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/content/maximintegrated/zh/products/power/switching-regulators/step-down-up-buck-boost 
Using a Peak-Current-Mode Controller to Design a Boost Converter
High-Efficiency Boost Converter Provides 48V for IP Phones
Mobile Power Selector Guide 
EE-Sim: Design and Simulate 
升/降压开关调节器也称为升/降压转换器，输出的调节电压可高于或低于输入电压。升/降压转换器在单片DC-DC转换器中集成升压和降压技术，能够支持较宽范围的输入电压，输入电压可高于或低于电路要求的电压。
降压转换器可理想用于便携式设备，此时电源通常为单节电池。电池电压的摆幅范围为高于电路要求电压的某个值(充满电时)到低于要求电压的某个值(电池放电时)。升/降压转换器在前者情况下将电压升高，在后者情况下将电压降低。
按应用查看开关调节器的选型信息。
按关键参数选择
推荐的升/降压调节器，5V输入 
推荐的升/降压调节器，12V输入
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Using a Peak-Current-Mode Controller to Design a Boost Converter High-Efficiency Boost Converter Provides 48V for IP Phones Mobile Power Selector Guide 技术文档
参考设计
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Power over Ethernet (PoE) is a technology that allows network cables to deliver power to a power...
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The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...
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Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1102：小尺寸、24V/250mA、无光耦、反激DC-DC转换器，92%效率
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Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
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