The LMG3425R050's SOURCE pin is internally connected to GND pins of the power IC, the signal-ground reference. Local signal-ground planes must be connected to GND pins with low impedance star connection. In addition, the return path for the passives associated to the driver (for example, bypass capacitance) must be connected to the GND pins. In Layout Example, local signal-ground planes are located on second layer to act as the return path for the local circuitry. The local signal-ground planes are not connected to the high-current SOURCE pins except the star connection at GND pins.