小弟先谢过
要翻译的片段如下:
The layout is very important when desinging high frequency switching converters.Layout will
affect noise pickup and can cause a good design to perform with less than expected results.
Start to place the power components,make all the connection in the top layer with wide,copper
filled areas. The inductor,output capacitor and the MOSFET should be close to each other as possible. This helps to reduce the EMI radiated by the power traces due to the high switching currents through them. Place input capactior directly to the drain of the high-side MOSFET,to reduce the ESR replace the single input capacitor with two parallel units. The feedbuck part of the
system should be kept away form the inductor and other noise sources,and be placed close to the IC. In multiplayer PCB use one layer as power ground plane and have a control circuit ground(analog ground), to which all signals are referenced. The goal is to localize the high current path to a separate loop that does not interfere with the more sensitive analog control function. These two grounds must be connected together on the PC board layout at a single point.
