LP2981-33DBVR from Texas Instruments, in a SOT-23-5. 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	VIN	power_in	Supply input. Accepts 2.2 V to 16 V (continuous absolute max 16 V). Should be bypassed with a 1-µF ceramic capacitor (CIN) close to the pin.
2	GND	power_in	Ground return for the regulator. Ground pin current (IGND) is typically 600 µA at 100-mA load.
3	ON/OFF	input	Active-low shutdown pin. Drive high (≥1.6 V over temp) to enable the regulator; drive low (≤0.15 V over temp) to place the device in shutdown (~0.01 µA typical). Must be actively terminated; tie to VIN if unused. Absolute max 16 V; operating range 0 V to VIN.
4	NC	unconnected	No internal connection. Can be left floating or tied to ground.
5	VOUT	power_out	Regulated 3.3-V output, 100-mA continuous capability (short-circuit protected, ~150 mA). Requires a minimum 4.7-µF output capacitor (COUT) for stability.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

LP2981-33DBVR
LP2981-33DBVRDBVT

CAD (KiCad official)

Symbol: LP2981-33DBVR
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lp2981-33dbvr.step`	85 KB	You want the bare part, or you mark your own boards.
`lp2981-33dbvr-etched.step`	2.5 MB	You want the part with `LP2981-33DBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 604 faces against 102 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 (22 pp, sha256 51443d0a50026bd7, 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