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TPS78230,输入电压增大,功耗增加

输入用3.7V锂电池,TPS78230输出3V,EN脚接VIN,产品待机功耗2uA,最大峰值电流50mA左右。

待机时,发现输入电压从3.6V增加到4.1V时,功耗也会随之增加,会增加几个uA。

看了下手册,输入电压变化时,静态电流基本不变。

EN脚在5.5V输入电压时最大才40nA,可忽略不计。

Ground pin current在待机2uA电流情况下,功耗应该也增加不了多少吧?IOUT = 150 mA时才8 μA。

增加的功耗与LDO有没有关系呢?