LM4050QBEM3-10/NOPB

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Power management integrated circuits (PMIC) serve as an essential component in most of the modern electronics and are responsible for regulating and providing power to applications. Voltage references are a subset of PMIC that provide highly accurate and stable reference voltages for numerous applications such as DC/DC converters, analog-to-digital converters and precision amplifiers. This article focuses on the application field and working principle of one particular type of voltage reference – the LM4050QBEM3-10/NOPB.

Overview

The LM4050QBEM3-10/NOPB is a voltage reference manufactured by Texas Instruments. It is an ultra-precise micropower 5.000 volt (V) bandgap reference in tiny leadless SOT23-5 and SOT23-6 packages. The device uses a multiple transistor core to generate a precision bandgap voltage reference independent of power-supply variations, environmental changes and aging. This makes it suitable for applications that require an ultra-precise reference in minimal form factor.

Application Field

The LM4050QBEM3-10/NOPB can be used in a number of applications, such as:

• Battery-operated systems
• Portable medical equipment
• Process control
• Instrumentation
• Data acquisition systems
• Lighting control
• Automotive systems

It can be used as a single nanovolt/microvolt-accurate level adjuster in precision analog systems and as a base reference in Programmable Logic Controllers (PLCs). It is also suitable for general digital logic voltage level shifting applications.

Working Principle

The LM4050QBEM3-10/NOPB generates a bandgap voltage reference with its multiple transistor core, consisting of nine bipolar transistors, four current mirrors, two series-current sources, one reference voltage and one output-offset voltage. The device operates the core using four key features: Temperature independent reference output, temperature tracking, external capacitance and internal startup current.

Its temperature independent reference output offers reliable performance in various ambient temperatures, while its temperature tracking feature offers precision and accuracy across a wide range of temperature. The external capacitance of the device optimizes the overall performance by cancelling out the effects of temperature changes on the device capacitance. Lastly, the internal startup current feature reduces the device power-up time.

The LM4050QBEM3-10/NOPB is also equipped with several protection features such as short-circuit protection, thermal shut down and reverse battery protection. These features offer extra safety for the device and protect it from potential damages.

Conclusion

The LM4050QBEM3-10/NOPB is an efficient and precise voltage reference with a wide range of applications. It uses a multiple transistor core to generate highly precise bandgap voltage references and has several protective features which make it reliable and robust. It is ideal for applications that require precision and minimal form factor.

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