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关于TPS74401的应用问题

Other Parts Discussed in Thread: LMR10530

尊敬的TI工程师们,你们好

我在使用你们的这款电源芯片做我的项目的电源管理,要求5V输入,3.3V输出。我想求证一下:

1、若是把IN和BIAS都连接到同一个电源输入,这时候的转化效率是不是很低(DATASHEET上图33表明是45%的转换效率!!)?

2、当我的IN接5V时候,输出要求3.3V,BIAS可以接什么电压?