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LM5060: Power switch for boost disconnection FET

Part Number: LM5060
Other Parts Discussed in Thread: LM5121, LM5122, LM74502-Q1, , LM74502

Hi Team,

My customer is considering two concepts with a boost for 18~30VIN to 32~53VOUT (500W). 

1. LM5121 (disconnection switch control is integrated)

2. LM5122 (disconnection FET should be added)

A disconnection FET is required to prevent VOUT from following VIN level during boost disable condition. Can you suggest the best simple power switch  for this purpose?

Thanks a lot!