The TPS7H1101A-SP has a current foldback feature which can be enabled when the CS terminal is greater than 0.9 · VREF (0.544 V). Pulling CS below this threshold disables the foldback current limit. If the foldback current limit is disabled, then the LDO will begin regulating again as soon as the current falls below the clamp threshold.
With foldback current limit enabled, when current limit trip point is activated,
Output voltage drops low, and
Output current folds back to approximately 50% of the current limit trip point.
This results in minimizing the power loss under fault conditions. Monitoring the voltage at the CS terminal indicates voltage proportional to the output current. It is important to note that the current sense voltage range on CS pin must be designed to stay above the 0.9 · VREF threshold to insure foldback is not inadvertently disabled at high currents.