The datasheet doesn't tell this but it is hinted that it is 0.45 ohms plus the output transistor, so it will never go under 0.45 ohms in open-loop but when you apply feedback you will get this:
100 Hz 0.15 mohms
1 kHz 1.5 mohms
10 kHz 15 milliohms
Notice this is in theory but I think we can conclude this with saying : pretty low and nothing to worry about.
Notice also that in many cases you will need some sort of output filter which add at least a couple of millihohms. My filter has 5 mohms.
100 Hz 0.15 mohms
1 kHz 1.5 mohms
10 kHz 15 milliohms
Notice this is in theory but I think we can conclude this with saying : pretty low and nothing to worry about.
Notice also that in many cases you will need some sort of output filter which add at least a couple of millihohms. My filter has 5 mohms.
.Think that it is able to drive a not quite difficult load.- Status
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