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TPS54239: IC has 8mA of unexplained current draw

Part Number: TPS54239


We're using a TPS54239 to generate 3.3V from an 8V source. Measuring each pin, I get the following:

EN: 8V

VFB: 0.75V

VOUT: 3.3V


VREG: 5.5V

SS: 5.5V

There is no load since I've disconnected the VOUT from this circuit to the load. In total, I see 8mA coming from VIN to drive this circuit. According to my reading of the datasheet, this part should draw maybe 1mA without any load, but nowhere near 8mA. VREG is also unloaded; I've confirmed by measuring to GND, which reads 0.5 megaohms. Measuring from VOUT to GND reads 40K.

Is this part expected to draw ~8mA when the output is not loaded?