This article presents a dual-inductor ladder (DIL) hybrid buck converter to support system-on-chip (SoC)-compatible subvolt ( $\le$ 1 V) supply rails directly from a single-cell Li-ion battery (2.5–5 V). Facilitating an extreme downconversion (16.67 $\times$ ) using scaled CMOS technology, the proposed topology presents a unique solution to address the active versus passive component utilization while still neutralizing the well-known efficiency versus power density (PD) trade-off for a hybrid converter. The balanced inductor currents help reduce the average switch currents, improving active switch utilization, while the natural soft-charging of the flying capacitors reduces the switch rms currents, improving passive component utilization and PD. The DIL, thus, presents an optimal two-inductor solution for similar applications achieving excellent efficiency and PD. Fabricated in a 65 nm bulk CMOS technology, the DIL obtains 90.6% peak efficiency, 0.93 W/mm2 peak active PD (PPD) with a maximum power delivery of 1.35 W occupying just 1.13 mm2 die area.