# LP2950L-3.3V-1

**UTC Unisonic Tech** · Voltage Reference · TO-252

LP2950L-3.3V-1 from UTC Unisonic Tech, in a TO-252. 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 | Unregulated supply input (VIN) to the regulator; absolute maximum supply voltage is -0.3 to +30 V. |
| 2 | GND | power_in | Ground reference for the regulator. |
| 3 | OUTPUT | power_out | Regulated 3.3 V output (VOUT, ±2% accuracy) delivering up to 100 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | TO-252 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | -0.3 |  | 30 | V |  | 6 |
| Feedback Voltage | VFB | -1.5 |  | 30 | V |  | 6 |
| Shutdown Voltage | VSHDN | -0.3 |  | 30 | V |  | 6 |
| Operation Junction Temperature | TJ | -40 |  | 125 | C |  | 6 |
| Storage Temperature | TSTG | -65 |  | 150 | C |  | 6 |
| Line Regulation | ΔVOUT | 0.03 | 0.1 | 0.2 | % | 6V≦VIN≦30V | 6 |
| Load Regulation | ΔVOUT | 0.04 | 0.1 | 0.2 | % | 100μA≦IL≦100 mA | 6 |
| Dropout Voltage | VD | 50 | 80 | 150 | mV | IL=100μA | 6 |
| Dropout Voltage | VD | 380 | 450 | 600 | mV | IL=100mA (Note 2) | 6 |
| Ground Current | IG |  | 120 | 140 | μA | IL=100μA | 6 |
| Ground Current | IG |  | 12 | 14 | mA | IL=100mA | 6 |
| Dropout Ground Current |  |  | 170 | 200 | μA | VIN=(VONOM − 0.5)V, IL=100μA | 6 |
| Current Limit | ILIMIT | 130 | 190 | 250 | mA | VOUT=0 | 6 |
| Output Noise (10Hz ~ 100KHz) | eN |  | 430 |  | μV | CL=1μF | 6 |
| Output Noise (10Hz ~ 100KHz) | eN |  | 160 |  | μV | CL=200μF | 6 |
| Output Noise (10Hz ~ 100KHz) | eN |  | 100 |  | μV | CL=3.3μF | 6 |
| Output Voltage Temperature Coefficient | TCVO |  | 20 | 100 | ppm/C |  | 6 |
| Junction-to-Ambient (TO-252) | θJA |  | 92 |  | C/W | Surface mounted on 2 inch² FR-4 board with 2OZ copper | 6 |
| Junction-to-Case (TO-252) | θJC |  | 6 |  | C/W |  | 6 |

## CAD (KiCad official)

- Symbol: `LP2950L-3.3V-1`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `lp2950l-3-3v-1-etched.step` / `lp2950l-3-3v-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp2950l-3-3v-1.step` / `lp2950l-3-3v-1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UTC Unisonic Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603078364576440320) (8 pp, sha256 `cd2424f2ca1dc3af`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/lp2950l-3-3v-1-datasheet.pdf)