Noise - 0.1Hz to 10Hz:	310µVp-p
Base Part Number:	LM4132
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Current - Supply:	100µA
Voltage - Input:	3.7 V ~ 5.5 V
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	20ppm/°C
Tolerance:	±0.05%
Current - Output:	20mA
Voltage - Output (Min/Fixed):	3.3V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The LM4132AMFX-3.3 is a voltage reference module used to produce a highly accurate, fixed voltage output over a wide range of operating conditions. It belongs to the family of Power Management Integrated Circuits (PMIC) and is applicable in aerospace, automotive, consumer and industrial applications. The module provides a reference voltage with a low temperature coefficient, over-voltage protection, and an integrated reference buffer that eliminates the need for external components.

Features of LM4132AMFX-3.3

The key features of LM4132AMFX-3.3 are listed below:• Low temperature coefficient of 0.7 ppm/°C.• High accuracy over temperature range of -40°C to +125 °C.• Reference voltage of 3.3V with a tolerance of 0.2%.• Input voltage range from 4.5V – 25V.• Outputs short circuit and over-voltage protection.• Integrated reference buffer eliminates the need for external components.• Modules to be used in commercial and industrial grade applications.

Applications of LM4132AMFX-3.3

The LM4132AMFX-3.3 can be used in applications requiring a stable voltage reference over a wide range of operating conditions. It is suitable for most types of industrial and consumer applications. Typical application fields can be divided in fields such as aerospace, automotive, consumer and industrial. Some of the common applications are:• Motor Control: LM4132AMFX-3.3 can be used in motor control applications to provide steady voltage reference.• Medical Devices: The module can be used in medical equipment for providing continuous and accurate references for analog and digital signals.• Mobile Devices: The module can be used in mobile devices for providing stable references to the digital electronics and for charging the batteries.• Industrial Control: The module is suitable for providing references to analog and digital signals for industrial control devices.

Working Principle of LM4132AMFX-3.3

The LM4132AMFX-3.3 is a voltage reference module that produces a highly accurate, fixed voltage output over a wide range of operating conditions. It utilizes a precision reference device with a low temperature coefficient, over-voltage protection, and an integrated reference buffer that eliminates the need for external passive components.The device consists of a voltage reference circuit, a high speed error amplifier, a low dropout regulator and over-voltage protection circuit. The reference voltage is derived from a bandgap voltage reference circuit. The bandgap voltage reference circuit supplies a reference voltage which is temperature-compensated. This reference voltage is then buffered by the reference buffer and fed to the error amplifier. The error amplifier compares the reference voltage to a voltage set point and provides an output signal to the low dropout regulator which, in turn, produces an output voltage that is a constant percentage of the reference voltage.The LM4132AMFX-3.3 also features a built in over-voltage protection circuit that will shut down the voltage regulator when the input voltage exceeds the maximum allowed value. This feature adds an additional layer of protection and helps to ensure the device is functioning properly and within specifications.

Conclusion

The LM4132AMFX-3.3 is a voltage reference module used to produce highly accurate, fixed voltage outputs over a wide range of operating conditions and is applicable in aerospace, automotive, consumer and industrial applications. The module provides a reference voltage with a low temperature coefficient, over-voltage protection, and an integrated reference buffer that eliminates the need for external components. The device operates based on a reference voltage sourced from a bandgap voltage reference circuit, and is then buffered by the reference buffer and fed to an error amplifier that compares the reference voltage to a voltage set point. The module also features a built in over-voltage protection circuit that will shut down the voltage regulator when the input voltage exceeds the maximum allowed value.

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