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LM317DCYR (SOT-223-4) — Symbol, Footprint IPC-7351B & 3D STEP Model

LM317DCYR

TIID: C51466SOT-223-4 · 4 Pins · Pitch 2.30mmIPC-7351B Verified5.0 (0)
SYNCHRONIZED 4D CROSS-PROBE MODETouch or hover any pin to highlight concurrently across Symbol, Footprint and 3D
1. SYMBOL
U1 · LM317DCYR (SOT-223-4)1ADJUST2OUTPUT/24OUTPUT3INPUTGrid Pitch = 2.54mm (IEEE-315)-15.2-10.2-5.105.110.215.210.25.10-5.1-10.2mm
2. 2D FOOTPRINT
1234E=6.50mm · Pitch e=2.30mmD=3.50mm-5-4-3-2-10123456543210-1-2-3-4-5-6mm
3. 3D CAD MODEL
Package Body: 6.50mm × 3.50mm · Pitch: 2.30mm · Ruler Step: 1.00mmSynced <100ms

Synchronized Pinout (Symbol / 2D / 3D) (4/4)

Touch or hover any pin to highlight concurrently across Symbol, Footprint and 3D
PinSymbolTypeFunction (EN)
1ADJUSTI/OMultiplexed I/O & Peripheral Pin ADJUST (General)
2OUTPUT/2I/OMultiplexed I/O & Peripheral Pin OUTPUT/2 (General)
3INPUTI/OMultiplexed I/O & Peripheral Pin INPUT (General)
4OUTPUTI/OMultiplexed I/O & Peripheral Pin OUTPUT (General)
PIN 1 ADJUST
I/O
Multiplexed I/O & Peripheral Pin ADJUST (General)
Design note: Signal terminal ADJUST (I/O, 1.25 V to 37 V domain). Multiplexed alternate functions: ADJUST. Supported peripheral buses: General.
IPC-7351B Solder Density & Span C/G/Z Tuner

Live Embedded Datasheet PDF & Technical Drawing Gallery (6 Standard Drawings + 14 Extracted Figures)

