component
LM317T-DG
Public Made by Adomby adom
STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownLM317T-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm317t-dg.step/lm317t-dg.glbare 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).