Patent ID: 7893677

Claim:
A circuit comprising: a boost voltage regulator including a low-side switch and a high-side switch, the boost voltage regulator operable to generate a stabilized output voltage that is greater than an input voltage; and an active current modulator electrically coupled to detect a negative current flowing through said high-side switch during a light load condition, wherein when said negative current flow is detected, said active current modulator is activated to maintain said high-side switch in an on state in a linear mode and to limit said negative current flow to a predetermined current level, wherein said active current modulator further comprises; a comparator circuit electrically coupled to said high-side switch, operable to detect said negative current; and a current mirror circuit, electrically coupled to said comparator circuit and to said boost voltage regulator circuit, operable to force said negative current to be in a predetermined relation to said predetermined current level.