LP2951ACMMX from Texas Instruments, in a VSSOP-8-0.65mm. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	OUT	power_out	Regulated output voltage. Delivers up to 100 mA; programmable from 1.24 V to 29 V by external divider (or pin-strapped to 3 V, 3.3 V, or 5 V by tying FEEDBACK to VTAP). Requires an output capacitor for stability.
2	SENSE	input	Output voltage sense input for the internal reference divider. Normally tied directly to OUT (or to the load Kelvin point) so the regulator senses the actual load voltage.
3	SHUTDOWN	input	Logic-level shutdown input. Drive high to disable the regulator (output off) or low to enable normal operation. Referenced to GND, tolerates up to 30 V.
4	GROUND	power_in	Device ground reference. Return for input supply, output capacitor, and internal reference.
5	ERROR	output	Open-collector active-low error flag. Pulls low when the regulated output falls approximately 5% below its nominal value (dropout, over-current, thermal shutdown, or low VIN); typically used for power-on reset or brown-out indication. Requires an external pull-up resistor.
6	VTAP	output	Tap of the internal precision resistor divider used to set the fixed 5 V / 3.3 V / 3 V output. Tie to FEEDBACK for the preset factory output; leave open when programming a custom output with an external divider.
7	FEEDBACK	input	Voltage feedback input to the error amplifier (internal reference ≈ 1.235 V). Tie to VTAP for the preset output, or drive from an external R1/R2 divider from OUT to GND to program VOUT from 1.24 V to 29 V.
8	IN	power_in	Unregulated input supply. Operates from 2.3 V to 30 V; requires a small input decoupling capacitor (typ. 1 µF).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VSSOP-8-0.65mm
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

LP2951ACMMXDGK
LP2951ACMMXDGKR
LP2951ACMMX
LP2951ACMMXD
LP2951ACMMXM
LP2951ACMMXP
LP2951ACMMXN
LP2951ACMMXNGT

CAD (KiCad official)

Symbol: LP2951ACMMX
Footprint: Package_SO:VSSOP-8_2.3x2mm_P0.5mm
3D model: VSSOP-8-0.65mm (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lp2951acmmx.step`	122 KB	You want the bare part, or you mark your own boards.
`lp2951acmmx-etched.step`	2.0 MB	You want the part with `LP2951ACMMX` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 503 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Texas Instruments datasheet (61 pp, sha256 4478ca091af597ac, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF