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请问5v转-3.3v有没有什么芯片可以使用?(作为一些运放的负电源)或者什么电路?

Other Parts Discussed in Thread: LMZ34002

查到的是用lmz34002,不过好像管脚好多好多,但是很多用不到,有没有什么其他芯片可以使用?