# TP181C33S5-1

**TECH PUBLIC** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

TP181C33S5-1 from TECH PUBLIC, in a SOT-23-5. 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 | Power supply input; the datasheet gives an absolute maximum of -0.3 to +20 V and a maximum operating input voltage of 18 V. |
| 2 | GND | power_in | Ground terminal. |
| 3 | CE | input | Chip enable input; VCEH is at least 1.3 V (enabled) and VCEL is at most 0.7 V (disabled), with an absolute maximum of GND-0.3 to VIN+0.3 V. |
| 4 | NC | unconnected | No connection. |
| 5 | VOUT | power_out | Regulated output; the 3.3 V option (TP181C33) has an output of 3.234 to 3.366 V and a maximum output current of 300 mA typical, with an absolute maximum of GND-0.3 to 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `TP181C33S5-1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tp181c33s5-1-etched.step` / `tp181c33s5-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp181c33s5-1.step` / `tp181c33s5-1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/tp181c33s5-1-datasheet.pdf) (9 pp, sha256 `72797d93de93372e`, retrieved 2026-10-27, 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/tp181c33s5-1-datasheet.pdf)