A monolithic gallium nitride‐based two‐phase synchronous buck converter with high operating frequency

The need for a high-frequency and high-efficiency gallium nitride (GaN)-based buck converter that can be controlled directly by low swing pulse width-modulated (PWM) signal, without the additional buffers or preamplifiers, poses significant challenge in field of power conversion dynamically supply applications. To solve this problem, letter presents monolithic two-phase synchronous converter, fabricated using 0.25-um GaN-on-Si process, integrated both drivers stage transistors, requiring preamplifiers. So, proposed PWM signal with only 1 V (−0.5 to 0.5 V). At 100-MHz switching frequency, achieves maximum output 12 W efficiency 82%. includes two identical half-bridge Monolithic Microwave Integrated Circuit (MMICs), frequency multiplication property multi-phase topology, equivalent reach 200 MHz open-loop operating mode. experimental results show track 40-MHz bandwidth envelope (256 QAM, 6 dB PAPR) 80.1% efficiency.