TPS71711DCKR

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Voltage regulators are electrical circuits used to provide a stable voltage level from a power source that may vary. The TPS71711 family of linear regulators from Texas Instruments is a low-dropout (LDO) linear regulator designed using advanced submicron process. The company designed the regulator to provide post-regulation for high-accuracy applications in consumer, communications, and industrial systems. In this article, we will focus on the TPS71711DCKR model in particular and discuss its application field and working principle.

TPS71711DCKR Background

The TPS71711DCKR model of the TPS71711 family is a low-dropout (LDO) linear voltage regulator that offers a variety of features. It operates in a differential input voltage range of 1.8 V to 5.5 V and provides a steady output current of up to 450 mA. It offers input current limiting, reverse current protection, and transient protection for the output. It also features a programmable soft-start feature, allowing for an adjustable output wait time from 0.1 ms to 8 ms.

The regulator offers excellent load and line transient performance with a 50 mV maximum step load transient deviation. Furthermore, it is available in a thermally enhanced 3-pin package with a low total power dissipation. This helps to boost the system\'s performance and reduce the thermal requirements of the component.

Application Field

With its wide operating temperature range of -40°C to 125°C, the TPS71711DCKR is suitable for a variety of applications in consumer, communications, and industrial systems. Due to its high accuracy and low dropout voltage, the device is suitable for post-regulation in various power applications such as mobile radio, multichannel transmitters, hot-swap and current-limited load applications, and more.

The device is also well-suited for applications that require high efficiency and low power consumption. Its low quiescent current of 35 μA helps to enhance the overall system performance by decreasing power consumption and increasing battery life. Additionally, it can also be used in automotive applications such as navigation systems, on-board cameras, audio systems, and more. The TPS71711DCKR is also compliant with automotive industry requirements and is certified to the AEC-Q100 specification.

Working Principle

The TPS71711DCKR uses a voltage feedback loop to maintain a constant output voltage even with changing output currents and supply voltage variations. It consists of an internal error amplifier, a series pass transistor, an accurate current source, and a precision comparator. The error amplifier is used to compare and control the output voltage with a reference voltage.

The series pass transistor is driven by the error amplifier in order to maintain the correct output voltage. The precision current source is used to limit the current through the series pass transistor and provide a constant output impedance for the whole device. The precision comparator is used to protect the device from unexpected overcurrent and overtemperature conditions.

The TPS71711DCKR features a number of features that help to optimize the power efficiency and reduce power losses. The device is equipped with input current limiting, reverse current protection, and transient protection for the output. The addition of programmable soft-start helps to reduce inrush currents and increase the system\'s reliability. The device also offers adjustable voltage accuracy and output impedance, making it suitable for a variety of applications.

Conclusion

The TPS71711DCKR from Texas Instruments is a highly reliable and accurate low-dropout (LDO) linear voltage regulator designed for use in a variety of applications in consumer, communications, and industrial systems. The device uses a voltage feedback loop to provide a stable output voltage in spite of changes in output current or supply voltage. It also offers a variety of features such as input current limiting, reverse current protection, and transient protection to help ensure reliable operation. Furthermore, it boasts a wide operating temperature range of -40°C to 125°C and is compliant with automotive industry requirements.

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