# LMS8117AMP-1.8

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

LMS8117AMP-1.8 from Texas Instruments, in a SOT-223-4. 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 | ADJUST or GND | power_in | Ground pin for fixed output versions. |
| 2 | OUTPUT | output | Output voltage (VO) pin for the regulator, 1.8 V at 0 to 1 A load with input 3.2 to 10 V. |
| 3 | INPUT | input | Input voltage (VI) pin for the regulator, requires 3.2 to 10 V for regulation. |
| 4 | OUTPUT | output | Output tab for thermal connection, internally connected to pin 2 output. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `LMS8117AMP-1.8`
- Footprint: `Package_TO_SOT_SMD:SOT-223`
- 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files: `lms8117amp-1-8-etched.step` / `lms8117amp-1-8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lms8117amp-1-8.step` / `lms8117amp-1-8.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/lms8117a) (28 pp, sha256 `7cbdb3f64e47af0f`, retrieved 2026-10-07, tier: lcsc)
- **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/lms8117amp-1-8-datasheet.pdf)