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LM7805CT Datasheet(PDF) 24 Page - Fairchild Semiconductor

Part No. LM7805CT
Description  3-Terminal 1A Positive Voltage Regulator
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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 24 page
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24
www.fairchildsemi.com
LM78XX/LM78XXA Rev. 1.0
Figure 13. Adjustable Output Regulator (7V to 30V)
Figure 14. High Current Voltage Regulator
Figure 15. High Output Current with Short Circuit Protection
LM741
-
+
2
3
6
4
2
3
1
0.33
µF
CI
Input
Output
0.1
µF
CO
LM7805
10k
IRI ≥ 5 IQ
VO = VXX(1+R2/R1)+IQR2
3
2
1
LM78XX
Output
Input
R1
3
0.33µF
IREG
0.1µF
IO
IQ1
IO = IREG + BQ1 (IREG–VBEQ1/R1)
Q1 BD536
R1 =
VBEQ1
IREG–IQ1 BQ1
LM78XX
Output
0.1µF
0.33µF
R1
3
3
2
1
Q1
Input
Q2
Q1 = TIP42
Q2 = TIP42
RSC =
ISC
VBEQ2
RSC




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