TPS71721DCKR

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TPS71721DCKR Application Field & Working Principle

TPS71721DCKR is a low-dropout voltage regulator that belongs to the family of linear voltage regulators. It has been designed by Texas Instruments and it finds a wide range of applications in automotive, industrial, and communications systems. As such, this voltage regulator is suitable for use in advanced, high-performance systems where board area, cost, and power supply noise are critical factors. In this article, we will look at the application fields and working principle of the TPS71721DCKR voltage regulator.

Application Field

The TPS71721DCKR voltage regulator is suitable for use in automotive, industrial, and communications systems, making it an ideal power supply solution for high-speed, high-performance processors as well as FPGAs and DSPs. It also can be used in entry-level automotive systems, military and avionic applications, and general industrial control applications such as motor control, factory automation, and other control systems.

The device provides a full set of features including current limiting, thermal shutdown, and overtemperature protection (OTP). This voltage regulator is capable of providing up to 350mA of output current and delivers low dropout of 100mV at ≥ 150mA load. This low-dropout voltage regulator also has exceptionally low output noise, making it ideal for use in noise-sensitive applications. Furthermore, it meets the automotive requirements of Underwriters Laboratory (UL) 1577, and its versatility makes it a suitable device for applications with varying input and output voltage levels.

Working Principle

The TPS71721DCKR voltage regulator works on an adjustable, single-ended design in which a resistor divider is used to set the output voltage. It uses an internal error amplifier, which senses the difference between the actual output voltage and the reference voltage and feeds the difference back to the control loop. This feedback signal is then applied to the error amplifier output, which in turn adjusts the output voltage by controlling a P-channel MOSFET.

In addition to the traditional linear regulator design, the TPS71721DCKR voltage regulator also offers some additional features, including short-circuit protection. If a short-circuit occurs, the voltage regulator shuts down to prevent further damage. It also features a wide input voltage range from 6V to 40V and an adjustable output voltage range from 0.9V to 40V. The total quiescent current of the device is typically less than 10µA, and its low dropout voltage (100mV at ≥ n150mA load) allows it to be used in high-efficiency designs.

Overall, the TPS71721DCKR voltage regulator is an ideal power supply solution for automotive, industrial, and communications systems due to its high performance and versatility. Its full set of features, including current limiting, thermal shutdown, and OTP, make it an excellent choice for advanced, high-performance systems.

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