SLOA343 August 2024 TPS543820 , TPS543A22 , TPSM843620 , TPSM843A22
2.4 Via Stitching
The via stitching technique consists of using via connections between outer ground layers. By creating these evenly spaced vias around the circuit, a ground loop connection shown in Figure 2-1 is avoided and you end up with Figure 2-2. This direct connection to ground further lowers the impedance and parasitic in the PCB.
Figure 2-1 Ground Loop
Connection
Figure 2-2 Avoided Ground Loop
Connection With Vias