Olivier Maher, N. Harnack, et al.
DRC 2023
This work presents a 48V/1V DC-DC Point-of-Load (POL) converter for efficient high voltage conversion in data centers. The converter includes (1) a three-level hybrid Dickson topology with GaN/Si hybrid conversion achieving efficient flying capacitor (CF) utilization. (2) A gradient descent run-time optimizer finding optimal switching frequency (fSW) and number of fingers turned on (NF) during converter's operation. (3) A 10bit hybrid ADC for current sensing. The test chip is fabricated in 0.18m BCD process and shows a 90.4% peak efficiency at 48V-1V conversion with a 240 A/inch3 current density.
Olivier Maher, N. Harnack, et al.
DRC 2023
Sae Kyu Lee, Ankur Agrawal, et al.
IEEE JSSC
Todd Takken, Andrew Ferencz, et al.
VLSI Circuits 2019
Tommaso Stecconi, Roberto Guido, et al.
Advanced Electronic Materials