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我们正在使用TPS7A8101,发现部分芯片在温度达到-20℃以下时,芯片就会产生异常信号,怀疑是自激(400kHz左右,幅度大概为50mV),当温度升高至10℃左右,信号消失。
把Cbypass由100nF减小至100pF,情况有所改善,但是温度继续降低到-30℃,异常信号又会冒出来,请问该怎么解决?该器件能通过仿真确认吗?
应用场景:Vin=3.65V, Vout=3.3V, Iout=30mA.