A Two-Phase Fully-Integrated DC-DC Converter With Self-Adaptive DCM Control and GIPD Passive Components

This paper presents a two-phase fully-integrated dc-dc converter for system-in-package systems with passive components fabricated using a glass-substrate-integrated passive device (GIPD) process. The proposed self-adaptive discontinuous conduction mode (DCM) controller and low-swing/full-swing buffer were incorporated to reduce the switching loss and maintain high efficiency at high switching frequency. A secondary phase and phase controller were added to increase the output power and reduce the output ripple. The proposed GIPD solution packages a standard complementary metal-oxide-semiconductor process and GIPD process in 3-D format to reduce the footprint of the system. The proposed self-adaptive DCM controller and low-swing/fullswing buffer improve efficiency of 15% in measurement compared to our previous work on the GIPD process in simulation. The peak efficiency of the proposed converter was 79.09% at a 400-mA load current, 5% higher than the peak efficiency presented in previous study. The maximal output power could reach 720 mW and the maximal switching frequency (fCCM) was designed to be 70 MHz (measured at 50MHz) with only two 6-nH inductors and one 15-nF capacitor.