# LP2951CMMX-3.3

**Texas Instruments** · Linear Voltage Regulators (LDO) · VSSOP-8-0.65mm

LP2951CMMX-3.3 from Texas Instruments, in a VSSOP-8-0.65mm. 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 | output | Regulated output voltage; provides 3.3 V nominal output to the load. |
| 2 | SENSE | input | Output voltage sense input; connected to VOUT to provide feedback path for regulation. |
| 3 | SHUTDOWN | input | Logic-compatible shutdown input; disables device when driven low, quiescent current drops to 150 µA. |
| 4 | GND | power_in | Ground reference; device ground connection and substrate connection point. |
| 5 | ERROR | output | Error flag output; open-drain output that signals when output voltage falls below regulation set point. |
| 6 | VTAP | output | Internal resistor divider output; internal 1.235 V reference for feedback network. |
| 7 | FEEDBACK | input | Voltage feedback input; connected to external resistor divider to program output voltage from 1.24 V to 29 V. |
| 8 | IN | power_in | Input supply voltage; accepts 2.3 V to 30 V input with low dropout operation at typical 40 mV. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8-0.65mm |
| Category | Power Supply Chip |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LP2951CMMX-3.3`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)
- 3D model files: `lp2951cmmx-3-3-etched.step` / `lp2951cmmx-3-3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp2951cmmx-3-3.step` / `lp2951cmmx-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 2026-10-05, 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/lp2951cmmx-3-3-datasheet.pdf)