Hi, 

Please refer Table 8-3. Recommended Isolation Transformers Optimized for SN6501 in SN6501 datasheet to choose the recommended transformers.

I don't think you need 2.426 turn ration for a 5V-5V solution (you need to choose all the parameters based on your real use cases, rather than the datasheet abs value). 

If you LDO is very hot, you may want to measure the input voltage, output voltage, output current to check if the voltage and current are what you expect. 

Best Regards,

Ryan Tan

You are right. TIDA-010030 uses 760390012. 

You will find that the main difference is turn ratio. So if your LDO and diodes have very low drop voltage or your load can withstand the drop, it is fine to choose a different turn ratio here. And of course, you can choose 760390014. 

Please check if the new transformer will damage your LDO. Again, if you have the waveform for LDO input and output, that will make it easier to analysis.