A typical application for the TLV840-Q1 is voltage rail monitoring and power-up sequencing as shown in
Figure 9-1. The TLV840-Q1 can be used to monitor any rail above 0.9 V. In this design application, two
TLV840-Q1 devices monitor two separate voltage rails and sequences the rails upon power-up. The TLV840MAPL29-Q1 is used to monitor the 3.3-V main power rail and the TLV840MADL10-Q1 is used to monitor the 1.2-V rail provided by the LDO for other system peripherals. The RESET output of the TLV840MAPL29-Q1 is connected to the enable (EN) input of the LDO. A reset event is initiated on either voltage supervisor when the VDD voltage is less than V_IT-. For a system-wide reset event, both MR pins are tied to the SYS_RST. For the purpose of this application, the design detail on MR are not covered. For more information on the function of MR, please see Section 8.3.3

Figure 9-1 TLV840-Q1 Voltage Rail Monitor and Power-Up Sequencer Design Block Diagram