A 5.4V-Vin, 9.3A/mm2 10MHz Buck IVR Chiplet in 55nm BCD Featuring Self-Timed Bootstrap and Same-Cycle ZVS Control
Sally Safwat Amin, Harish K. Krishnamurthy, Huong T. Do, Claudio Alvarez, Mike Hill, Kaladhar Radhakrishnan, Vivek K. De, Sheldon Weng, Krishnan Ravichandran, Jim Tschanz, Wilfred Gomes, Jonathan Douglas · 2024
This paper presents a 5.4V-Vin, 0.6-1.8V Vout, 10MHz LDMOS-based buck IVR chiplet implemented in a 55nm BCD process featuring a self-timed bootstrap technique and same-cycle all-digital ZVS control to achieve 9.3A/mm2current density and 93.6% peak conversion efficiency, while meeting all reliability constraints. The IVR chip supports a maximum load current of 80A and occupies 8.6mm2die area.