TL431ACLPE3

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The TL431ACLPE3 is a three-terminal adjustable shunt regulator from Texas Instruments. This device is designed to provide a reference voltage of between 1.25 and 30V with a 0.2% initial accuracy and a 0.4% temperature coefficient. It is optimized for applications such as current limiting, battery charger regulation, and overvoltage protection.

The TL431ACLPE3 is part of the voltage reference family of linear voltage regulators, which are designed to provide a stable reference voltage for use in analog circuitry for power management applications. Voltage references offer a stable voltage over a wide temperature range and under varying circuit conditions. They are commonly used as reference points in power supplies, industrial machinery, and communication systems, while also providing input to analog-to-digital converters.

The TL431ACLPE3 is a three-terminal adjustable shunt voltage regulator in a SOT-23 package optimized for low power, low noise, and high precision applications. The device operates over a wide input range of 3 to 36V, and its output voltage is adjustable from 1.25 to 30V. It has a low operating current of 2.5mA, a very low quiescent current of 0.4µA, and a high temperature range of -40°C to +125°C. The device also features a low noise of 0.005% typical, a fast response time of 1µs, and a wide load range of 10µA to 10mA.

The TL431ACLPE3 features an adjustable output voltage that is determined by a small external voltage (VREF) applied to the ADJ pin, which is compared to a built-in reference voltage. When the voltage at the ADJ pin is greater than the reference voltage, the output voltage rises, and when the voltage at the ADJ pin is lower than the reference voltage, the output voltage decreases. The device has two hysteresis options, high and low, that can be used to adjust the required voltage stability. The device also has an output voltage limit that can be used to protect the load from greater than the desired output voltage.

In terms of applications, the TL431ACLPE3 is ideally suited for systems that require precise voltage regulation and current limiting, such as battery charging systems, power supplies, and system power management. Additionally, it can be used for overvoltage and overcurrent protection, and for adjusting the operating voltage in analog circuits. Because the device has a wide load range, it can also be used for active ORing of multiple power supplies and for supplying a high current from a low voltage.

Overall, the TL431ACLPE3 is an excellent choice for applications that require precise voltage regulation and current limiting. With its wide input range and low operating current, it offers significant advantages over traditional voltage references. It is widely used in industrial and communications systems as well as battery charging and overvoltage protection.

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