TPS73230DBVTG4

TPS73230DBVTG4 Application Field and Working Principle

The TPS73230DBVTG4, developed by TI, is a low noise and high PSRR linear fixed-output low dropout (LDO) voltage regulator for 5V and 3.3V applications. It is a fixed precision, ultra-low-noise ULP (ultra low power) voltage regulator which features high accuracy and high PSRR, ultra-low-noise operation, and extremely low quiescent current.

The TPS73230DBVTG4 is designed to meet the stringent criteria for today\'s miniature and low-power systems. It is used in applications such as desktop and laptop PCs, network routers and switches, wifi and Bluetooth, automations and control systems, cellular phones, application processors and graphics processors, medical electronics, and other sensitive circuits.

The TPS73230DBVTG4 operates over an output range of 3V to 6V, and delivers up to 500mA with an output accuracy of ±1%. It requires no external components, and has a low dropout voltage of 200mV. It also operates at an input voltage range of 2.5V to 5.5V and has a very low quiescent current of 2μA.

The TPS73230DBVTG4 uses three separate stages to regulate the output voltage. The first stage is the error amplifier; this is used to compare the reference voltage to the output voltage. When the output voltage is lower than the reference voltage, the error amplifier will increase the voltage at the input. The second stage is the pass transistor, which is used to convert the higher voltage at the input to the required output voltage. The third stage is the output voltage regulator, which is used to regulate the output voltage by varying the current through the pass transistor.

In order to provide a precise output voltage, the TPS73230DBVTG4 incorporates high-accuracy voltage references, low-noise voltage regulators, and a high-performance error amplifier circuit. It also features thermal shutdown protection and short-circuit protection to provide a high degree of safety and reliability. Additionally, the TPS73230DBVTG4 is designed to have a maximum output ripple of 150mV.

In conclusion, the TPS73230DBVTG4 is an excellent choice for low-noise and high-PSRR voltage regulation in portable, low-power applications such as laptop PCs, cell phones and medical electronics. It offers a high degree of accuracy and reliability, low dropout voltage, and a very low quiescent current. It also requires no external components.