lm2940输出端不接电容电压5.75V

来源：百度知道 编辑：UC知道 时间：2024/09/23 19:37:10
如题 LM2940输出端不加电容的时候输出电压达到5.75(输入7.80V),加上电容输出电压是4.96V 问这个LM2940是不是损坏了?
LM2940-5.0输出电压理论值是+5V

没有损坏。pdf上指出必须要接电容。
**COUT must be at least 22 μF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible
to the regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve.