SPRS288H May 2008 – October 2021
These devices are immune to quick voltage transient or excursion on VDD. Sensitivity to transients depends on both pulse duration (tGI_VIT) found in Section 6.6 and transient overdrive. Overdrive is defined by how much VDD exceeds the specified threshold. Threshold overdrive is calculated as a percent of the threshold in question, as shown in Equation 1.
TPS3813-Q1 devices have built-in glitch immunity (tGI_VIT-) as shown in Section 6.6. Figure 7-1 shows that VDD must fall below VIT for tGI_VIT, otherwise the faling transistion is ignored. When VDD falls below VIT for tGI_VIT, RESET transitions low to indicate a fault condition after the propagation delay high-to-low (tPHL). When VDD rises above VIT+ = VIT + VHYS, RESET deasserts to a logic high indicating there is no more fault condition only if VDD remains above VIT+ for longer than the reset delay (tD).