LM109QML_15 Datasheet, PDF (1/17 Pages) Texas Instruments – LM109QML 5-Volt Regulator

LM109QML
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SNVS366A – NOVEMBER 2005 – REVISED APRIL 2013
LM109QML 5-Volt Regulator
Check for Samples: LM109QML
FEATURES
1
•2 Specified to be Compatible, Worst Case, with
TTL and DTL
• Output Current in Excess of 1A
• Internal Thermal Overload Protection
• No External Components Required
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 PFM header, it
can deliver output currents in excess of 200 mA, if
adequate heat sinking is provided. With the TO 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 components. 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
protection.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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