TPS61252DSG 在使用时,EN脚接低(0v),为什么输出电压还有稳定的2.5V左右?啥原因呀?求教...
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Hi
见datasheet 说明:
The advantage of TPS61252 is that this converter is disconnecting the output from the input of the power supply when it is disabled.
当EN接GND时还有输出电压意味着连接输出的PMOS出现异常,只有它导通才有输出电压。
Hi
建议你确认一下EN脚是否焊接好处于悬空?,以及它是否确实小于0.4V(不是1V)?
否则需要更换芯片确认一下是不是芯片不良造成的。