Dear all.
Our customer has caused trouble.
When LM5118 is Buck/Boost mode and the voltage of input and output is near voltage and hangs a load, a BOOST circuit doesn't function.
This is in the state like Figure 9 between 15V and 16V.
Even if input/output is changed to BUCK mode state, BOOST doesn't work.
ex. output setting=10V ->8V (because BOOST does't work)
The FB voltage is also 1.18V at the same time.
Their circuit is as following;