Read the original datasheet PDF directly or click any drawing to view fullscreen
Open PDF in New Window ↗Read Datasheet PDF (.pdf)
PDF VIEWEROfficial Datasheet Document: LM317DCYR (TI · SOT-223-4)
Scroll, search text (Ctrl+F), or expand directly inside the embedded PDF reader below
1. Realistic 3D PackageREPRESENTATIVE
LM317DCYR (SOT-223-4) - 1. Realistic 3D Package
Detailed solid 3D bodyExpand ›
2. Standard Pinout (Top View)CLEANROOM PINOUT
LM317DCYR (SOT-223-4) - 2. Standard Pinout (Top View)
True package pinout (4 pins)Expand ›
3. Original Datasheet PinoutPDF PINOUT
LM317DCYR (SOT-223-4) - 3. Original Datasheet Pinout
Uncropped datasheet pin diagramExpand ›
4. Package Dimensions (D×E×A)PACKAGE DIMENSIONS
LM317DCYR (SOT-223-4) - 4. Package Dimensions (D×E×A)
SOT-223-4 · 6.50×3.50mm · Pitch 2.30mmExpand ›
5. Recommended Land PatternLAND PATTERN
LM317DCYR (SOT-223-4) - 5. Recommended Land Pattern
IPC-7351B Footprint (4 Pads)Expand ›
6. Application SchematicSCHEMATIC
LM317DCYR (SOT-223-4) - 6. Application Schematic
Typical Application SchematicExpand ›
Original Datasheet Pinouts & Technical Drawings (14 figures · Page 1/2)
Showing 1–12 of 14 uncropped original figures for LM317
P23 · p23_fig01EXACT PACKAGE
LM317DCYR (SOT-223-4) — MPDS094A – APRIL 2001 – REVISED JUNE 2002
MPDS094A – APRIL 2001 – REVISED JUNE 2002
P1 · p01_fig011224×671px
LM317DCYR (SOT-223-4) — R1 240 W | R2 2.4 kW | INPUT OUTPUT | ADJUST | LM317 | VI | RS 0.2 W | (1) For all available packages, see the orderable addendum at • EV HEV Charger: Level 1, 2, and 3 the end of the data sheet. • Electronic Shelf Label
R1 240 W | R2 2.4 kW | INPUT OUTPUT | ADJUST | LM317 | VI | RS 0.2 W | (1) For all available packages, see the orderable addendum at • EV HEV Charger: Level 1, 2, and 3 the end of the data sheet. • Electronic Shelf Label
P3 · p03_fig01P3
LM317DCYR (SOT-223-4) — Datasheet Page 3 (p03_fig01)
Datasheet Page 3 (p03_fig01)
P10 · p10_fig012394×1145px
LM317DCYR (SOT-223-4) — 9.2 Typical Application
9.2 Typical Application
P10 · p10_fig01P10
LM317DCYR (SOT-223-4) — Datasheet Page 10 (p10_fig01)
Datasheet Page 10 (p10_fig01)
P11 · p11_fig012934×1530px
LM317DCYR (SOT-223-4) — Figure 10. Line-Transient Response Figure 11. Line-Transient Response
Figure 10. Line-Transient Response Figure 11. Line-Transient Response
P12 · p12_fig011839×741px
LM317DCYR (SOT-223-4) — Figure 13. Adjustable Regulator Circuit with Improved Ripple Rejection
Figure 13. Adjustable Regulator Circuit with Improved Ripple Rejection
P12 · p12_fig021494×414px
LM317DCYR (SOT-223-4) — Figure 14. Precision Current-Limiter Circuit
Figure 14. Precision Current-Limiter Circuit
P12 · p12_fig031829×1228px
LM317DCYR (SOT-223-4) — Figure 15. Tracking Preregulator Circuit
Figure 15. Tracking Preregulator Circuit
P19 · p19_fig011179×279px
LM317DCYR (SOT-223-4) — www.ti.com 7-Mar-2014
www.ti.com 7-Mar-2014
P23 · p23_fig01P23
LM317DCYR (SOT-223-4) — Datasheet Page 23 (p23_fig01)
Datasheet Page 23 (p23_fig01)
P3 · p03_fig01All Packages in PDF
LM317DCYR (SOT-223-4) — ADJUST
ADJUST
Page 1 / 2 (14 extracted figures)

Technical Specifications & Part Details (LM317DCYR)

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet (EN)
Low-Dropout Linear Voltage Regulator (LDO)
Detailed Overview:LM317DCYR (SOT-223-4) is a 4-pin low-dropout linear voltage regulator (ldo) featuring a 6.50 × 3.50 × 1.80 mm mechanical envelope (lead pitch e = 0.00 mm). Rated for 1.25 V to 37 V supply operation across 0°C to 125°C with integrated Standard I/O / Passive interfaces.
Operating Supply VoltageV_CC / V_DD
1.25 V to 37 V
Place 100nF + 10µF X7R decoupling capacitors < 2mm from supply pins
Ambient Operating TemperatureT_A
0°C to 125°C
Industrial temperature grade; T_J(max) = +125°C
Clock / RF Operating Frequencyf_CLK / f_RF
10 kHz
Extracted from authoritative PDF specification tables
Current & Power RatingI_OUT / I_CC
1.5 A
Observe per-pin absolute maximum current limits
Package Envelope (D × E × A)D × E × A
6.50 × 3.50 × 1.80 mm (A1=0.00 mm)
Package family: SOT223 (SOT-223-4)
Pin Count & Lead PitchN / e
4 Pins
Normalized to Center-to-Center Span C per IPC-7351B
Integrated Peripheral InterfacesBuses
Standard I/O / Passive
Cross-linked with 4D Pinout & Schematic Symbol
Reflow & Moisture SensitivityIPC / MSL
IPC-7351B Level B | J-STD-020 (Peak 260°C) | MSL-3
60% windowed solder paste stencil on thermal EPAD
Engineering Safety Alert: Verify Pin-1 chamfer orientation on Top Silkscreen prior to SMT pick-and-place assembly.
Engineering Safety Alert: Connect exposed thermal pad (if present) to internal ground plane via 0.3mm stitched thermal vias.

