# LM317LDR2G

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

LM317LDR2G from onsemi, 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 | Regulator input; the input-to-output differential must not exceed the 40 Vdc maximum rating. |
| 2 | Vout | power_out | Regulated output, rated for more than 100 mA with output adjustable from 1.2 V to 37 V; pins 2, 3, 6 and 7 are all printed as Vout. |
| 3 | Vout | power_out | Regulated output, rated for more than 100 mA with output adjustable from 1.2 V to 37 V; pins 2, 3, 6 and 7 are all printed as Vout. |
| 4 | Adjust | input | Adjustment terminal; the 1.25 V typical reference is developed across R1 and the output sets the output voltage through R2, with IAdj kept below 100 µA. |
| 5 | N.C. | unconnected | Not connected (no internal connection specified). |
| 6 | Vout | power_out | Regulated output, rated for more than 100 mA with output adjustable from 1.2 V to 37 V; pins 2, 3, 6 and 7 are all printed as Vout. |
| 7 | Vout | power_out | Regulated output, rated for more than 100 mA with output adjustable from 1.2 V to 37 V; pins 2, 3, 6 and 7 are all printed as Vout. |
| 8 | N.C. | unconnected | Not connected (no internal connection specified). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM317LDR2G`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `lm317ldr2g-etched.step` / `lm317ldr2g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm317ldr2g.step` / `lm317ldr2g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/lm317l-d.pdf) (17 pp, sha256 `412544edc42416f9`, retrieved 2026-10-09, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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](docs/lm317ldr2g-datasheet.pdf)