The circuit, integrated in a device, includes a generating stage generating a POR pulse and a bump detector detecting bump conditions on the common supply line and enabling the generating stage in the presence of a bump. A bump supply line is connected to a holding capacitor and to the common supply line via an isolation stage. The isolation stage connects the common supply line and the bump supply line in the absence of a bump, and isolates the bump supply line in the presence of a bump. The bump detector is connected to the common supply line and to the bump supply line to generate the POR pulse when the common supply line falls beyond a given level below the voltage of the bump supply line. The circuit is also used to generate a POR pulse in the presence of a low supply voltage and when the device is turned off, to ensure correct operation of the device.