Calculating MC7805 parameters using datasheet

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To calculate Line Regulation and Load Regulation for the MC7805, the user seeks clarification on the specific voltage and current values needed from the datasheet. Line Regulation is defined as the change in output voltage (ΔVo) over the change in input voltage (ΔVI), while Load Regulation is the change in output voltage (ΔVL) over the change in load current (ΔIL). The datasheet provides input voltage (VI), but the user questions the exact values for ΔVo, ΔVL, and the corresponding currents. They aim to apply the test parameters from the datasheet to compute these regulations accurately. The discussion emphasizes the need for precise values to perform the calculations correctly.
peripatein
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Hi,
I am asked to determine the Line Regulation and Load Regulation based on the attached datasheet, using the test circuit parameters listed there.

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The Attempt at a Solution


Line Regulation is defined as ΔVo/ΔVI whereas Load Regulation is defined thus ΔVL/ΔIL, unless I'm mistaken. The datasheet lists VI but what are the values of the various voltage differences required to complete the calculation? Also, what are the values of VL and IL? Are they the values of Vo and Io, respectively?
 

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I'd interpret this to be the data you need. You can determine typical regulation, and worst case, over a narrow range and a wide range.

reg.png
 
I understand how to extract the line regulation and load regulation from the table, but my question was different. I'd like to use the test parameters in the datasheet attached to calculate them (probably using the formulae listed in #1 above). How should THAT be carried out?
 

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