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I will be using a TPS7H1101A LDO and wanted to calculate the accuracy of it. I see in the datasheet they list the output voltage accuracy of +/- 2%. I think this number in some datasheets covers the line and load regulation as well but not sure as they are specified separately. Line and load regulation are .07%/V and .08%/A respectively. Do I need to add these in as well or are they covered by the 2% value? If so, I am assuming I would need to know the input voltage variation from the supply feeding this one?

Thanks! datasheet link

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2 Answers 2

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The datasheet explicitly mentions input and output variations, so line and load regulations are covered. The (1) note just mentions what is covered by production tests.

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    \$\begingroup\$ Oops missed that. Thanks! So the only other factor I guess would be the accuracy of the resistor values? \$\endgroup\$
    – Matty
    Commented Oct 16, 2021 at 12:43
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    \$\begingroup\$ Yes. The datasheet mentions the full range. I'd recommend looking at the SMD datasheet for further information. You'd get actual testing data from the vendor if you have the date code \$\endgroup\$
    – Stoic_beast
    Commented Oct 16, 2021 at 14:02
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Do I need to add these in as well or are they covered by the 2% value?

The first page states this: -

±2% accuracy over line, load, and temperature

But, it's likely that's a typical value. However, having read further into the data sheet it does look like this is the maximum value for output accuracy given the line and load conditions specified.

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