A Buck-or-Boost Converter Module With Embedded Inductor and Fast Current Limit

The operation and performance of a four-switch buck-or-boost converter are presented with peak efficiencies greater than 90% under various loads. The converter is demonstrated in a module format where the single inductor is embedded within the laminated module substrate. Nominal inductance is 2 μH and dc resistance is 120 mΩ. The converter provides a fast-acting current limit function when the sensed inductor current exceeds about 1 A.

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