SNVSBA1B April 2019 – April 2020 TPS3840-Q1
PRODUCTION DATA.
A typical application for the TPS3840-Q1 is voltage rail monitoring and power-up sequencing as shown in Figure 48. The TPS3840-Q1 can be used to monitor any rail above 1.6 V. In this design application, two TPS3840-Q1 devices monitor two separate voltage rails and sequences the rails upon power-up. The TPS3840PL30-Q1 is used to monitor the 3.3-V main power rail and the TPS3840DL16-Q1 is used to monitor the 1.8-V rail provided by the LDO for other system peripherals. The RESET output of the TPS3840PL30-Q1 is connected to the ENABLE input of the LDO. A reset event is initiated on either voltage supervisor when the VDD voltage is less than VIT- or when MR is driven low by an external source.