How to connect two ADP5071 regulators in parallel?

1.6A is a big load. ADP5071 may not be a good choice for it. If the output requirement is 5V, 1.6A, what is the input voltage?

1.6A is a big load. ADP5071 may not be a good choice for it. If the output requirement is 5V, 1.6A, what is the input voltage?

Hi,

Yes, 1.6A is too high for a single ADP5071. In my board I have 2 ADP5071 circuits. For both the devices input (12V) and output (5V) voltages are same. But one device has 1.4A load and other has 0.2A load. 1.4A loaded ADP5071 is getting shutdown because of high current. To avoid this problem, I thought to do parallel of both the devices but I don't know that ADP5071 has this capability (doing parallel) or not.

This is required to do R&D on my remaining section of board. In next version we are replacing the ADP5071.

Please suggest ASAP. 

Thanks & Regards,

Lakshmaiah S.

From what I see I think you just need a step-down converter: 12V to 5V, 1.6A. There are several parts but you may want to start looking at ADP2302 or LT8609.

Hi,

I understood your point. As I mentioned you in before reply, we are replacing ADP5071 in next version. But current version board is already populated and current populated version has 2 ADP5071 regulators, one has 1.4A load and other has 0.2A load. we understood from the ADP5071 design tool, we can load ADP5071 up to 1A on each. If, ADP5071 has capability of sharing current in parallel connection, the maximum current load will become 2A (because of 2 devices are connected in parallel and has 1A load capability on each) and my current populated version need 1.6A load. So, we will be in safe side.

Please let me know, ADP5071 has this (sharing current in parallel connection) capability or not? 

Thanks & Regards,

Lakshmaiah S.

Hi Lakshmaiah S.,

I don't think parallel operation is possible. I have not done it too. ADP5071 individually will have its own error amp which has input offset. This means there will be delta between the two outputs. Matching of the two outputs and current sharing will be an issue.