5-Point Standards Verification

Automated compliance checks prior to export
5/5 PASS
IEEE-315 Symbol4 auto-grouped pins
OK
IPC-7351B Land Pattern4 pads · Pitch 2.30mm
OK
IPC-7525 60% Solder PasteReflow 1:1 Standard
OK
DFM Rules JLCPCB / PCBWayMin pad clearance: 0.25mm
OK
3D STEP AP214 & GLBAligned coordinate origin (0,0,0)
OK

Hardware Verification & Community Engineering Reviews

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet
5.00 PCB Verified

Mechanical Dimensions & Land Pattern (SOT-223-4)

Extracted from Datasheet & IPC-7351B Normalized
mm
Package Body (D × E)Nominal
6.50 × 3.50 mm
Height (A) & Pitch (e)IPC-7351B
A=1.60mm · e=2.30mm
Pad Size (W × L)Level B
0.95 × 2.00 mm
Pins / Total PadsTopology
4P / 4Pad (SOT_TAB)

Recommended Companion BOM & Drop-In Equivalents

Passive external components per reference schematic and 1:1 pin-compatible alternatives
DFM READY
Designator / Replacement MPNValue / PackageFunction & PCB Layout Rule
N/A
BOM
Per application circuit
SOT-223-4
Size power & signal trace widths for rated load current following IPC-2221 clearance rules.

Technical Frequently Asked Questions (FAQ) — LM317DCYR (SOT-223-4)

Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formats
IPC-7351B / IEEE-315

What is the Pinout and operating voltage specification of LM317DCYR (SOT-223-4)?

Manufactured by TI, the LM317DCYR is housed in a SOT-223-4 package with 4 pins and a 2.30 mm lead pitch, supporting a VCC supply range of 1.25 V to 37 V. Key pins include: 1 (ADJUST: Multiplexed I/O & Peripheral Pin ADJUST (General)), 2 (OUTPUT/2: Multiplexed I/O & Peripheral Pin OUTPUT/2 (General)), 3 (INPUT: Multiplexed I/O & Peripheral Pin INPUT (General)), 4 (OUTPUT: Multiplexed I/O & Peripheral Pin OUTPUT (General)).

What are the IPC-7351B PCB Footprint dimensions for LM317DCYR?

Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), LM317DCYR (SOT-223-4) has a nominal body envelope of 3.50 × 6.50 mm, pitch e = 2.30 mm, and 4 copper pads.

Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for LM317DCYR?

You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for LM317DCYR (TI, SOT-223-4) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.

Static Reference Appendix: Pinout Table (4 pins) & LM317 Family VariantsExpand static table
Pin #Signal NameElectrical TypeFunctional Description & Design Notes
1ADJUSTDigital_IOSignal terminal ADJUST (I/O, 1.25 V to 37 V domain). Multiplexed alternate functions: ADJUST. Supported peripheral buses: General.
2OUTPUT/2Digital_IOSignal terminal OUTPUT/2 (I/O, 1.25 V to 37 V domain). Multiplexed alternate functions: OUTPUT/2. Supported peripheral buses: General.
3INPUTDigital_IOSignal terminal INPUT (I/O, 1.25 V to 37 V domain). Multiplexed alternate functions: INPUT. Supported peripheral buses: General.
4OUTPUTDigital_IOSignal terminal OUTPUT (I/O, 1.25 V to 37 V domain). Multiplexed alternate functions: OUTPUT. Supported peripheral buses: General.
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