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TPS54140居然比TPS54140A还便宜，而且TPS54140工作温度范围-40~150℃，TPS54140A为-40~125℃，照这么看选择TPS54140更合适了。是不是存在什么bug？不然新版的TPS54140A参数上应该更有优势才对啊。求解答，正在进行新设计。
Hi
见差异说明： www.ti.com.cn/.../slva592.pdf
