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LM317MKTPRG3 bảng dữ liệu(PDF) 8 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  3-Terminal Adjustable Regulator
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LM317MKTPRG3 bảng dữ liệu(HTML) 8 Page - Texas Instruments

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LM317M
SLVS297P – APRIL 2000 – REVISED MARCH 2014
www.ti.com
Feature Description (continued)
7.3.4 Current Sources
The two current sources represent the typical ‘adjust terminal current’ and typical ‘minimum current for
regulation'.
7.4 Device Functional Modes
7.4.1 Normal operation
The device OUTPUT terminal will source current necessary to make OUTPUT terminal 1.25-V greater than
ADJUST terminal to provide output regulation.
7.4.2 Operation With Low Input Voltage
The device requires up to 2.5-V headroom (Vin-Vout) to operate in regulation. With less headroom, the device
may drop out and OUTPUT voltage will be INPUT voltage minus drop out voltage.
7.4.3 Operation at Light Loads
The device passes its bias current to the OUTPUT terminal. The load or feedback must consume this minimum
current for regulation or the output may be too high.
7.4.4 Operation In Self Protection
When an overload occurs the device will shut down Darlington NPN output stage or reduce the output current to
prevent device damage. The device will automatically reset from the overload. The output may be reduced or
alternate between on and off until the overload is removed.
7.4.5 Operation at Light Loads
The device passes its bias current to the OUTPUT terminal. The load or feedback must consume this minimum
current for regulation or the output may be too high.
8
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Product Folder Links: LM317M


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