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LP3878 bảng dữ liệu(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LP3878
Giải thích chi tiết về linh kiện  Micropower 800mA Low Noise Ceramic Stable Voltage Regulator for Low Voltage Applications Designed for Use with Very Low ESR Output Capacitors
PDF  11 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3878 bảng dữ liệu(HTML) 10 Page - National Semiconductor (TI)

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Application Hints (Continued)
To assure proper operation, the signal source used to drive
the Shutdown input must be able to swing above and below
the specified turn-on/turn-off voltage thresholds listed in the
Electrical Characteristics section under V
ON/OFF.
REVERSE INPUT-OUTPUT VOLTAGE
The PNP power transistor used as the pass element in the
LP3878 has an inherent diode connected between the regu-
lator output and input.
During normal operation (where the input voltage is higher
than the output) this diode is reverse-biased.
However, if the output is pulled above the input, this diode
will turn ON and current will flow into the regulator output.
In such cases, a parasitic SCR can latch which will allow a
high current to flow into V
IN (and out the ground pin), which
can damage the part.
In any application where the output may be pulled above the
input, an external Schottky diode must be connected from
V
IN to VOUT (cathode on VIN, anode on VOUT), to limit the
reverse voltage across the LP3878 to 0.3V (see Absolute
Maximum Ratings).
www.national.com
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