SLUSFS4A September 2025 – September 2025 UCC27734-Q1 , UCC27735-Q1
PRODUCTION DATA
On versions of the device with separate grounds, a dedicated capacitor for CVDD–COM and CVDD–VSS is recommended. A similar approach to calculating CBOOT may be used to calculate CVDD–COM. Using the same example as CBOOT gives the same value for the CVDD–COM capacitor.
The VDD capacitor (CVDD) should be chosen to be at least 10 times larger than CBOOT. For this design example a 2μF capacitor was selected.