Datenblatt-Suchmaschine für elektronische Bauteile |
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LM342 Datenblatt(PDF) 1 Page - National Semiconductor (TI) |
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LM342 Datenblatt(HTML) 1 Page - National Semiconductor (TI) |
1 / 6 page TLH10485 June 1989 LM342 Series 3-Terminal Positive Regulators General Description The LM342-XX series of three-terminal regulators is avail- able with several fixed output voltages making them useful in a wide range of applications One of these is local on card regulation eliminating the distribution problems associated with single point regulation The voltages available allow these regulators to be used in logic systems instrumenta- tion HiFi and other solid state electronic equipment Al- though designed primarily as fixed voltage regulators these devices can be used with external components to obtain adjustable voltages and currents The LM342-XX series is available in the plastic TO-202 package This package allows these regulators to deliver over 025A if adequate heat sinking is provided Current lim- iting is included to limit the peak output current to a safe value Safe area protection for the output transistor is pro- vided to limit internal power dissipation If internal power dissipation becomes too high for the heat sinking provided the thermal shutdown circuit takes over preventing the IC from overheating Considerable effort was expended to make the LM342-XX series of regulators easy to use and minimize the number of external components It is not necessary to bypass the output although this does improve transient response Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply For output voltage other than 5V 12V and 15V the LM117 series provides an output voltage range from 12V to 57V Features Y Output current in excess of 025A Y Internal thermal overload protection Y No external components required Y Output transistor safe area protection Y Internal short circuit current limit Y Available in plastic TO-202 package Y Special circuitry allows start-up even if output is pulled to negative voltage (gsupplies) Voltage Range LM342-50 5V LM342-12 12V LM342-15 15V Schematic Diagram TLH10485 – 1 C1995 National Semiconductor Corporation RRD-B30M115Printed in U S A |
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Ähnliche Beschreibung - LM342 |
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