DC-DC switching converters come in synchronous and non-synchronous varieties. What are the advantages of the synchronous regulators? Are there different advantages for a synchronous buck versus boost regulator? Am I likely to need the same number of external components for either topology? Will they produce the same amount of EMI or ripple?
Electrical – What are the advantages of a synchronous switching regulator
switching-regulator
Best Answer
Every voltage drop in a regulator is a source of inefficiency. Synchronous regulators replace the normal schottky diode with a MOSFET that is open when the primary MOSFET is closed and vice versa to reduce or eliminate even the small inefficiency caused by the diode. This is true in both buck and boost regulators.