我把稳压块换成lf50了，问题依旧。。。lf50的输出电流可是1a阿。。。 我用usb供电的话pc机的usb总线上的5v电压降低成3.7伏左右。。。 ...
LF500-PAC-EV,BOARD EVAL ISPXPGA PAC PMGR 1208
【STMicroelectronics】LF50ABDT,IC REG LDO 5V .5A DPAK
【STMicroelectronics】LF50ABDT-TR,IC REG LDO 5V .5A DPAK
【STMicroelectronics】LF50ABDT-TRY,IC REG LDO 5V .5A DPAK
【STMicroelectronics】LF50ABP,IC REG LDO 5V .5A TO-220FP
【STMicroelectronics】LF50ABPT,IC REG LDO 5V .5A P-PAK
【STMicroelectronics】LF50ABPT-TR,IC REG LDO 5V .5A P-PAK
【STMicroelectronics】LF50ABV,IC REG LDO 5V .5A TO-220
