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¡¡¡¡Similarly£¬ their efficient charge/discharge characteristics make them well suited to specialized demands of microharvesting applications that must periodically ¡°cold boot¡± after an extended absence of ambient energy has depleted all onboard charge storage devices. Here£¬ the full application circuitry is reenergized sequentially after microharvesting circuitry first charges a bootstrap supercapacitor used to power subsequent stages of the bootstrap process.

¡¡¡¡A typical microharvesting application uses supercapacitors as the sole storage device or as supplemental storage for peak or cold boot requirements £¨Figure 1£©¡£ For load management£¬ a DC/DC converter is required to maintain a stable supply voltage to the load because the voltage output of a supercapacitor is linearly proportional to the charge on the supercap. Engineers will typically use a buck-boost converter with low dropout to extract maximum power from the supercap even as charge levels drop under load.