Datasheet Texas Instruments LM317DCY

ManufacturerTexas Instruments
SeriesLM317
Part NumberLM317DCY
Datasheet Texas Instruments LM317DCY

3/4 Pin 1.5A Adjustable Positive Voltage Regulator 4-SOT-223 0 to 125

Datasheets

LM317 3-Terminal Adjustable Regulator datasheet
PDF, 1.2 Mb, Revision: X, File published: Sep 14, 2016
Extract from the document

Prices

Status

Lifecycle StatusActive (Recommended for new designs)
Manufacture's Sample AvailabilityNo

Packaging

Pin4
Package TypeDCY
Industry STD TermSOT-223
JEDEC CodeR-PDSO-G
Package QTY80
CarrierTUBE
Device MarkingL3
Width (mm)3.5
Length (mm)6.5
Thickness (mm)1.6
Pitch (mm)2.3
Max Height (mm)1.8
Mechanical DataDownload

Parametrics

Accuracy5 %
FeaturesN/A
Iout(Max)1.5 A
Iq(Typ)3.5 mA
Noise38 uVrms
Operating Temperature Range0 to 125 C
Output Capacitor TypeNon-Ceramic
Output OptionsAdjustable Output
PSRR @ 100KHz38 dB
Package GroupSOT-223
Package Size: mm2:W x L4SOT-223: 46 mm2: 7 x 6.5(SOT-223) PKG
RatingCatalog
Regulated Outputs1
Thermal Resistance ОёJA24 В°C/W
Vdo(Typ)2000 mV
Vin(Max)40 V
Vin(Min)3 V
Vout(Max)37 V
Vout(Min)1.25 V

Eco Plan

RoHSCompliant

Design Kits & Evaluation Modules

  • Evaluation Modules & Boards: LM317A-337N-EVM
    3-Terminal Adjustable Regulators Evaluation Module
    Lifecycle Status: Active (Recommended for new designs)

