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Technical Lecture

Point-of-Load (POL) and Multi-Phase Converters

T32.4 - A 96.1% Peak Efficiency, 6.8 kW/in³, 48V-to-6V On-Package Intermediate Bus Converter with LV-GaN Power Transistors

Thursday, March 20, 2025
9:00 AM – 9:20 AM ET
Location: Level Three, A314
This paper presents the industry’s first and only 48V, on-package, intermediate bus converter (IBC) solution with an 8:1 fixed ratio using low-voltage (LV) GaN power transistors with 10x superior figure of merit over Si laterally diffused MOS (LDMOS) for high performance computing applications. Eleven 2x2 mm GaN half-bridge dies along with the passives are co-packaged to form an 8:1 switched capacitor divider. This 1-MHz 200-W IBC prototype achieves a peak efficiency of 96.1% and a power density of 6.8 kW/in3.