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LM109QML 데이터시트(PDF) 2 Page - Texas Instruments

부품명 LM109QML
상세설명  LM109QML 5-Volt Regulator
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LM109QML
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
association 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 package, 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 bypass-
ing 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
protection.
Features
n
Specified to be compatible, worst case, with TTL and
DTL
n
Output current in excess of 1A
n
Internal thermal overload protection
n
No external components required
Ordering Information
NS Part Number
SMD Part Number
NS Package Number
Package Description
LM109H/883
H03A
3LD TO-39 Metal Can
LM109K/883
K02C
2LD TO-3 Metal Can
Connection Diagrams
Metal Can Packages
20149933
See NS Package Number H03A
Bottom View
20149934
See NS Package Number K02C
Bottom View
November 2005
© 2005 National Semiconductor Corporation
DS201499
www.national.com


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