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LM317AEMPX/NOPB 데이터시트(PDF) 1 Page - Texas Instruments

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부품명 LM317AEMPX/NOPB
상세설명  LM117/LM317A/LM317-N 3-Terminal Adjustable Regulator
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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LM117, LM317-N
www.ti.com
SNVS774L – MAY 2004 – REVISED FEBRUARY 2011
LM117/LM317A/LM317-N 3-Terminal Adjustable Regulator
Check for Samples: LM117, LM317-N
Normally, no capacitors are needed unless the device
1
FEATURES
is situated more than 6 inches from the input filter
2
Specified 1% Output Voltage Tolerance
capacitors in which case an input bypass is needed.
(LM317A)
An optional output capacitor can be added to improve
Specified Max. 0.01%/V Line Regulation
transient response. The adjustment terminal can be
bypassed to achieve very high ripple rejection ratios
(LM317A)
which are difficult to achieve with standard 3-terminal
Specified Max. 0.3% Load Regulation (LM117)
regulators.
Specified 1.5A Output Current
Besides replacing fixed regulators, the LM117 is
Adjustable Output Down to 1.2V
useful in a wide variety of other applications. Since
Current Limit Constant With Temperature
the regulator is “floating” and sees only the input-to-
output
differential
voltage,
supplies
of
several
P+ Product Enhancement Tested
hundred volts can be regulated as long as the
80 dB Ripple Rejection
maximum input to output differential is not exceeded,
Output is Short-Circuit Protected
i.e., avoid short-circuiting the output.
Also, it makes an especially simple adjustable
DESCRIPTION
switching regulator, a programmable output regulator,
The LM117 series of adjustable 3-terminal positive
or by connecting a fixed resistor between the
voltage regulators is capable of supplying in excess
adjustment pin and output, the LM117 can be used
of 1.5A over a 1.2V to 37V output range. They are
as a precision current regulator. Supplies with
exceptionally easy to use and require only two
electronic shutdown can be achieved by clamping the
external resistors to set the output voltage. Further,
adjustment terminal to ground which programs the
both line and load regulation are better than standard
output to 1.2V where most loads draw little current.
fixed regulators. Also, the LM117 is packaged in
standard
transistor
packages
which
are
easily
For applications requiring greater output current, see
mounted and handled.
LM150 series (3A) and LM138 series (5A) data
sheets. For the negative complement, see LM137
In
addition
to
higher
performance
than
fixed
series data sheet.
regulators, the LM117 series offers full overload
protection available only in IC's. Included on the chip
are current limit, thermal overload protection and safe
area protection. All overload protection circuitry
remains fully functional even if the adjustment
terminal is disconnected.
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 © 2004–2011, 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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