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L7805 Fiches technique(PDF) 37 Page - STMicroelectronics

No de pièce L7805
Description  Positive voltage regulators
PDF  56 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7805 Fiches technique(HTML) 37 Page - STMicroelectronics

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L78xx - L78xxC
Typical performance
37/56
Note:
Q2 is connected as a diode in order to compensate the variation of the Q1 VBE with the
temperature. C allows a slow rise time of the VO.
Figure 35.
Adjustable output voltage with temperature compensation
VO = VXX (1+R2/R1) + VBE
Figure 36.
Light controllers (VOmin = VXX + VBE)
VO rises when the light goes up
VO falls when the light goes up



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