LP2981A-50DBVR 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. Recommended operating range 2.2 V to 16 V (absolute max 16 V). A ≥1 µF input capacitor is recommended.
2	GND	power_in	Device ground reference. Ground pin current is typically 200 µA at 25 mA load and 600 µA at 100 mA load.
3	ON/OFF	input	Active-low shutdown control input. Drive high (>1.6 V) to enable the regulator; drive low (<0.15 V) to shut down (IQ ≈ 0.01 µA). Must be actively terminated; tie to VIN if unused. Absolute max 16 V.
4	NC	unconnected	No connect. Leave floating or tie to ground; no internal connection.
5	VOUT	power_out	Regulated 5.0-V output, 100 mA continuous (short-circuit protected, ~150 mA current limit). Requires a 4.7 µF output capacitor 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.

LP2981A-50DBVR
LP2981A-50DBVRDBVT

CAD (KiCad official)

Symbol: LP2981A-50DBVR
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
`lp2981a-50dbvr.step`	85 KB	You want the bare part, or you mark your own boards.
`lp2981a-50dbvr-etched.step`	2.5 MB	You want the part with `LP2981A-50DBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 605 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 (23 pp, sha256 ad245dedca86e10b, 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