TPS726126DCQR

The Texas Instruments TPS726126DCQR is a positive output, linear voltage regulator that operates from a 2.7V to 5.5V input range, with an output voltage of 1.2V. It is designed for high performance and low noise, ideal for powering analog and digital circuits. The TPS726126DCQR is suitable for use in a variety of portable and stationary applications, including USB, automotive, and industrial control.

Application Field

The TPS726126DCQR is ideal for powering digital or analog circuits in portable and stationary applications, such as mobile phones, tablets, and industrial equipment. The device supports a variety of power supply configurations, including USB, automotive, and industrial. It has a wide input-voltage range (2.7V to 5.5V) and a low output voltage of 1.2V. The device is available in a voltage-adjustable version to accommodate varying system requirements.

The TPS726126DCQR is an ideal choice for several other applications. The low drop-out voltage enables extended battery life in handheld devices. The low quiescent current extends battery life further and reduces self-heating in portable electronics. The device is also ideal for AC-DC power supplies and voltage converters for microcontrollers and DSPs, where precise output voltage regulation is needed.

Working Principle

The TPS726126DCQR is a linear voltage regulator based on the common-emitter principle. The device input voltage is applied to the base of the transistor, and the regulated output voltage is taken from the collector. An internal feedback loop is used to control the output voltage, and a PNP transistor is used to provide the additional current needed when the output load increases. The internal PNP transistor has high gain and low saturation voltage, allowing the output voltage to stay very close to the target voltage at all times.

The TPS726126DCQR is a low noise regulator, delivering excellent regulation performance with a minimum of noise. This is achieved by using a two-stage architecture, where the output voltage is regulated by a combination of an amplifier and an error amplifier. The error amplifier senses the output voltage and adjusts the output current to ensure precise regulation. The device also features current limiting, thermal overload protection, short circuit protection and undervoltage protection.

Conclusion

The Texas Instruments TPS726126DCQR is a positive output, linear voltage regulator designed for high performance and low noise, ideal for powering analog and digital circuits in a variety of applications, including USB, automotive, and industrial control. The device has a wide input-voltage range of 2.7V to 5.5V, a low output voltage of 1.2V, and features current limiting, thermal overload protection, short circuit protection and undervoltage protection.