LM4040C25IDBZT

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	LM4040C25
Supplier Device Package:	SOT-23-3
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Current - Cathode:	80µA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	35µVrms
Series:	--
Temperature Coefficient:	100ppm/°C
Tolerance:	±0.5%
Current - Output:	15mA
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Fixed
Reference Type:	Shunt
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Power management integrated circuits (PMICs) are becoming an increasingly important component of today’s electronic systems, consolidating multiple power-related functions into a single device for more efficient and cost-effective operation. One such device is the LM4040C25IDBZT voltage reference, which is designed to provide precise and reliable voltage references in a wide variety of applications. This article will discuss the application field and working principle of the LM4040C25IDBZT voltage reference.

Application Field

The LM4040C25IDBZT voltage reference has a wide range of applications, including digital-to-analog and analog-to-digital converters, analog amplifiers, power supplies, battery management systems, and other systems where precise voltage regulation is required. It is also commonly used in medical, automotive, and industrial applications.The device is well suited for low-power and/or space-constrained applications, as it requires minimal external components and requires low power consumption (<2mW). It is also easy to use and provide excellent accuracy, making it a great choice for designers who need precise and reliable voltage references.

Working Principle

The LM4040C25IDBZT voltage reference is a precision voltage reference device that can provide a reliable regulated voltage output over a large industrial temperature range. The device operates on a common-emitter topology, and utilizes a small NPN transistor in the feedback loop to maintain a constant voltage output.The internal feedback loop is designed to maintain a constant output voltage when the input supply voltage or temperature changes. It achieves this by sensing the voltage at the output and varying the emitter current accordingly. As the emitter current increases or decreases, the voltage at the output will adjust to the desired level. This ensures that the voltage output remains accurate and stable to within a specified accuracy even when the input supply or temperature changes. The LM4040C25IDBZT is also designed to operate over a wide input voltage range, from 70mV to 36V. This makes it ideal for use in many applications where high input voltages might be encountered.The device also includes several diagnostic features, such as open-emitter, open-base and open-collector sensing circuits. These circuits detect any potential faults in the feedback loop and latch off the device if an error is detected. This ensures maximum reliability and protect the device from potential damage.

Conclusion

The LM4040C25IDBZT voltage reference provides designers with an easy-to-use, highly precise and reliable voltage reference for a wide range of applications. Its low-power and low-component-count makes it ideal for space-constrained and/or low-power systems. Its wide input voltage range, precise accuracy, and several diagnostic features ensure that the device can be used with confidence in any design.

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