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LM5576: Replacement for UAV application

Part Number: LM5576
Other Parts Discussed in Thread: LM5013-Q1, LM70840-Q1

Tool/software:

Hello we are looking for a replacement for the LM5576 IC which we have used for a while and seen being used in many UAV power modules to step down till 14S lithium battery to 5.3V @ 3A, we aim to have a part with synchronous rectification and/or reduced pin count and smaller passives (the customer does not want electrolytic caps on the converter output)

Our requirements:

Input Voltage 60.9V max (14S LiHV) 
Output  5.3V, 2/2.5A continuous; 3A max
Use Case Agricultural UAVs

We are open to use a buck controller and have an external switch setup if needed, the driving factors for any solution being being less heat dissipation and small solution size. We have explored the LM5013-Q1 but it seems to be out of stock. 

Thank you!