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LM117QML Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce LM117QML
Description  3-Terminal Adjustable Regulator
Download  37 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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LM117QML, LM117QML-SP
www.ti.com
SNVS356D – MARCH 2006 – REVISED APRIL 2013
LM117QML 3-Terminal Adjustable Regulator
Check for Samples: LM117QML, LM117QML-SP
1
FEATURES
DESCRIPTION
The LM117 series of adjustable 3-terminal positive
2
Available with Radiation Ensured
voltage regulators is capable of supplying either 0.5A
High Dose Rate 100 krad(Si)
or 1.5A over a 1.2V to 37V output range. They are
ELDRS Free 100 krad(Si)
exceptionally easy to use and require only two
external resistors to set the output voltage. Further,
Specified max. 0.3% Load Regulation (LM117)
both line and load regulation are better than standard
Specified 0.5A or 1.5A Output Current
fixed regulators.
Adjustable Output Down to 1.2V
In
addition
to
higher
performance
than
fixed
Current Limit Constant with Temperature
regulators, the LM117 series offers full overload
80 dB Ripple Rejection
protection available only in IC's. Included on the chip
are current limit, thermal overload protection and safe
Output is Short-Circuit Protected
area protection. All overload protection circuitry
remains fully functional even if the adjustment
terminal is disconnected.
Normally, no capacitors are needed unless the device
is situated more than 6 inches from the input filter
capacitors in which case an input bypass is needed.
An optional output capacitor can be added to improve
transient response. The adjustment terminal can be
bypassed to achieve very high ripple rejection ratios
which are difficult to achieve with standard 3-terminal
regulators.
Besides replacing fixed regulators, the LM117 is
useful in a wide variety of other applications. Since
the regulator is "floating" and sees only the input-to-
output
differential
voltage,
supplies
of
several
hundred volts can be regulated as long as the
maximum input to output differential is not exceeded,
i.e., avoid short-circuiting the output.
Also, it makes an especially simple adjustable
switching regulator, a programmable output regulator,
or by connecting a fixed resistor between the
adjustment pin and output, the LM117 can be used
as a precision current regulator. Supplies with
electronic shutdown can be achieved by clamping the
adjustment terminal to ground which programs the
output to 1.2V where most loads draw little current.
For the negative complement, see LM137 series data
sheet.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2013, Texas Instruments Incorporated
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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