TPS71719DCKTG4

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TPS71719DCKTG4 Application Field and Working Principle

The TPS71719DCKTG4 from Texas Instruments (TI) is a 2.2 mA, n-Channel low-dropout linear regulator (LDO) designed for regulating low to medium current sources. It is specially designed for space-constrained applications where high current drive and ultra-low dropout are required.

The TPS71719DCKTG4 application field includes energy harvesting and solar panel systems, automotive electronics, automation systems, white goods, and industrial control and measurement devices.

The working principle of the TPS71719DCKTG4, as with all linear voltage regulators, is to start with a higher input voltage than the output, and use a series of transistors and resistors, known as a pass transistor, to adjust the output voltage according to the load.

The pass transistor allows for adjustable current through the circuit to be provided in order to obtain the desired output voltage. The TPS71719-DCKTG4 uses a n-channel pass transistor with an on-resistance rating of 0.2 Ohm.

In order to regulate the output voltage, the pass transistor is controlled by a differential amplifier, which monitors the output voltage and compares it to the reference voltage. When the output voltage is greater than the reference voltage, the differential amplifier sends a signal to decrease the on-resistance of the pass transistor, in order to reduce the flow of current. Conversely, when the output voltage is lower than the reference voltage, the differential amplifier sends a signal to increase the on-resistance of the pass transistor, in order to increase the flow of current.

This allows the TPS71719DCKTG4 to regulate the output voltage to within ±10 mV over its temperature range. The output voltage can be set using two external resistors, which allows it to be easily adjusted to meet the application\'s requirements.

The TPS71719-DCKTG4 also has a low dropout voltage, which means that the regulated output voltage is maintained even when the input voltage is very close to the output voltage. This makes the TPS71719DCKTG4 ideal for applications that require a very low dropout, such as energy harvesting and solar panel systems.

The TPS71719-DCKTG4 also has a low current draw, which is ideal for applications where power management is essential. It also has a low temperature coefficient and a low noise operation which make it suitable for automotive and industrial control applications.

In addition to its features, the TPS71719DCKTG4 is also equipped with built-in protection features, such as over-temperature protection and current limit protection, which ensure safe and reliable operation.

Overall, the TPS71719DCKTG4 is an ideal solution for applications where high current drive and ultra-low dropout are required. It is well-suited for automotive electronics, energy harvesting and solar panel systems, industrial control and measurement devices, and automation systems.

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