可以考虑SEPIC电路或稳压电荷泵
SEPIC:MCP1650, SEPIC演示板<br />电荷泵:MCP1252 <br /> 相关链接:<a href='http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en500061'>http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en500061</a>
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