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L7805 Scheda tecnica(PDF) 35 Page - STMicroelectronics

Il numero della parte L7805
Spiegazioni elettronici  Positive voltage regulators
PDF  47 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7805 Scheda tecnica(HTML) 35 Page - STMicroelectronics

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L7800 series
Typical performance
35/47
1.
Application with high capacitance loads and an output voltage greater than 6 volts need an external diode
(see fig. 32) to protect the device against input short circuit. In this case the input voltage falls rapidly while
the output voltage decrease slowly. The capacitance discharges by means of the Base-Emitter junction of
the series pass transistor in the regulator. If the energy is sufficiently high, the transistor may be destroyed.
The external diode by-passes the current from the IC to ground.
Figure 36.
Protection against input short-circuit with high capacitance loads



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