TS821BIZ

The TS821BIZ is a specialized linear voltage regulator from Texas Instruments that offers current regulation capabilities utilizing a revolutionary architecture known as an advanced voltage reference. It is particularly used in point-of-load applications due to its superior accuracy, low noise, high efficiency, fast transient response, and small size. This article will discuss the application fields and working principles of the TS821BIZ.

Applications

The superior performance of the TS821BIZ makes it a perfect fit for a variety of point-of-load applications in extreme environments. It has been used in notebook computers, netbooks, personal digital assistants, and even industrial applications such as inverters, power-over-Ethernet systems, and battery-operated medical and automotive systems. The integrated linear voltage regulator maintains a tight voltage regulation at the output, enabling very low power dissipation.

The TS821BIZ is also an optimal choice as a system power supply rail because it enables operation voltage regulation without the need for external components or separate power rails. This allows for simpler designs that provide improved system power efficiency and performance, with reduced board space.

Working principles

The TS821BIZ device works by regulating supply current demand flowing through the regulator within a certain range. It does this with an embedded precision reference that continuously adjusts the device’s output voltage. This is done by comparing the voltage drop across a low equivalent series resistance element (ESR) sensing resistor with the bias voltage provided to the device, and adjusting its output to maintain the desired reference voltage.

At the same time, the TS821BIZ can also respond to changes in load current. When a load step is applied, the device adjusts its output voltage in anticipation of the load current change. This response is necessary to maintain the desired voltage output and not let the voltage sag, resulting in power loss and reliability concerns.

Conclusion

The TS821BIZ is a revolutionary linear voltage regulator that utilizes an advanced voltage reference (AVR) architecture. This integrated solution offers superior accuracy and low noise, making it ideal for power-sensitive applications such as notebooks, netbooks, or industrial applications. The device works by regulating supply current demand, continuously adjusting its output voltage, and responding quickly to load current steps. It provides improved system efficiency and performance in extreme environments, and is the perfect choice for point-of-load designs.