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 (f_CCM) was designed to be 70 MHz (measured at 50 MHz) with only two 6-nH inductors and one 15-nF capacitor.