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ldo芯片LP3985,5V输入,芯片规格LP3985IM5-4.7/4.8/5 选哪个?

Other Parts Discussed in Thread: LP3985

求专家们知道:

想把5V开关电源转为线性电源(尽量接近5v,1~50mA),给运放OP2317供电,现选择LP3985,但是型号不知道选哪个?

若有其他合适芯片亦可。