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L78M Datasheet(PDF) 21 Page - STMicroelectronics

Part # L78M
Description  Precision 500 mA regulators
PDF  45 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L78M Datasheet(HTML) 21 Page - STMicroelectronics

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Figure 25. High input voltage circuit
VIN = VI - (VZ + VBE)
AMG080320171815MT
Figure 26. Reducing power dissipation with dropping resistor
V
-V -V
R = __
I(mi
___
n)____
XX___DRO
____
P(max)
____
IO(max)+Id(max)
AMG080320171816MT
Figure 27. Power AM modulator (unity voltage gain, IO ≤ 0.5)
AMG080320171817MT
Note:
The circuit performs well up to 100 kHz.
L78M
Design considerations
DS0425 - Rev 24
page 21/45



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