环境供电MCU设计中的生存功率损耗

　　环境供电MCU设计中的生存功率损耗

　　在创建基于单片机设计的环境能源动力，工程师们可以期待限电甚至间歇性损失。电源监控和上电复位顺序起着至关重要的作用，以确保正确的操作，这些设计。这些设计，工程师可以帮助确保可靠的操作情况，通过一些简单的技巧与ICS ATMEL，Diodes公司、仙童半导体，线性技术，麦瑞半导体芯片技术，半导体，Silicon Labs，意法半导体功率损失，德克萨斯文书，其中。

　　由环境能量供电，基于单片机的设计，如无线传感器、智能设备，和新兴的物联网（IOT）微粒保持数十年的理想承诺，无电池操作。在实践中，任何实际的环境源可能会低于最低要求的功率水平，甚至暂时下降到零，因为，例如，阴影穿过太阳能电池或驱动压电换能器的振动下降。

　　Energy storage devices such as supercapacitors or thin-film batteries can provide sustained power during periods of ambient energy decline or loss. In any real design， however， the combination of leakage current and MCU power consumption even in its ultra-low-power sleep mode could eventually drain available power reserves. In fact， designers cannot simply rely on MCU low-power modes to ensure available power in energy-limited harvesting designs. A typical MCU-based wireless sensor will likely consume significantly more overall power while in extended sleep states than in active states （Figure 1）。 Designers face this challenge even with devices available in the industry‘s lowest power MCU families， such as the Atmel tinyAVR， Microchip Technology XLP， Silicon Labs Zero Gecko， STMicroelectronics STM32 L1， Texas Instruments 8-MHz MSP430x1xx and 16-MHz MSP430x2xx， among other MCU series.