TPS79928YZUR

The Texas Instruments TPS79928YZUR is a low-dropout (LDO) linear voltage regulator targeting low-noise applications. It provides a regulated output voltage of up to 2.5 volts and is capable of driving up to 3A of output current with very low noise and very low dropout voltage at full load. The device has a quiescent current of only 20µA, making it an excellent choice for battery-powered applications where operating time must be extended. The TPS79928YZUR is designed to minimize transient responses to load steps and line voltage variations, making it suitable for a wide range of applications.

The TPS79928YZUR is available in two packages, the 10-pin Power-Wafer-Scale-Package (WPWP) and the 8-pin Small-Outline Integrated-Circuit (SOIC). The WPWP features an exposed metal pad which can be used for improved heat dissipation and improved efficiency. The SOIC version has a larger pitch and a smaller body, making it more suitable for applications where board space is a premium.

The TPS79928YZUR is designed to be used in a wide range of applications, including medical imaging systems, datacom equipment, telecommunications infrastructure, lighting control systems, industrial systems, automotive electronics, and consumer electronics. Its ability to power devices even at low supply voltages, while providing a very low dropout voltage, makes it an ideal linear voltage regulator for these applications. It is also designed to provide a high level of transient protection, with a line-under voltage lockout threshold of 2.5V, a thermal shutdown circuit, and a wide operating temperature range.

The working principle of the TPS79928YZUR is based on the linear voltage regulator topology. This topology uses a series pass transistor to regulate the output voltage at a constant level by controlling the current through this transistor. The circuit is set up so that the voltage drop across the pass transistor is based on an error amplifier that senses the output voltage. When the output voltage is not at the desired voltage level, an error signal is generated and sent to the pass transistor, which then adjusts the current to differentially regulate the output voltage.

The TPS79928YZUR features an adjustable voltage range from 0.8V to 2.5V, with a maximum output current of 3A. It also has over-current and over-temperature protection, as well as a low-noise mode which reduces the output voltage noise by 50%. The device is capable of operation at temperatures up to 125°C.

In summary, the TPS79928YZUR is a versatile and reliable low-dropout linear voltage regulator designed for a wide range of low-noise applications. It is capable of driving up to 3A of output current and comes with a wide range of protection features. Its adjustable voltage range, low-dropout voltage, and low-noise mode make it an ideal choice for a range of applications.