Transcription of LM340/LM78XX Series 3-Terminal Positive Regulators
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LM340/LM78XX Series3-Terminal Positive RegulatorsGeneral DescriptionThe LM140/LM340A/LM340/LM7800C monolithic 3-terminalpositive voltage Regulators employ internal current-limiting,thermal shutdown and safe-area compensation, makingthem essentially indestructible. If adequate heat sinking isprovided, they can deliver over output current. They areintended as fixed voltage Regulators in a wide range ofapplications including local (on-card) regulation for elimina-tion of noise and distribution problems associated withsingle-point regulation. In addition to use as fixed voltageregulators, these devices can be used with external compo-nents to obtain adjustable output voltages and effort was expended to make the entire seriesof Regulators easy to use and minimize the number of exter-nal components. It is not necessary to bypass the output,although this does improve transient response. Input by-passing is needed only if the regulator is located far from thefilter capacitor of the power 5V, 12V, and 15V regulator options are available in thesteel TO-3 power package.
Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
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