The GND pad is used to dissipate heat for
the TPS25752A device.
Connect the GND pins (11, 12, 14 and 31) to the
Ground pad (39) underneath the TPS25752A device. Connect the through hole
vias from the ground pad on the top layer to a
copper pour on the bottom layer to help dissipate
heat. Additional vias can be added to improve
thermal dissipation.