SBVS395 July 2022 TPS7A57
PRODUCTION DATA
Generally speaking, the dropout voltage often refers to the minimum voltage difference between the input and output voltage (VDO = VIN – VOUT) that is required for regulation. When VIN drops to or below the set VDO for the given load current, the device functions as a resistive switch and does not regulate output voltage. When the device is operating in dropout, the output voltage tracks the input voltage and the dropout voltage (VDO) is proportional to the output current because the device is operating as a resistive switch. Operating the device at or near dropout significantly degrades the device transient performance and PSRR. Maintaining sufficient VOpHr significantly improves the device transient performance and PSRR.