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TPS63020: The boost could not be achieved

Part Number: TPS63020


Hi,

Could you please help me? Here is the schematic diagram. I want to upgrade 3V to 3.3V and use 3V button battery to supply power to TPS63020, but I don't know where there seems to be a problem in the booster circuit, resulting in only 2.1V output voltage. When I use 3.6V battery to supply power, it can be used normally. Could you please help me find out what is wrong with my circuit? Does the chip have requirements for input current?should I do?

Thanks.

  • Hi

       电路可以借助芯片官网的在线仿真webench确认下。主要注意功率电感饱和电流足够大。

       layout上需要注意输入电容尽量靠近芯片Vin脚, 以及功率回路尽量小。(具体可以参考datasheet)