请教: 怎么知道一个芯片是民用级、工业级、还是军用级呀? 比如: 1.LM3488:High Efficiency Low-Side N-Channel Controller for Switching Regulators,这个芯片是哪个级别的芯片,在该芯片的英文pdf资料中,该如何查找呢? 2.MAX618: CMOS, PWM, step-up DC-DC converter generates output voltages up to 28V and accepts inputs from +3V to +28V.这个芯片是哪个级别的芯片,在该芯片的英文pdf资料中,该如何查找呢? 3.LM2679:SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit。这个芯片是哪个级别的芯片,在该芯片的英文pdf资料中,该如何查找呢? 谢谢! |