Calculating MC7805 parameters using datasheet

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SUMMARY

The discussion focuses on calculating Line Regulation and Load Regulation for the MC7805 voltage regulator using its datasheet. Line Regulation is defined as ΔVo/ΔVI, while Load Regulation is defined as ΔVL/ΔIL. Participants seek clarification on the specific voltage differences and current values needed for these calculations, particularly the values of VL and IL, which are interpreted as Vo and Io, respectively. The conversation emphasizes the importance of using the test circuit parameters provided in the datasheet to accurately perform these calculations.

PREREQUISITES
  • Understanding of voltage regulation concepts, specifically Line Regulation and Load Regulation.
  • Familiarity with the MC7805 voltage regulator specifications and datasheet.
  • Basic knowledge of electrical circuit analysis and parameters.
  • Ability to interpret and utilize datasheet information for practical calculations.
NEXT STEPS
  • Review the MC7805 datasheet for detailed specifications and test circuit parameters.
  • Learn how to calculate Line Regulation and Load Regulation using specific voltage and current values.
  • Explore practical examples of voltage regulation calculations in electronic circuits.
  • Investigate the impact of varying input voltage on the performance of the MC7805.
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Electrical engineers, students studying electronics, and anyone involved in designing circuits with voltage regulators, particularly those working with the MC7805.

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.

Homework Statement

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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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