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L7805 데이터시트(PDF) 36 Page - STMicroelectronics

부품명 L7805
상세설명  Positive voltage regulator ICs
PDF  57 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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L7805 데이터시트(HTML) 36 Page - STMicroelectronics

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Application information
L78xx, L78xxC, L78xxAB, L78xxAC
36/57
DocID2143 Rev 31
Note:
Application with high capacitance loads and an output voltage greater than 6 volts need an
external diode (see Figure 23 on page 34) 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 28. Protection against input short-circuit with high capacitance loads



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