The TPS5511 is designed to minimize the external components of personal-computer switching power supply systems. It provides protection circuits, power good indicator, fault protection output (FPO), and PSON control. OVP (over voltage protection) monitors 5 V, 3.3 V, and 12 V (12 V OV detects via VCC terminal). When an OV condition is detected, the PGO (power good output) is asserted low and FPO is latched high. PSON from low to high resets the protection latch. There is a 2.3-ms turn-off delay from PSON to FPO. There is no delay during turn on.