Application Notes

  • High Stability Regulators
    PDF, 104 Kb, File published: Oct 3, 2002
  • AN-178 Applications for an Adjustable IC Power Regulator (Rev. B)
    PDF, 219 Kb, Revision: B, File published: May 5, 2013
    This application report provides applications for the Texas Instruments LM117 3-terminal adjustableregulator.
  • AN-42 IC Provides On-Card Regulation for Logic Circuits (Rev. B)
    PDF, 593 Kb, Revision: B, File published: May 6, 2013
    This application report provides on-card regulation for logic circuits.
  • High-Efficiency Reg has Low Drop-Out Voltage (Rev. B)
    PDF, 60 Kb, Revision: B, File published: Apr 23, 2013
    Conventional regulators have a high drop-out voltage that is a function of the total output current.However with just a regulator chip an external transistor and a few passive components this designforms a high output current regulator with a limited input voltage and high efficiency. The circuit presentedhas a drop-out of 0.7V at 5A load current and 1.3V at a current level of as high as
  • Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems
    PDF, 104 Kb, File published: Oct 3, 2002
  • A New Production Technique for Trimming Voltage Regulators
    PDF, 105 Kb, File published: Oct 3, 2002
  • AB-12 Wide Adjustable Range PNP Voltage Regulator (Rev. B)
    PDF, 47 Kb, Revision: B, File published: May 6, 2013
    This application note discusses the PNP voltage regulator.
  • AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B)
    PDF, 82 Kb, Revision: B, File published: May 5, 2013
    This application report discusses improving power supply reliability with IC power regulators.
  • AN-181 3-Terminal Regulator is Adjustable (Rev. B)
    PDF, 314 Kb, Revision: B, File published: May 5, 2013
    Until now all of the 3-terminal power IC voltage regulators have a fixed output voltage. In spite of this limitation their ease of use low cost and full on-chip overload protection have generated wide acceptance. Now with the introduction of the LM117 it is possible to use a single regulator for any output voltage from 1.2 V to 37 V at 1.5A. Selecting close-tolerance outp
  • AN-1061 Power Conversion in Line-Powered Equipment (Rev. B)
    PDF, 406 Kb, Revision: B, File published: Apr 23, 2013
    This application note describes line-powered equipment and power conversion techniques or methods tosolve those typical power needs.
  • Techniques for accurate PSRR measurements
    PDF, 1.9 Mb, File published: Oct 28, 2013
  • A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes
    PDF, 56 Kb, File published: Jun 15, 2015
  • AN-1950 Silently Powering Low Noise Applications (Rev. A)
    PDF, 10.5 Mb, Revision: A, File published: Apr 22, 2013
    This application report explains how to implement a low noise switch mode power supply solution. Itintroduces the sources of noise and explain how to minimize them. A big factor in noise generation andpropagation is the printed circuit board layout. Important basics are discussed. Circuit measurementtechniques are also explained to guide a design engineer towards a low noise but efficient so
  • LDO Performance Near Dropout
    PDF, 149 Kb, File published: Oct 8, 2010
  • Linear power for automated industrial systems
    PDF, 1.8 Mb, File published: Jan 9, 2015
    Designing a robust power management system for industrial automated equipment requires thorough understanding of the surroundings and conditions that affect the functionality. During the past few decades industrial and factory automation systems have become more robust intelligent and connected which has drastically increased the footprint for semiconductor components. This change has created a
  • AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A)
    PDF, 169 Kb, Revision: A, File published: Apr 25, 2013
    Ultra-low ESR capacitors such as ceramics are highly desirable because they can support fast-changingload transients and also bypass very high frequency noise coming from switching converter powersources which a linear regulator can not reject. However using ultra-low ESR capacitors on the output ofan LDO regulator requires that specific design changes be implemented to ensure loop stabili
  • Linear and Switching Voltage Regulator Fundamental Part 1
    PDF, 183 Kb, File published: Mar 21, 2007
  • AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B)
    PDF, 684 Kb, Revision: B, File published: May 6, 2013
    The purpose of this application report is to aid the user in maximizing the power handling capability of Texas Instruments power packages by using the SOT-223 as an example.
  • Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A)
    PDF, 284 Kb, Revision: A, File published: May 5, 2013
    When working with voltage regulator circuits the designer is often confronted with the need to calculatethe tolerance of the regulated output voltage. For fixed voltage regulators this problem is easily managedbecause the required information is directly supplied on the semiconductor manufacturer's data sheet.
  • Fundamental Theory of PMOS LDO Voltage Regulators
    PDF, 66 Kb, File published: May 7, 1999
    This report presents a fundamental understanding on the theory of low-dropout voltage regulators using a PMOS FET as the pass element to adjust the output current to the load requirements.
  • AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B)
    PDF, 300 Kb, Revision: B, File published: May 6, 2013
    This application note discusses the operation and compensation of linear regulators.
  • A Topical Index of TI LDO Application Notes (Rev. F)
    PDF, 82 Kb, Revision: F, File published: Jun 27, 2019
  • LDO Noise Demystified (Rev. A)
    PDF, 785 Kb, Revision: A, File published: Aug 9, 2017
    Thisapplicationreportexplainsthe differencebetweennoiseand PSRRof an LDO.It also explainsthedifferentwaysnoiseis specifiedin LDOdatasheetsandwhichspecificationshouldbe usedin theapplication.Finallyit explainshow LDOnoiseis reduced.
  • LDO PSRR Measurement Simplified (Rev. A)
    PDF, 131 Kb, Revision: A, File published: Aug 9, 2017
    This applicationreportexplainsdifferentmethodsof measuringthe PowerSupplyRejectionRatio(PSRR)of a Low-Dropout(LDO)regulatorand includesthe prosand consof thesemeasuringmethods

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Manufacturer's Classification

  • Semiconductors > Analog and Mixed-Signal > Power Management > Linear Regulator (LDO) > Single Channel LDO
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