The TPS7A13 uses two undervoltage lockout circuits: one on the BIAS pin and one on the IN pin to prevent the device from turning on before both V_BIAS and V_IN rise above their lockout voltages. The two UVLO signals are connected internally through an AND gate, as shown in Figure 7-1, that turns off the device when the voltage on either input is below their respective UVLO thresholds.

Figure 7-1 Global UVLO Circuit