Design of a High-frequency Monolithic GaN DC-DC Buck Converter
This study presents the design and implementation of a high-frequency monolithic GaN DC-DC buck converter,fabricated using a 0.25 μm D-mode GaN-on-Si process.The chip integrates both the driver and the half-bridge power stage.The level-amplifying function in the driver is achieved through an active pull-up structure.Within the frequency range of 100-200 MHz,the proposed monolithic GaN DC-DC buck converter can be directly controlled by high-speed pulse signals with a voltage swing as low as 0.7 V,without requiring external off-chip modules.It achieves a peak power-stage efficiency,overall efficiency,and output power of 92.2％,84.24％and 7.7 W respectively.Compared with previous research,this chip extends the operating frequency from 100 to 200 MHz while maintaining efficient performance,representing a significant enhancement in operating frequency.
GaN DC-DC buck convertermonolithic circuitdriveractive pull-up
NETL
NSTL
万方数据
