component

LM317EMPX

Public Made by Adom

by 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.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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docs lm317empx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
viewers lm317empx: viewers · Ray 1mo ago
lm317empx-etched.fit.json lm317empx: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm317empx-etched.glb lm317empx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
lm317empx-etched.step lm317empx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
lm317empx.glb Publish 0.1.0 · Ray 1mo ago
lm317empx.kicad_mod Publish 0.1.0 · Ray 1mo ago
lm317empx.kicad_sym Publish 0.1.0 · Ray 1mo ago
lm317empx.lbr Publish 0.1.0 · Ray 1mo ago
lm317empx.step Publish 0.1.0 · Ray 1mo ago
package.json lm317empx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
page.json lm317empx: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 24d ago
README.md Initial commit: component/lm317empx · Ray 1mo ago

LM317EMPX

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

LM317EMPX 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 ADJ input Adjustment pin; adjustment current 50-100 μA over operating range controls output voltage via external resistive feedback network.
2 VOUT output Output voltage pin; maximum output current 1.5-3.4 A at (VIN-VOUT) ≤ 15 V.
3 VIN power_in Input voltage pin; (VIN-VOUT) voltage differential must be 3-40 V for regulated operation.
4 VOUT output Output voltage thermal pad; maximum output current 1.5-3.4 A at (VIN-VOUT) ≤ 15 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-223-4
Category Power Management (PMIC)
Pins 4

CAD (KiCad official)

  • Symbol: LM317EMPX
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: lm317empx-etched.step / lm317empx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm317empx.step / lm317empx.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (58 pp, sha256 5d6f181fd09b90b9, retrieved 2026-09-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF