Shared output on MP4255

DC-DC Power Converters
1

Hello - I’m looking to use the MP4255 at 6A (rather than 2x 3A) as mentioned in the datasheet. There’s nothing about how to actually achieve this. Do I just link the SW switch outputs and the FB pins and use a single, higher rated inductor?
Or do I have separate inductors and FB for each buck and then join the outputs together? Or is it more complicated to ensure current sharing between the bucks?

Also - side question - there’s nothing in the datasheet about how to use the ISENS pin and the circuits just show it connected to GND. Is there anything we can do with this pin?

2

Hi Tom,
I am looking into this for you and will keep you posted with feedback.

Best,
Nouman

3

Tom,
We recommend MP4247 for high current 6A application, the shared means it can supply 3 amps simultaneously via 2 ports.

Not 6 amps single output.

Best,
Nouman