The TPS732 internal current limit helps protect the regulator during fault conditions. Foldback current limit helps to protect the regulator from damage during output short-circuit conditions by reducing current limit when V_OUT drops below 0.5V. See Figure 5-17 in the Typical Characteristics section for a graph of I_OUT vs V_OUT.

From Figure 5-17 approximately –0.2V of V_OUT results in a current limit of 0mA. Therefore, if OUT is forced below –0.2V before EN goes high, the device potentially does not start up. In applications that work with both a positive and negative voltage supply, enable the TPS732 first.