SLUSDO2C June 2020 – February 2021 UCC21540-Q1
When the DIS pin is set high, both outputs are shut down simultaneously. When the DIS pin is set low, the UCC21540-Q1 operates normally. Bypass using a ≈ 1-nF low ESR/ESL capacitor close to DIS pin when connecting to a micro-controller with distance. The DIS circuit logic structure is similar compared to INA or INB, and the propagation delay typical performance can be found in . The DIS pin is only functional (and necessary) when VCCI stays above the UVLO threshold. It is recommended to tie this pin to GND if the DIS pin is not used to achieve better noise immunity.