LP2951-33DR from Texas Instruments, in a SOIC-8. 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	OUTPUT	power_out	Regulated voltage output (3.3 V nominal for -33 version, 100 mA rated). Tie to SENSE for local regulation.
2	SENSE	input	Remote-sense input. Connect to OUTPUT (with FEEDBACK tied to VTAP) to output the fixed voltage corresponding to the part version, or route to the load for remote sensing.
3	SHUTDOWN	input	Active-high shutdown input. Drives the regulator into low-current shutdown when asserted. Absolute max range -1.5 to 30 V.
4	GND	power_in	Device ground reference.
5	ERROR	output	Active-low open-collector error flag. Pulls low when VOUT drops more than 6% below its nominal value. Requires an external pull-up.
6	VTAP	output	Internal resistor-divider tap. Tie to FEEDBACK to program the fixed output voltage of the part version (3.3 V for -33).
7	FEEDBACK	input	Regulator feedback input (1.235 V reference internal). Tie to VTAP (with OUTPUT tied to SENSE) for the fixed output voltage, or drive from an external resistor divider to set an adjustable output between 1.235 V and 30 V.
8	INPUT	power_in	Unregulated supply input. Operating range up to 30 V; absolute max -0.3 to 30 V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

LP2951-33DRD
LP2951-33DR
LP2951-33DRP
LP2951-33DRG

CAD (KiCad official)

Symbol: LP2951-33DR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lp2951-33dr.step`	122 KB	You want the bare part, or you mark your own boards.
`lp2951-33dr-etched.step`	2.3 MB	You want the part with `LP2951-33DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 568 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 (35 pp, sha256 5fc61cb191c95614, retrieved 2026-08-17, tier: manufacturer)
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