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LM138KG-MD8 Fiches technique(PDF) 11 Page - Texas Instruments

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No de pièce LM138KG-MD8
Description  Military Grade 5-A Adjustable Output Linear Regulator
Download  34 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM138KG-MD8 Fiches technique(HTML) 11 Page - Texas Instruments

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LM138QML
www.ti.com
SNVSAA9 – OCTOBER 2017
Product Folder Links: LM138QML
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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.


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