Datasheet Texas Instruments LM317DCY
| Manufacturer | Texas Instruments |
| Series | LM317 |
| Part Number | 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
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Prices
Status
| Lifecycle Status | Active (Recommended for new designs) |
| Manufacture's Sample Availability | No |
Packaging
| Pin | 4 |
| Package Type | DCY |
| Industry STD Term | SOT-223 |
| JEDEC Code | R-PDSO-G |
| Package QTY | 80 |
| Carrier | TUBE |
| Device Marking | L3 |
| Width (mm) | 3.5 |
| Length (mm) | 6.5 |
| Thickness (mm) | 1.6 |
| Pitch (mm) | 2.3 |
| Max Height (mm) | 1.8 |
| Mechanical Data | Download |
Parametrics
| Accuracy | 5 % |
| Features | N/A |
| Iout(Max) | 1.5 A |
| Iq(Typ) | 3.5 mA |
| Noise | 38 uVrms |
| Operating Temperature Range | 0 to 125 C |
| Output Capacitor Type | Non-Ceramic |
| Output Options | Adjustable Output |
| PSRR @ 100KHz | 38 dB |
| Package Group | SOT-223 |
| Package Size: mm2:W x L | 4SOT-223: 46 mm2: 7 x 6.5(SOT-223) PKG |
| Rating | Catalog |
| Regulated Outputs | 1 |
| Thermal Resistance ОёJA | 24 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
| RoHS | Compliant |
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 RegulatorsPDF, 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 SystemsPDF, 104 Kb, File published: Oct 3, 2002
- A New Production Technique for Trimming Voltage RegulatorsPDF, 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 measurementsPDF, 1.9 Mb, File published: Oct 28, 2013
- A Topical Index of TI Supply Voltage Supervisor (SVS) Application NotesPDF, 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 DropoutPDF, 149 Kb, File published: Oct 8, 2010
- Linear power for automated industrial systemsPDF, 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 1PDF, 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 RegulatorsPDF, 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
Model Line
Series: LM317 (12)
Manufacturer's Classification
- Semiconductors > Analog and Mixed-Signal > Power Management > Linear Regulator (LDO) > Single Channel LDO
