SPX431AM1-L/TR Integrated Circuits (ICs)

Temperature Coefficient:	30ppm/°C
Supplier Device Package:	SOT-89-3
Package / Case:	TO-243AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TA)
Current - Cathode:	1mA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	--
Noise - 0.1Hz to 10Hz:	--
Series:	--
Tolerance:	±0.5%
Current - Output:	150mA
Voltage - Output (Max):	36V
Voltage - Output (Min/Fixed):	2.503V
Output Type:	Adjustable
Reference Type:	Shunt
Part Status:	Active
Packaging:	Tape & Reel (TR)

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SPX431AM1-L/TR, an adjustable shunt voltage regulator IC (also referred to as “voltage reference”), is a commonly used voltage reference IC that provides a stable reference voltage for various applications. It has a wide range of application fields and is suitable for many different applications.Applications and general featuresThe SPX431AM1-L/TR is a precision monolithic 2.97 V adjustable shunt regulator. It provides a wide range of voltage options, ranging from 2.9 to 15V, as well as low quiescent (IDD) currents and excellent load and line regulation.The SPX431AM1-L/TR is commonly used in audio and power amplifiers, power supplies and other power-related applications. It is particularly well suited for applications that require high accuracy and low power consumption and can be used in mobile/portable applications. It can also be used as a voltage reference in low voltage microcontroller (MCU) or analog-to-digital converters (ADCs). Additionally, the adjustable output voltage allows for a wide range of output voltages to be used for different applications.The SPX431AM1-L/TR has a few general features that make it an ideal choice in a variety of applications. First, it contains an overload protection circuit which allows it to protect the application from short circuit, overvoltage and overcurrent. Second, it has an adjustable voltage reference that can be adjusted in 1mV increments. Third, it has an ultra-low quiescent current (typical 0.3uA) that enables high efficiency designs.Working PrincipleThe SPX431AM1-L/TR operates based on a shunt voltage regulation mechanism. In this type of regulator, the output voltage is regulated by the current flowing through a shunt resistor. When the reference voltage is reached, the shunt resistor will start to dissipate energy in the form of heat and reduce the current flow, thus maintaining the output voltage.The output voltage is adjustable using a simple two terminal potentiometer. It can be adjusted up to a maximum of 15V with a range of 2.9V to 15V in 1mV increments. The output voltage is determined by the combination of the internal reference voltage and the potentiometer setting. The greater the resistance of the potentiometer, the higher the output voltage.ConclusionThe SPX431AM1-L/TR is a widely used voltage reference IC that provides a stable reference voltage for a wide range of applications. It has low quiescent current and adjustable output voltage, allowing it to be used in a variety of portable and low power applications. It operates on a shunt regulation principle and the output voltage can be adjusted in 1mV increments with a potentiometer. It also includes a protection circuit which reduces the current flow when an overload occurs. The SPX431AM1-L/TR is a great choice for any application that requires a stable adjustable voltage reference.

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