LM109H National Semiconductor, LM109H Datasheet
LM109H
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LM109H Summary of contents
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... Considerable effort was expended to make these devices easy to use and to minimize the number of external compo- nents not necessary to bypass the output, although this Schematic Diagram © 1999 National Semiconductor Corporation DS007138 does improve transient response somewhat. Input bypass- ing is needed, however, if the regulator is located very far from the filter capacitor of the power supply ...
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... Note 3: Without a heat sink, the thermal resistance of the TO-39 package is about 150˚C/W, while that of the TO-3 package is approximately 35˚C/W. With a heat sink, the effective thermal resistance can only approach the values specified, depending on the efficiency of the sink. Note 4: Refer to RETS109H drawing for LM109H or RETS109K drawing for LM109K military specifications. Connection Diagrams ...
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Application Hints 1. Bypass the input of the LM109 to ground with ceramic or solid tantalum capacitor if main filter capaci- tor is more than 4 inches away. 2. Avoid insertion of regulator into “live” socket if input voltage is ...
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... Typical Performance Characteristics Maximum Average Power Dissipation (LM109H) DS007138-19 Current Limit Characteristics (Note 5) DS007138-22 Note 5: Current limiting foldback characteristics are determined by input output differential, not by output voltage. Input-Output Differential (V) DS007138-25 www.national.com (Continued) Maximum Average Power Dissipation (LM309H) DS007138-20 Thermally Induced Output ...
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Typical Performance Characteristics Quiescent Current DS007138-28 Line Transient Response DS007138-31 Typical Applications Fixed 5V Regulator *Required if regulator is located more than 4" from power supply filter capacitor. † Although no output capacitor is needed for stability, it does improve ...
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Typical Applications (Continued) *Regulation better than 0.01%, load, line and temperature, can be obtained. † Determines zener current. May be adjusted to minimize thermal drift. ‡ Solid tantalum. *Determines output current. If wirewound resistor is used, bypass with 0.1 µF. ...
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... Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM109H, LM109H/883 or LM309H Order Number LM109K STEEL, LM309K STEEL Metal Can Package (H) NS Package Number H03A Metal Can Package (K) NS Package Number K02A 7 www.national.com ...
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