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首页> 外文会议>2014 8th International Conference on Integrated Power Systems >A proposal of embedded SoC power supply compatible with a digital block design flow
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A proposal of embedded SoC power supply compatible with a digital block design flow

机译：与数字模块设计流程兼容的嵌入式SoC电源的建议

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The power supply embedded in a SoC in advanced CMOS comprises a power domain per block. The introduction of a local dedicated DC-DC converter modifies significantly the resource usage and the design flow within the valuable digital block. A suitable architecture of Switched Capacitors (SC) DC-DC converter is considered. This architecture must lead to an effective area not larger than the one of the digital block including the power switch ring. The DC-DC converter should provide the necessary voltage ratios what means the usage of a cell-based architecture. The paper details the specifications and operation of the proposed architecture of SC DC-DC converter using MIM capacitors. The capacitors are stacked above the digital area and the power switches are reused by the converter. A special care is provided in the usage of metal resources, the MIM capacitors distribution and interconnections, the clock distribution and the power MOSFET place and route. A proposed SC DC-DC converter of 0.54 mm(exp 2) is implemented in a 28nm FDSOI process from STMicroelectronics. The input voltage is 1.8V. The voltage regulator exhibits 4 conversion ratios: 3:1, 2:1, 3:2 and 4:3. A current density of more than 0.4 A/mm(exp 2) is achieved with 74 % peak efficiency but sufficient flatness. MIM capacitor usage offers no area overhead. Simulation results are discussed. A test chip is under fabrication for experimental results to be presented at time of conference.
机译：嵌入在高级CMOS的SoC中的电源包括每个块一个电源域。本地专用DC-DC转换器的引入极大地改变了宝贵的数字模块内的资源使用和设计流程。考虑了开关电容器（SC）DC-DC转换器的合适架构。这种结构必须导致有效面积不大于包括电源开关环的数字模块之一。 DC-DC转换器应提供必要的电压比，这意味着使用基于单元的体系结构。本文详细介绍了使用MIM电容器的SC DC-DC转换器的建议架构的规格和操作。电容器堆叠在数字区域上方，电源开关由转换器重新使用。在使用金属资源，MIM电容器的分布和互连，时钟的分布以及功率MOSFET的布局和布线时要特别注意。 STMicroelectronics在28nm FDSOI工艺中实现了建议的SC DC-DC转换器0.54 mm（exp 2）。输入电压为1.8V。稳压器具有4个转换比：3：1、2：1、3：2和4：3。以74％的峰值效率实现了大于0.4 A / mm（exp 2）的电流密度，但具有足够的平坦度。使用MIM电容器不会产生面积开销。讨论了仿真结果。正在制造测试芯片，以便在会议时展示实验结果。

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