LM4132EMFX-3.0

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The LM4132EMFX-3.0 is a member of the high performance family of voltage references from Texas Instruments, and is categorized under their PMIC (Power Management Integrated Circuit) Voltage Reference series. It has versatile features and is applicable in many design applications and it works on the basic principles of voltage regulation. This article will discuss the application field and working principle of the LM4132EMFX-3.0.

Application Field

The LM4132EMFX-3.0 from Texas Instruments is a high-performance voltage reference IC in the PMIC Voltage Reference Series. It is specifically designed with low quiescent current and wide operating temperature range that is suitable for industrial and consumer electronics with multiple voltage regulation requirements. This device is ideal for use in battery-powered and hand-held electronics and in advanced power management systems.

The LM4132EMFX-3.0 is designed for low power applications, with low quiescent current and wide operating temperature range. It has a wide operating voltage range between 1.5V and 10V, which makes it suitable for a variety of applications and economic designs. The output voltage is regulated at its nominal 3.0V, with very low drift over temperature changes and flicker noise present. It also has very fast start-up characteristics, with spec- guaranteed rise time as low as 2.5ns.

The device provides excellent output accuracy, with a typical accuracy of ±0.1% (7mV). This allows designers to reduce power consumption and make their designs more reliable and accurate. The device can also be powered from both a battery or a regulated power supply, allowing portable designs and applications where power supply is limited to be capable of using the voltage reference IC.

The LM4132EMFX-3.0 is housed in a small, industry-standard µMAX 8-pin package, with a size of only 0.195”x0.195”. This makes it suitable for all types of design applications, particularly in space-constrained applications, such as those found in portable electronics. The device is RoHS compliant and the maximum junction temperature of 125°C allows the IC to be used in harsh environments, such as industrial and automotive applications.

Working Principle

The LM4132EMFX-3.0 utilizes an active regulation technique and a positive charge pump to regulate the output voltage. It works by controlling the current between the collector and the emitter of an external NPN transistor, and thus controlling the output voltage. This active regulation ensures that the output voltage is accurately regulated, with very low drift over temperature changes, and a typical accuracy of ±0.1%.

The device also works on the principle of flicker noise reduction. Flicker noise is a form of voltage noise that is created by the abrupt changes in the base current of the BJT, as a result of variations in the output voltage. The LM4132EMFX-3.0 implements an analogous circuit that uses a feedback loop to reduce these voltage fluctuations and ensures that the output voltage has very low flicker noise present. This makes it suitable for signal and RF applications that require low noise performance.

The device also utilizes a low quiescent current, which is typically 15µA. This allows the IC to be used in low power, portable designs and applications that have limited power supply. In addition, the device can be powered from both a battery and a regulated power supply, making it suitable for designs where power supply is limited.

Conclusion

The LM4132EMFX-3.0 from Texas Instruments is a member of the PMIC Voltage Reference series and is designed specifically for low power and reliable voltage regulation applications. It has a wide operating voltage range, a low quiescent current, and an active regulator circuit and feedback loop that reduce flicker noise. It is suitable for advanced power management systems, battery-powered and hand-held electronics and other designs with space constraints. This article has discussed the application field and working principle of the LM4132EMFX-3.0.

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