When an output of the TPS2054B is disabled (ENx=L) what are the limitations on how that output pin may be driven by other devices? I want to provide power to a circuit in two ways: through the TPS2054B when a USB connection is present, otherwise, through a 7805 voltage regulator driving the same +5V rail when external DC power is available.
Is it safe to tie multiple outputs together, say two, in a situation where either one or both of them will be enabled?
The TPS2064 datasheet specifically lists reverse current blocking as a feature in the summary. This is not listed for the TPS2054B. Does it not have this feature?
Are there any brief descriptions of what is different between the TPS2054, TPS2054A, and TPS2054B parts?