A 10W 3.8-5V Input IVR Chiplet with 93%-Peak-Efficiency and 3.2A/mm2 Density Featuring Wide Load Range and Adaptive Ganging for 2.5D/3D Vertical Power Delivery
Xichen Sun, Xuliang Wang, Renwei Chen, Xuchen Men, Junmin Jiang, Yan Wang, Xiaosen Liu · 2025
A monolithic Flying Capacitor Integrated Voltage Regulator (FCIVR) chiplet is proposed to supply wide load range while incorporating adaptive ganging capabilities for$2.5 \mathrm{D} / 3 \mathrm{D}{-}$ICs. It offers four ganging modes catering to scalable PDNs. The triple-loop regulation enables twodimensional V-F droop saving for drastic di/dt events and provides autonomous handshake driving for efficient conversion. By leveraging ML-driven circuit & RDL physical optimization, combined with ultra-thin interposer integration to minimize form factor and parasitics, the proposed VPD technology achieves 10 A max current,$3.2 ~\mathrm{A} / \text{mm}^{2}$density, 93 % peak efficiency and 32 ns FoM.