这几天在测试一款DC-DC升压芯片，当接入负载后电路会发出“吱吱”的叫声，同时带载能力严重不足，输入电压为4V，输出电压为+5V，接入负载电流为400mA左右，此时电压跌落至4V左右，规格书中标识的带载能力为2A，有遇到过类似问题的同学们，怎么解决的？
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