IC20 and IC34 : TPS7A4901 Layout guidelines are not respected
The GNDpin must be tied directly to the PowerpAd under the device All capacitors must be placed on the same side of the PCB as the regulator. TI recommends that the board be designed with separate ground planes for VIN and VOUT, with each ground planestar-connected only at the GNDpin of the device.In addition,the ground connection for the bypass capacitor must connect directly to the GNDpin of the device. Vias on the pad need to be Capped and Filled. Data sheet gives and example of layout.