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LM317DCYRG3 Arkusz danych(PDF) 9 Page - Texas Instruments |
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LM317DCYRG3 Arkusz danych(HTML) 9 Page - Texas Instruments |
9 / 32 page LM317 www.ti.com SLVS044W – SEPTEMBER 1997 – REVISED OCTOBER 2014 8.4 Device Functional Modes 8.4.1 Normal Operation The device OUTPUT pin will source current necessary to make OUTPUT pin 1.25 V greater than ADJUST terminal to provide output regulation. 8.4.2 Operation With Low Input Voltage The device requires up to 3-V headroom (VI – VO) to operate in regulation. With less headroom, the device may drop out and OUTPUT voltage will be INPUT voltage minus drop out voltage. 8.4.3 Operation at Light Loads The device passes its bias current to the OUTPUT pin. The load or feedback must consume this minimum current for regulation or the output may be too high. 8.4.4 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. Copyright © 1997–2014, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM317 |
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