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Combining USB power via TCPP03 and external power source

tobiase
Associate

I'm trying to combine an external +24V power source and the 5V USB power source into a single step-down converter to generate 3.3V.

The USB power is managed by the TCPP03 chip for both providing and sourcing power. On my 24V line I have an eFuse TPS26400 which can be simplified as an ideal diode.

Is there a way to combine both voltages (behind TCPP03 and behind eFuse) ideally without diodes (OR'inged diodes are too inefficient)?

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