component

LM317T-DG

Public Made by Adom

by adom

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs lm317t-dg: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers lm317t-dg: viewers · Ray 1mo ago
lm317t-dg-etched.fit.json lm317t-dg: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm317t-dg-etched.glb lm317t-dg: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm317t-dg-etched.step lm317t-dg: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm317t-dg.glb Publish 0.1.0 · Ray 1mo ago
lm317t-dg.kicad_mod Publish 0.1.0 · Ray 1mo ago
lm317t-dg.kicad_sym Publish 0.1.0 · Ray 1mo ago
lm317t-dg.lbr Publish 0.1.0 · Ray 1mo ago
lm317t-dg.step Publish 0.1.0 · Ray 1mo ago
package.json lm317t-dg: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json lm317t-dg: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
README.md Initial commit: component/lm317t-dg · Ray 1mo ago

LM317T-DG

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

LM317T-DG from STMicroelectronics, in a TO-220. 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 terminal: provides 1.25 V internal reference voltage for external resistor-divider feedback network; typical adjustment pin current 50-100 µA for setting output voltage between 1.2-37 V.
2 OUT power_out Regulated output voltage terminal adjustable from 1.2 to 37 V via external resistor divider; maximum output current 1.5-2.2 A when VI-VO ≤ 40 V and power dissipation ≤ 20 W; minimum load current 3.5-10 mA.
3 IN power_in Unregulated input supply voltage terminal; input-to-output differential voltage VI-VO must not exceed 40 V absolute maximum rating; operating differential range 3-40 V for electrical characteristics.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TO-220
Category Power Management (PMIC)
Pins 3

CAD (KiCad official)

  • Symbol: LM317T-DG
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: lm317t-dg-etched.step / lm317t-dg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm317t-dg.step / lm317t-dg.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (25 pp, sha256 282eaff4ac2fa575, retrieved 2026-09-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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