Patent ID: 7825429

Claim:
An electronic device comprising: a switching regulator comprising: at least one switch; a regulator including control functions configured to operate the at least one switch; an inductor coupled between the at least one switch and an output node; a feedback loop coupled between the output node and the regulator, wherein the regulator switches the at least one switch at a rate based at least in part on the feedback loop; a first ground coupled to the control functions; and a second ground coupled to the at least one switch; and a tunable voltage isolation ground to ground electrostatic discharge (ESD) clamp coupled between the first and second grounds, the clamp comprising: a dual-direction silicon controlled rectifier (SCR) coupled between the first and second grounds; and trigger elements coupled between the first and second grounds, the trigger elements configured to provide a trigger current to the dual-direction SCR when a desired voltage between the first and second grounds is reached.