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TPS54332是否有low-side MOSFET

Other Parts Discussed in Thread: TPS54332

最近在使用TPS54332产生一个8V-2A的输出,根据芯片手册,该芯片是非同步Buck转换器。但是在10.1节Layout Guidelines中第5行有如下描述,"The source of the low-side MOSFET shoulde be connected directly to the top-side PCB…",查找了整个芯片手册也没有找到low-side mosfet,而且非同步buck也不应该有这个吧?

  • Hi

       没错,这是非同步降压芯片,不存在低边MOS,datasheet描述有误。

       但是你可以将低边MOS理解为续流肖特基。

  • 没有低边MOS,描述的确有点问题,其主要的目的是说肖特基二极管的阳极可以等效理解为MOS的源极,摆放的时候应该和输入输出的地连在一起,以实现最小环路。

    The source of the low-side MOSFET should be connected directly to the top-side PCB ground area used to tie together the ground sides of the input

    and output capacitors, as well as the anode of the catch diode.