A typical application for the TPS389006 is shown in Figure 8-1. TPS389006 is used to provide the proper voltage monitoring for the target SOC device. A multichannel voltage monitor TPS389006 is used to monitor the voltage rails as these rails power up and power down to make sure that the correct sequence occurs in both occasions. A safety microcontroller is also used to provide ACT, SLEEP, and I²C commands to the TPS389006 monitor the NIRQ pin for active faults. The ACT signal from the safety microcontroller determines when the TPS389006 enters into ACTIVE or IDLE states while the NIRQ pin of the TPS389006 acts as a latched interrupt pin that is set when a fault has occurred. The host microcontroller can clear the fault by writing 1 to the affected registers. The power rails for the safety microcontroller are not shown in Figure 8-1 for simplicity.

Figure 8-1 TPS389006 Voltage Monitor Design Block Diagram