摘要：本应用笔记介绍了电路之间无缝切换电池供电和USB供电，以最小的电路。该设计采用一个升压转换器架构，在一个LDO （ MAX1792 ）之间连接的USB电源线和一个升压转换器的输出（ MAX1795/MAX1796/MAX1797 ） 。Maxim > App Notes > Circuit Protection Interface Circuits Power-Supply Circuits Keywords: LDO linear regulators, step-up converters, boost converters, USB power, battery operation, hot Sep 16, 2009 swapping APPLICATION NOTE 4445 Boost Converter Switches Between Battery and USB Power By: Kazuma Akabane Abstract: This application note presents a circuit that switches seamlessly between battery power and USB power with minimal circuitry. The design uses a step-up converter architecture in which an LDO (the MAX1792) is connected between the USB power line and the output of a step-up converter (the MAX1795/ MAX1796/MAX1797). This design idea appeared in the November 1, 2006 issue of EE Times Japan, and was posted on the EE Times US website on November 21, 2006. Virtually all PCs n……