在降压器中的基本要求是降低输入电压。虽然线性稳压器可以满足这一需求，但并不能实现高效。基于“BUCK”的开关整流器现在已经出现并应用了一段时间，便利，易于应用的器件使实际电路更易实现。文中对降压开关整流器的实现作了阐述。 Application Note 35 August 1989 Step-Down Switching Regulators Jim Williams A substantial percentage of regulator requirements lost in this voltage-to-current-to-magnetic eld-to-cur- involve stepping down the primary voltage. Although rent-to-charge-to-voltage conversion. In practice, the linear regulators can do this, they cannot achieve the circuit elements have losses, but step-down efciency is efciency of switching based approaches1. The theory still higher than with inherently dissipative (e.g., voltage supporting step-down (“buck”) switching reg……