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LM317MDT-MS

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MSKSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lm317mdt-msfactory-2.0.0extractor-text

Verified LM317MDT-MS

by Ray · last 4 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

4 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LM317MDT-MS · TO-252 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 7-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: TO-252-2
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-omn5stqk/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.4)
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lm317mdt-ms.kicad_sym✓ lm317mdt-ms.kicad_mod✓ lm317mdt-ms.step
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

LM317MDT-MS

MSKSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

LM317MDT-MS from MSKSEMI, in a TO-252. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 ADJ input Adjust pin (Vadj) connected to the internal 1.25V reference; adjustable pin current is 46 µA typical and 100 µA maximum.
2 OUT power_out Regulated output, adjustable from 1.2 to 37V and supplying more than 1.5A of load current with internal current limiting and thermal shutdown.
3 IN power_in Unregulated input voltage; the input-output voltage differential must not exceed 40V.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package TO-252
Category Power Management (PMIC)
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input-Output Voltage Differential VI-VO 40 V 3
Lead Temperature TLEAD 230 ℃ 3
Operating Junction Temperature Range TJ 0 125 ℃ 3
Storage Temperature Range Tstg -55 125 ℃ 3
Temperature Coefficient of Output Voltage ΔVO/ΔT -0.02 0.02 %/℃ 3
Line Regulation Rline 0.01 0.04 %/V TA=25℃, 3V≤VI-VO≤40V 3
Line Regulation Rline 0.02 0.07 %/V 3V≤VI-VO≤40V 3
Load Regulation Rload 18 25 mV TA=25℃, 10mA≤IO≤IMAX, VO<5V 3
Load Regulation Rload 0.4 0.5 %VO TA=25℃, 10mA≤IO≤IMAX, VO≥5V 3
Load Regulation Rload 40 70 mV 10mA≤IO≤IMAX, VO<5V 3
Load Regulation Rload 0.8 1.5 %VO 10mA≤IO≤IMAX, VO≥5V 3
Adjustable Pin Current ADJ 46 100 µA 3
Adjustable Pin Current Change ΔlADJ 2 5 3V≤VI-VO≤40V, 10mA≤IO≤IMAX, PD≤PMAX 3
Reference Voltage VREF 1.2 1.25 1.3 V 3V≤VIN-VO≤40V, 10mA≤IO≤IMAX, PD≤PMAX 3
Temperature Stability STT 0.7 %/ VO 3
Minimum Load Current to Maintain Regulation IL(MIN) 3.5 12 mA VI-VO=40V 3
RMS Noise, % of VOUT N 0.003 0.01 %/ VO TA=25℃, 10Hz≤f≤10KHz 3
Long-Term Stability ST 0.3 1 % TJ=THIGH; TA=25℃ for end point mesasurements, 1000 HR 3
Thermal Resistance Junction to Case RθJC 5 ℃/W 3

CAD (KiCad official)

  • Symbol: LM317MDT-MS
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: lm317mdt-ms-etched.step / lm317mdt-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm317mdt-ms.step / lm317mdt-ms.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: MSKSEMI datasheet (7 pp, sha256 bd35eea1daa65338, retrieved 2026-11-04, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (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).

Datasheet PDF