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TPS65994AD: PB_GATE_VSYS only 2.8V above VSYS and not 6V as stated in datasheet

Part Number: TPS65994AD

The PB_GATE_VSYS and PA_GATE_VSYS signals are only about 2.8V above VSYS. This is causing the N channel Mosfet to burn up. What would cause the PB_GATE_VSYS voltage to be so low, the only load on the signal is the gate of the Mosfet gate.