XTR115 VREG min and max cap size

John Samperi

Other Parts Discussed in Thread: XTR115

I have a design that needs a 3V supply therefore I'm feeding VREG into a 3V LDO regulator.

I don't see in the data sheet any indication as to the size of the cap across the 5V VREG pin, I have a 100nF there at the moment but the regulator wants a 1uF.

What is the range of capacitance allowed on that pin? I see that VREF has some info for that but nothing about VREG.

over 8 years ago

0 John Samperi over 8 years ago

Prodigy 120 points

I see a few threads with a similar question, maybe a definitive answer on the datasheet would save people harassing TI. :-)

0 Collin Wells over 8 years ago in reply to John Samperi

TI__Guru 63965 points

Hello John,

We've performed testing in this area and the XTR115/116/117 VREG output is stable with load capacitances from 0nF - 10uF. We didn't test any higher but it likely remains stable with higher output capacitance as well.

0 John Samperi over 8 years ago in reply to Collin Wells

Prodigy 120 points

Thanks Colin, good to know.

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XTR115 VREG min and max cap size