TL431IPKG3

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TL431IPKG3 is a voltage reference integrated circuit (IP) manufactured by Texas Instruments, which is primarily used as a low-dropout voltage regulator in several electronic systems. The TL431 is a three-terminal device primarily used to monitor and set the output voltage level of a power supply. It can be used to set the output voltage of a linear regulator to a precise level, or for over-voltage protection in switching regulators. The TL431 can also be used as a precision current source.

The TL431 is a three-pin device, consisting of a bandgap voltage reference, an error amplifier and a precision current source. The device operates from a single supply ranging from 4.5V to 36V, consuming less than 50μA of current. It has an output voltage of 2.4 to 36V with a maximum tolerance of ±2.5%. It also has a maximum load current of 500mA, an output impedance of 0.1Ω and a temperature coefficient of 50ppm/°C.

The device utilizes a bandgap voltage reference with an output voltage of 2.5V. This output voltage is fed to an error amplifier, which compares the 2.5V with an external voltage reference. The error amplifier then adjusts the output voltage of the device to match the reference voltage. The external voltage reference is usually set at the desired output voltage of the power supply by the user.

The TL431IPKG3 also includes a precision current source, which is used to set the output current of the power supply. This current source is used to drive the gate of the pass transistor, ensuring that the maximum load current is not exceeded. The TL431IPKG3 has a wide output voltage range of 2.4V to 36V and is able to withstand up to 500mA of load current. Its low dropout voltage makes it ideal for use in low-voltage applications.

The TL431IPKG3 is suitable for use in applications such as voltage regulation, over-voltage protection and current source. It is widely used in various embedded systems and audio amplifiers, given its low power requirements and precise voltage reference. It can also be used in industrial systems, where high precise voltage and current levels are required. The device is available in a small SOT-89 package, which makes it suitable for portable applications.

In conclusion, the TL431IPKG3 is a widely used three-terminal device for voltage regulation, over-voltage protection and current source. It has a wide input voltage and output voltage range, low dropout voltage and low power consumption, making it suitable for a variety of applications. Its small SOT-89 package makes it easy to use in portable devices.

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