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LM138KG-MD8 Fiches technique(PDF) 11 Page - Texas Instruments |
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LM138KG-MD8 Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 34 page 11 LM138QML www.ti.com SNVSAA9 – OCTOBER 2017 Product Folder Links: LM138QML Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 7.4 Device Functional Modes 7.4.1 Normal Operation The device OUTPUT pin sources current necessary to make the OUTPUT pin 1.25-V greater than the ADJUST terminal to provide output regulation. 7.4.2 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 the OUTPUT voltage is then the INPUT voltage minus the drop out voltage. 7.4.3 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. A 250-Ω feedback resistor between OUTPUT and ADJUST consumes the worst case minimum load current of 5 mA. 7.4.4 Operation in Self Protection When an overload occurs, the device shuts down the Darlington NPN output stage or reduces the output current to prevent device damage. The device automatically resets from the overload. The output may be reduced or alternate between on and off until the overload is removed. |
Numéro de pièce similaire - LM138KG-MD8 |
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Description similaire - LM138KG-MD8 |
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