# TP1117-1.8Y3

**TECH PUBLIC** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

TP1117-1.8Y3 from TECH PUBLIC, in a SOT-223. 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 | ADJ/GND | power_in | Ground reference for the fixed 1.8V output version (adjustment pin on the ADJ version, where output is VOUT=1.25V(1+R2/R1)). |
| 2 | OUTPUT | power_out | Regulated 1.8V output (typ 1.80V) delivering up to 1A maximum output current. |
| 3 | INPUT | power_in | Unregulated supply input with a maximum input voltage of 18V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-223 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `TP1117-1.8Y3`
- Footprint: `Package_TO_SOT_SMD:SOT-223-3_TabPin2`
- 3D model: SOT-223 (KiCad packages3D, STEP)
- 3D model files: `tp1117-1-8y3-etched.step` / `tp1117-1-8y3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp1117-1-8y3.step` / `tp1117-1-8y3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/tp1117-1-8y3-datasheet.pdf) (8 pp, sha256 `64dcf6cc6eb56f94`, retrieved 2026-11-04, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/tp1117-1-8y3-datasheet.pdf)