摘要
提出了一种用于DC-DC的双模控制功率管分段驱动电路。该电路通过检测负载电流的变化,优化功率管大小,从而提高转换效率;提出根据负载电流大小自动切换至PSM控制模式的解决方案,进一步提高极轻负载下的效率。电路基于标准0.13μm CMOS工艺进行设计与仿真,仿真结果表明,与传统不分段DC-DC变换器相比,提出的双模控制分段驱动电路在15mA负载时效率提升5.3%。
An adaptive segment output stage with dual-mode control in DC-DC converter was proposed. According to the load current, optimizing width of the power MOSFET facilitated enhancing conversion efficiency. Specially, in order to improve the efficiency at very light load conditions, PSM controller was included in system which could switch dynamically based on the load current. A dual-mode buck DC-DC converter with the adaptive segment output stage was designed and simulated in a 0.13 μm standard CMOS process. The simulation results showed that the maximum efficiency improvement of the converter with adaptive segment reached 5.3 % at 15 mA compared to converter without segment.
出处
《微电子学》
CAS
CSCD
北大核心
2014年第5期644-646,650,共4页
Microelectronics
关键词
双模控制
功率管分段
PSM控制
轻负载
Dual-mode control
Segment output stage
PSM control
Light load condition
