output of a system. This PMIC operates with a wide input voltage range of 2V to 20V and can handle up to 2.5A current overloads, making it ideal for applications in systems that require high input power and frequent load current transients.

The LM4040BEM3-3.0+T has a low output voltage noise of approximately 0.1mV peak to peak, and temperature stability of 3ppm/°C over a range of -40°C to 125°C. This makes it a perfect choice for applications where there is a need for tight and accurate voltage regulation and noise reduction. Furthermore, the LM4040BEM3-3.0+T’s internal circuitry is designed to be extremely reliable, with thermal shutdown, overvoltage protection and overtemperature protection, making it an ideal choice for portable systems and other applications that require robust performance in harsh operating environments.

The LM4040BEM3-3.0+T voltage reference PMIC finds its applications in various systems, such as portable or mobile batteries, power supplies, barcode scanners, battery-operated and LED lighting, automatic meter reading (AMR) systems, and any system that requires accurate and stable voltage output.

The working principle of the LM4040BEM3-3.0+T PMIC is quite simple. To create an output voltage reference, an external resistor is needed. Current flows through the external resistor, connecting it to the reference voltage pin. This causes the voltage across the resistor to rise. The rise in voltage causes the internal transistor to conduct and current is drawn into the output pin, creating a voltage reference. This voltage reference remains constant even when the input voltage or load changes.

The LM4040BEM3-3.0+T PMIC provides a stable and accurate output voltage, high accuracy over temperature and voltage ranges, and excellent output noise performance, making it a perfect choice for applications that require precise voltage regulation and control. Its wide input voltage range, high current overloads tolerance, and several robust protective features make it suitable for harsh operating environments, such as portable systems and AMR systems.

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