SLVSG89B April 2021 – January 2024 TPS3899-Q1
PRODUCTION DATA
A typical application for the TPS3899-Q1 is
voltage rail monitoring and power-up sequencing as shown in
Figure 8-2. The TPS3899-Q1 can be used to monitor any rail above 0.8V. In this design application,
two TPS3899-Q1 devices monitor two separate voltage rails and sequences the rails upon
power-up. The TPS3899DL01-Q1 is used to monitor the 3.3V main power rail and the
TPS3899PL16-Q1 is used to monitor the 1.8V rail provided by the LDO for other system
peripherals. The RESET output of the TPS3899DL01-Q1 is connected to the
enable (EN) input of the LDO with an external pull-up resistor RPULL-UP to the
3.3V power rail. The RESET output of the TPS3899PL16-Q1 is connected to
the (RESET) input of the microcontroller. A reset event is initiated on
either voltage supervisor when the VDD voltage is less than VIT- falling
threshold voltage. For a system reset event, a push-button input is placed at the SENSE pin
of the TPS3899DL01-Q1.