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LD39200 bảng dữ liệu(PDF) 13 Page - STMicroelectronics

tên linh kiện LD39200
Giải thích chi tiết về linh kiện  Reverse current protection
PDF  30 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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LD39200 bảng dữ liệu(HTML) 13 Page - STMicroelectronics

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LD39200
Application information
DocID025637 Rev 1
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6.6
Reverse current protection
The device avoids the reverse current to flow from the output to the input during any
operating condition (EN=0 or EN=1, VIN>VOUT+VDROP). During fast turn-on/off this function
prevents a big current from flowing to the input. Moreover it is used to avoid the reverse
current to flow from the output pin to the input one, when other power supplies, providing a
voltage higher than the input voltage, are connected to the output pin. If a power supply,
providing a voltage lower than LDO output voltage, is connected to OUT pin, LDO works in
current protection, causing high power dissipation inside the device.
When the device is disabled (EN=low) and VOUT>0 V, a small current (few µA) is sunk from
the OUT pin.



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