ZHCSIV9F September 2009 – October 2018 TPS386000 , TPS386040
PRODUCTION DATA.
The SENSEm inputs are pins that allow any system voltages to be monitored. If the voltage at the SENSE1, SENSE2, SENSE3, or SENSE4L pins drops below VITN, then the corresponding reset outputs are asserted. If the voltage at the SENSE4H pin exceeds VITP, then RESET4 or RESET4 is asserted. The comparators have a built-in hysteresis to ensure smooth reset output assertions and deassertions. In noisy applications, it is good analog design practice to place a 1-nF to 10-nF bypass capacitor at the SENSEm input to reduce sensitivity to transients, layout parasitics, and interference between power rails monitored by this device. A typical connection of resistor dividers are shown in Figure 35. All the SENSEm pins can be used to monitor voltage rails down to 0.4 V. Threshold voltages can be calculated using Equation 1 to Equation 3.