Backside Power Delivery with a Direct 14:1/19:1 High-Ratio Point-of-Load Power Converter for Servers and Datacenters

For computing systems, a fully integrated backside power delivery with a direct 14:1/19:1-ratio power converter is presented featuring (1) backside laterally-diffused power MOS with 1.5x lower Q
ON
•R
ON
and 4.9x lower output C
OSS
compared to the stacked IO device, and (2) in-package optimized transformer with an innovative magnetic material (Bsat=0.77 T, co-ercivity=0.35 Oe, and resistivity>1e8 Ω•cm). With a 14:1 conversion ratio and 166x boost in power per volume (vs discrete), the total power delivery efficiency is η=72% at 1 W/mm
²
.