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[24] BUCK, CONTROL: Restart fails after reset with VBUS and VBAT connected

This anomaly applies to Engineering C, build codes QEAA-BA0, CAAA-BA0.

Symptoms

BUCKs fail to start, and the chip is unresponsive to TWI.

Conditions

VBAT and VBUS are present when reset occurs. Exiting ship and hibernation mode by attaching VBUS are both considered a reset.

Consequences

Outputs do not remain active.

Workaround

Connect LSIN2 and LSOUT2 to VSYS. Do not use load switch 2 for any other purpose.