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LM317 Datasheet(Fiches technique) 1 Page - Texas Instruments

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Numéro de pièce LM317
Description  3-TERMINAL ADJUSTABLE REGULATOR
Télécharger  22 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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www.ti.com
FEATURES
DCY (SOT-223) PACKAGE
(TOP VIEW)
INPUT
OUTPUT
ADJUST
KTE PACKAGE
(TOP VIEW)
INPUT
OUTPUT
ADJUST
KC (TO-220) PACKAGE
(TOP VIEW)
OUTPUT
INPUT
ADJUST
KTT (TO-263) PACKAGE
(TOP VIEW)
INPUT
OUTPUT
ADJUST
OUTPUT
INPUT
ADJUST
KCS (TO-220) PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
LM317
3-TERMINAL ADJUSTABLE REGULATOR
SLVS044R – SEPTEMBER 1997 – REVISED APRIL 2007
• Output Voltage Range Adjustable From 1.25 V
• Thermal Overload Protection
to 37 V
• Output Safe-Area Compensation
• Output Current Greater Than 1.5 A
• Internal Short-Circuit Current Limiting
The LM317 is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over
an output-voltage range of 1.25 V to 37 V. It is exceptionally easy to use and requires only two external resistors
to set the output voltage. Furthermore, both line and load regulation are better than standard fixed regulators.
In addition to having higher performance than fixed regulators, this device includes on-chip current limiting,
thermal overload protection, and safe operating-area protection. All overload protection remains fully functional,
even if the ADJUST terminal is disconnected.
The LM317 is versatile in its applications, including uses in programmable output regulation and local on-card
regulation. Or, by connecting a fixed resistor between the ADJUST and OUTPUT terminals, the LM317 can
function as a precision current regulator. An optional output capacitor can be added to improve transient
response. The ADJUST terminal can be bypassed to achieve very high ripple-rejection ratios, which are difficult
to achieve with standard three-terminal regulators.
ORDERING INFORMATION(1)
TA
PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
PowerFLEX™ – KTE
Reel of 2000
LM317KTER
LM317
Tube of 80
LM317DCY
SOT-223 – DCY
L3
Reel of 2500
LM317DCYR
0
°C to 125°C
TO-220 – KC
Tube of 50
LM317KC
LM317
TO-220, short shoulder – KCS
Tube of 20
LM317KCS
TO-263 – KTT
Reel of 500
LM317KTTR
LM317
(1)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
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.
PowerFLEX, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 1997–2007, 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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