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A synchronous rectifier in a 2 pin package
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oPossum:
Yet another part that I didn't know existed. A MOSFET and control circuitry in a 2 pin package that looks like an ordinary diode.
Info begins at 6:20
BravoV:
Its been for years, TI has it, called SM74611.
Twoflower:
The TI device has a different mode of operation and is not suitable for an SMPS as it is designed as bypass diode. Still the idea to use a voltage pump to every now and then charge an internal cap is nice.
But yes, the basic idea to use a MOSFET as switch is similar.
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