TPS720/TPS720-Q1 Low-Dropout Linear Regulators Texas Instruments TPS720/TPS720-Q1 Low-Dropout Linear Regulators are dual rail, low-dropout linear regulators (LDOs). These devices offer outstanding AC performance (PSRR, load, and line transient response) while consuming a very low quiescent current. The VBIAS rail that powers the control circuit of the LDO draws a very low current. The VBIAS rail can be connected to any power supply equal to or greater than 1.4V above the output voltage. The main power path is through VIN, which can be a lower voltage than VBIAS, it can be as low as VOUT + VDO, increasing the solution's efficiency in many power-sensitive applications. For example, VIN can be an output of a high-efficiency DC-DC step-down regulator. The Texas Instruments TPS720-Q1 devices are AEC-Q100 qualified for automotive applications.