Power converter employing a micromagnetic device

A power converter, comprising:

• a power train, including:
• a switch configured to conduct for a duty cycle and provide a regulated output characteristic at an output of said power converter, and
• a micromagnetic device, interposed between said switch and said output of said power converter, including:
• a substrate,
• a magnetic core layer formed over said substrate from a magnetic alloy,
• an insulating layer formed over said magnetic core layer, and
• another magnetic core layer formed over said insulating layer from a magnetic alloy, wherein at least one of said magnetic alloys include iron, cobalt, phosphorous, and vanadium or tungsten, and a content of said vanadium or tungsten is at least one part per million, a content of said cobalt is in a range of 1.8 to 4.5 atomic percent, a content of said phosphorus is in a range of 20.1 to 30 atomic percent, and a content of said iron is substantially a remaining proportion of said at least one of said magnetic alloys,
• a controller configured to provide a signal to control said duty cycle of said switch;
• and
• a driver configured to provide a drive signal to said switch as a function of said signal from said controller.