TC1221ECHTR Integrated Circuits (ICs)

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The TC1221ECHTR is a DC DC switching regulator IC from Texas Instruments. It is a linear voltage regulator with inbuilt protection circuitry, optimized for applications requiring high output current stability as well as a high level of stability for its input voltage. This makes it ideal for applications such as ATX power supplies, computer desktop controllers, telecommunications, industrial controls, and many more.

This IC requires an input voltage from 4.5V to 28V, and delivers a regulated output current up to 1.25A. It supports a wide range of output voltage settings, from 0.8 to 5.0V, and provides high efficiency with a minimal effect on input voltage. It also provides a wide output current range of 0.2 to 1.0A, without any loss in regulation.

The TC1221ECHTR offers a number of features that make it ideal for applications requiring a high level of current stability and output voltage stability. It has a wide dynamic range and a low dropout voltage of 0.2V, allowing it to maintain the same output voltage even when the input voltage is slightly changed. It also features an adjustable current limit protection on both positive and negative output rails, with an over current limit of 1A. It is able to perform a shutdown for thermal protection, and has an adjustable over voltage protection. Additionally, it features a Power-Good indicator, allowing the user to monitor the state of the output current.

Another great feature of this IC is its low power dissipation, which makes it suitable for applications requiring high efficiency and minimal power consumption. The TC1221ECHTR has a low quiescent current to output current ratio of 0.05% over the full load range, reducing the need for frequent voltage adjustments.

Moreover, it offers excellent protection against line transients, as well as a high noise immunity of 100mV referred to the output rail. It can tolerate an input ripple up to 30%, has an EMI filter, and also provides a low output voltage ripple of less than 2%. This makes it a great choice for applications requiring high reliability.

The TC1221ECHTR is designed to ensure that the output current remains constant and the output voltage is stable. It also provides a low output voltage ripple and excellent line transient protection. These features make it a great choice for applications that require a high level of current stability and output voltage stability, such as ATX power supplies and computer desktop controllers.

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