Q
How can I disable one channel when I don’t’ use it?
A
If you don’t use one channel, for example dummy Channel 4, pull PVIN4, EN4,
COMP4 and FB4 pin to ground, and leave SW4 and BST4 pin floating.
ADP5052
Recommended for New Designs
The ADP5052 combines four high performance buck regulators and one 200 mA low dropout (LDO) regulator in a 48-lead LFCSP package that meets demanding performance...
Datasheet
ADP5052 on Analog.com