The PT6884N from Texas Instruments is a non-isolated point-of-load (PoL) DC-DC converter module with 1 output at 9 V and 5 A, accepting an 18 V to 36 V input.
The PT6884A from Texas Instruments is a non-isolated point-of-load DC-DC converter module with 1 output at 9 V and 5 A, operating from an 18 to 36 V input.
The PT6884C from Texas Instruments is a non-isolated point-of-load (PoL) DC-DC converter module with 1 output at 9 V and 5 A, accepting an 18 V to 36 V input.