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tps62133a-q1带载后电流异常

Other Parts Discussed in Thread: TPS62133A-Q1, TPS62133

本人刚接触电源设计,根据webench生成了一个使用TPS62133a-q1产生5.5-7V—5V/2A的模块,电路图如下

实际测试时,单板使用5V稳压源驱动,电流为0.4A,但使用tps62133a-q1电源模块驱动,电流为1.2A,想询问一下可能是哪方的原因,谢谢!