LM4040CEM3-2.1+T

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Power Management Integrated Circuit (PMIC) technology has become increasingly important due to the proliferation of important and complex applications in the consumer and commercial marketplace. These applications require multiple complex voltage, current and power configuration requirements that can be fulfilled through PMICs. The LM4040CEM3-2.1+T is a reference voltage source used with technology solutions developed by Texas Instruments.

The LM4040CEM3-2.1+T is a low dropout, low power and noise optimized reference voltage source designed for precision applications. It operates from an input voltage range of 1.4V to 5.5V and provides a fixed 2.1V output voltage. The device has an output accuracy of ±2% over the full input voltage spectrum and a temperature range of -40°C to 85°C. The device is a CMOS power management integrated circuit (PMIC) with a low quiescent current and a fast start-up time.

The LM4040CEM3-2.1+T device provides a precision voltage reference for applications requiring high accuracy and low noise. The device can be used in many applications, including portable battery-powered devices; medical, telecommunications and industrial products; portable computing and instrumentation systems; and measuring and processing semiconductor devices. It is also used in many consumer electronics applications such as portable audio players, digital cameras, and personal digital assistants (PDAs).

The working principle behind the LM4040CEM3-2.1+T is based on a low dropout transistor-capacitor network. This network actively controls the output voltage by dynamically adjusting the current through the transistor. When the input voltage increases, the current through the transistor increases, reducing the voltage across the transistor and thereby increasing the output voltage. When the input voltage decreases, the current through the transistor decreases, raising the voltage across the transistor and thereby reducing the output voltage. This ensures that the output voltage is always kept at the same level regardless of input voltage variation, making it ideal for precision voltage applications. This device also utilizes an on-chip voltage regulator which reduces output voltages down to a stable level to maintain the output reference accuracy.

In summary, the LM4040CEM3-2.1+T is a precision voltage reference PMIC designed for low-noise, low-power and high-accuracy applications. It operates from an input voltage range of 1.4V to 5.5V and provides a fixed 2.1V output voltage. The device is a low dropout transistor-capacitor network based device that actively controls the output voltage by dynamically adjusting the current through the transistor. It also utilizes an on-chip voltage regulator for output voltage stability. The LM4040CEM3-2.1+T is used in many applications and is ideal for portable battery-powered devices, medical, telecommunications and industrial products, portable computing and instrumentation systems, and measuring and processing semiconductor devices.

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