Patent ID: 6903914

Claim:
A voltage transient compensation circuit for use with a DC-DC converter having a voltage output bus to which a load powered by said DC-DC converter is coupled, comprising: a first switch circuit coupled between a voltage input bus and said voltage output bus and being operative, in response to a voltage on said voltage output bus dropping below a first threshold, to couple said voltage input bus to said voltage output bus, and thereby transfer energy from said voltage input bus to said voltage output bus and said load; and a second switch circuit, coupled between said voltage output bus and a flyback circuit coupled to a reference voltage terminal and to said voltage input bus, and being operative, in response to a voltage on said voltage output bus exceeding a second threshold, higher than said first threshold, to couple said voltage output bus to said flyback circuit, so as to couple energy from said voltage output bus into said flyback circuit, and wherein, in response to said voltage on said voltage output bus dropping to less than said second threshold, said flyback circuit is operative to transfer energy stored therein to said voltage input bus.