# LP2951CM-3.3

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

LP2951CM-3.3 from Texas Instruments, in a SOIC-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 | OUT | power_out | Regulated output voltage of the device, 3.3 V nominal for this version (±0.5% or ±1%). |
| 2 | SENSE | input | Output voltage sense input, which the 8-pin electrical test conditions specify as tied to OUTPUT. |
| 3 | SHUTDOWN | input | Logic-controlled shutdown input that disables the device, with absolute maximum input voltage of -0.3 V to 30 V and electrical characteristics specified at VSHUTDOWN ≤ 0.8 V. |
| 4 | GND | power_in | Ground reference pin for the regulator. |
| 5 | ERROR | output | Error flag output that warns of low output voltage (output dropout), with absolute maximum output voltage of -0.3 V to 30 V. |
| 6 | VTAP | output | Internal resistor divider tap, which the 8-pin test conditions specify is tied to FEEDBACK. |
| 7 | FEEDBACK | input | Voltage feedback input used to program the output from 1.24 V to 29 V, with absolute maximum input voltage of -1.5 V to 30 V. |
| 8 | IN | power_in | Input supply voltage, with an operating range of 2.3 V to 30 V and a maximum of 30 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LP2951CM-3.3`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `lp2951cm-3-3-etched.step` / `lp2951cm-3-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp2951cm-3-3.step` / `lp2951cm-3-3.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/lp2951-n) (62 pp, sha256 `b9e1f8851a20b9c9`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/lp2951cm-3-3-datasheet.pdf)