component
LM317MDCYR
Public Made by Adomby adom
Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM317MDCYR
Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
LM317MDCYR from Texas Instruments, in a SOT-223-4. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ADJUST | input | Output feedback voltage input; internally regulates OUTPUT to 1.25V above this pin, and can be bypassed with a capacitor for ripple rejection. |
| 2 | OUTPUT | power_out | Regulated output voltage pin; place the output capacitor (per Recommended Operating Conditions) as close as possible to this pin and the COMMON node. |
| 3 | INPUT | power_in | Input supply voltage, 2.5V to 37V relative to the OUTPUT pin; place the input capacitor (per Recommended Operating Conditions) as close as possible to this pin and the COMMON node. |
| 4 | OUTPUT | power_out | Package tab/lead shown in the pin diagram as OUTPUT (electrically common with pin 2), used for mechanical mounting and heat dissipation on the 4-pin SOT-223 (DCY) package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
CAD (KiCad official)
- Symbol:
LM317MDCYR - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files:
lm317mdcyr-etched.step/lm317mdcyr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317mdcyr.step/lm317mdcyr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (32 pp, sha256
3d54e2356594bb30, retrieved 2026-09-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).