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L78 Datasheet(PDF) 28 Page - STMicroelectronics

Part # L78
Description  Positive voltage regulator ICs
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L78 Datasheet(HTML) 28 Page - STMicroelectronics

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Figure 24. Remote shutdown
GAMG220920161022MT
Figure 25. Power AM modulator (unity voltage gain, IO ≤ 0.5)
GAMG220920161023MT
Note:
The circuit performs well up to 100 kHz.
Figure 26. Adjustable output voltage with temperature compensation
VO = VXX (1+R2/R1) + VBE
GAMG220920161024MT
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.
L78
Design consideration
DS0422 - Rev 36
page 28/55



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