LM109JAN Datasheet, PDF (1/16 Pages) List of Unclassifed Manufacturers – 5-Volt Regulator

LM109JAN
OBSOLETE
September 24, 2010
5-Volt Regulator
General Description
The LM109 series are complete 5V regulators fabricated on
a single silicon chip. They are designed for local regulation on
digital logic cards, eliminating the distribution problems asso-
ciation with single-point regulation. The devices are available
in two standard transistor packages. In the solid-kovar TO-5
header, it can deliver output currents in excess of 200 mA, if
adequate heat sinking is provided. With the TO-3 power pack-
age, the available output current is greater than 1A.
The regulators are essentially blowout proof. Current limiting
is included to limit the peak output current to a safe value. In
addition, thermal shutdown is provided to keep the IC from
overheating. If internal dissipation becomes too great, the
regulator will shut down to prevent excessive heating.
Considerable effort was expended to make these devices
easy to use and to minimize the number of external compo-
nents. It is not necessary to bypass the output, although this
does improve transient response somewhat. Input bypassing
is needed, however, if the regulator is located very far from
the filter capacitor of the power supply. Stability is also
achieved by methods that provide very good rejection of load
or line transients as are usually seen with TTL logic.
Although designed primarily as a fixed-voltage regulator, the
output of the LM109 series can be set to voltages above 5V,
as shown. It is also possible to use the circuits as the control
element in precision regulators, taking advantage of the good
current-handling capability and the thermal overload protec-
tion.
Features
■ ^{Specified to be compatible, worst case, with TTL and DTL}
■ ^{Output current in excess of 1A}
■ ^{Internal thermal overload protection}
■ ^{No external components required}
Ordering Information
NS Part Number
JL109BXA
JL109BYA
JAN Part Number
JM38510/10701BXA
JM38510/10701BYA
Connection Diagrams
NS Package Number
H03A
K02C
Package Description
3LD Metal Can
2LD T0–3 Metal Can
Metal Can Packages
20154933
See NS Package Number H03A
Bottom View
20154934
See NS Package Number K02C
Bottom View
© 2010 National Semiconductor Corporation 201549
201549 Version 2 Revision 5 Print Date/Time: 2010/09/29 23:06:55
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