# LM317LM

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8

LM317LM from Texas Instruments, in a SOIC-8. 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 | VIN | power_in | Supply input pin accepting input voltage with maximum 40V differential from output. |
| 2 | VOUT | power_out | Voltage output pin providing regulated output from 1.2V to 37V with 100mA output current capacity. |
| 3 | VOUT | power_out | Voltage output pin providing regulated output from 1.2V to 37V with 100mA output current capacity. |
| 4 | ADJ | input | Output voltage adjustment pin for setting output voltage via resistor divider with adjustment pin current of 50-100 µA. |
| 5 | NC | unconnected | No connection. |
| 6 | VOUT | power_out | Voltage output pin providing regulated output from 1.2V to 37V with 100mA output current capacity. |
| 7 | VOUT | power_out | Voltage output pin providing regulated output from 1.2V to 37V with 100mA output current capacity. |
| 8 | NC | unconnected | No connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM317LM`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `lm317lm-etched.step` / `lm317lm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm317lm.step` / `lm317lm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm317l-n) (42 pp, sha256 `d7eebe2913a65d85`, retrieved 2026-09-27, 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`, 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](docs/lm317lm-datasheet.pdf)