In the data sheet, page 9, section 8.3.1, it says : "the internal resistive divider pulls down the output voltage smoothly". I need more info on the divider because I want to drive a 5V rail with two mutually exclusive sources, the TPS62153 and another. When one will be on, the other will be off. I need to know how much current will be drained by putting an external 5V on the output of the TPS62153, because it will come from a battery.
The second source is TPS61256, with a complete disconnect when disable, so this won't be a problem.