The LM73100 is almost a magical component: it functions as an ‘ideal diode’ with just 30-40mOhm series resistance. At 5A it shows a bit of a positive temperature coefficient, so the loss is higher when it heats up, but still, it only has about 200mV drop at that load 😳

It gets warm, about 90C, but it’s still impressive for such a small surface mounted device.

I’ll be using it to charge batteries at max 3A, at which it remains stable at a much lower 50C 🙂

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