TPS79601DRBT

TPS79601DRBT Application Field and Working Principle

The TPS79601DRBT is a low quiescent current low dropout linear voltage regulator (LDO) series made by Texas Instruments. It belongs to the PMIC - Voltage Regulators - Linear category and has various applications in any systems that need a reliable power supply.

This LDO regulator provides an adjustable output voltage with a low output voltage noise. It has an adjustable current limit of 1A and a dropout voltage of 350mV that ensures an efficient operation when supplying as low as 1mA load currents. Additionally, the TPS79601DRBT features ultra-low standby current consumption of 2.9µA and logic-controlled enable/disable control. This makes it great for applications with tight power budget requirements.

The TPS79601DRBT has an integrated circuit construction, which allows it to be used in low output voltage applications like 0.6V up to 1.2V. Other features include a soft start function, over temperature protection, under voltage lockout, over temperature protection, and a power-saving operating mode.

What is the Working Principle?

The working principle of a linear voltage regulator is to maintain an output voltage that is close to what is expected from the data sheet when an input voltage is applied to the input of the regulator. The TPS79601DRBT operates with a feedback loop consisting of a resistor and a reference voltage. The voltage reference voltage is a reference voltage source of nominally 600mV. The resistor controls the output voltage; when the input voltage on the reference voltage line rises, the output voltage of the regulator increases accordingly. When the input voltage is the same as the reference voltage, the output remains at the desired voltage.

The core of the regulator is the error amplifier. The error amplifier compares the input voltage and the set output voltage, and adjusts the output voltage accordingly to keep the two voltages equal. To do this, the amplifier measures the voltage difference between the reference voltage and the input voltage and then adjusts the output voltage to reduce the error. The regulator also has an internal compensation network for better stability and accuracy.

Applications

The TPS79601DRBT offers very small form factor so it can suitably fit into tight space requirements in a variety of systems. It is particularly suitable for portable and battery-powered electronics due to its low operating current and low dropout voltage. It can also be used in automotive applications since its low noise characteristics make it suitable for audio power control applications. Additionally, it has been designed to offer great electrical noise immunity and is well-suited for systems in rough industrial and automotive environments.

The TPS79601DRBT can also be used in notebook and desktop PCs, where its low power consumption makes it ideal for better energy efficiency. It is also well-suited for use in telecommunications systems, medical equipment, and consumer electronics devices such as cameras and digital camcorders. Lastly, the TPS79601DRBT can be used in solar panel systems, as well as in LED lighting applications.