# LM317LCPWR

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

LM317LCPWR from Texas Instruments, in a TSSOP-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 | INPUT | power_in | Input power supply voltage, requires minimum 2.5 V above output voltage for regulation operation |
| 2 | NC | unconnected | No internal connection; recommend grounding for improved thermal performance but not required |
| 3 | NC | unconnected | No internal connection; recommend grounding for improved thermal performance but not required |
| 4 | ADJUSTMENT | input | Output feedback voltage input with 1.256 V nominal reference voltage for output voltage regulation |
| 5 | NC | unconnected | No internal connection; recommend grounding for improved thermal performance but not required |
| 6 | OUTPUT | power_out | Regulated output voltage capable of supplying 2.5 to 100 mA continuous output current |
| 7 | NC | unconnected | No internal connection; recommend grounding for improved thermal performance but not required |
| 8 | NC | unconnected | No internal connection; recommend grounding for improved thermal performance but not required |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM317LCPWR`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `lm317lcpwr-etched.step` / `lm317lcpwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm317lcpwr.step` / `lm317lcpwr.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) (39 pp, sha256 `d5c5d34eb4738e79`, retrieved 2026-10-03, 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 0.3`, primary `claude-haiku-4-5-20251001` (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/lm317lcpwr-datasheet.pdf)