LM5118 低于6V无法工作,UVLO 引脚1.8V大于1.23V 什么原因. Datasheep : Ultra-Wide Input Voltage Range From 3 V to 75 V
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LM5118 低于6V无法工作,UVLO 引脚1.8V大于1.23V 什么原因. Datasheep : Ultra-Wide Input Voltage Range From 3 V to 75 V
因为5118 内部有一个输出为7V的LDO,在启动阶段Vin必须要先启动LDO给内部逻辑供电,才能有输出。
VCC在低于3.7V会触发VCC的欠压保护,芯片被关断,所以VCC在外部供电情况下,Vin才可以3V启动
Hi
将电路图传上来看一下,并说明一下你输入输出规格等相关信息。