【摘要】 嵌入式微处理器AU1100用三路开关型稳压器以LT1940、LTC3404为核心。LT1940由7～25VDC输入产生3.3V和5V电压,分别为串口等外设和USB主机口等供电。3.3V作为另路输出电压接LTC3404主电源引脚,产生1.8V电压为嵌入式内核供电。电感器、输入输出电容等外围电子元件经计算后按需求选择。更多还原

【Abstract】 LT1940 and LTC3404 is used as the core of the switching regulator with three voltages supply for the embedded microprocessor AU1100. Firstly, 7-25VDC was inputted into LT1940 and it produced 3.3V and 5V voltage. LT1940 respectively supplied power for serial interface, peripherals and USB host interface etc. 3.3V is used as another output voltage, connected with the pin of main power supply of LTC3404, and LTC3404 produced 1.8V voltage to supply power for the embedded kernel. The power supplies of inductors, input and output capacitors etc are chosen according to requirements after peripheral electronic components were calculated.更多还原