LP3992-33B5F from LOWPOWER, 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	Power input voltage. Recommended operating range 2.5V to 5.5V (absolute max 6.5V). Requires a >=1µF input capacitor placed within 0.5 inch of the pin.
2	GND	power_in	Device ground return. Return input and output capacitors to a clean analog ground.
3	EN	input	Chip enable (active high, TTL logic). VIH >= 1.4V enables the regulator; VIL <= 0.4V places the device in shutdown (<0.01µA typical). May be tied to VIN for always-on operation. Absolute max EN voltage is VIN+0.3V.
4	NC	unconnected	No internal connection. May be left floating.
5	VOUT	power_out	Regulated 3.3V output (±3% accuracy at 1mA). Delivers up to 300mA with 220mV typical dropout at 300mA. Requires a >=1µF ceramic output capacitor (ESR >25mΩ acceptable) placed within 0.5 inch of the pin.

Key specifications

Parameter	Value
Manufacturer	LOWPOWER
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

LP3992-33B5F
LP3992-33B5FJ5F
LP3992-33B5FB3F

CAD (KiCad official)

Symbol: LP3992-33B5F
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
`lp3992-33b5f.step`	85 KB	You want the bare part, or you mark your own boards.
`lp3992-33b5f-etched.step`	2.6 MB	You want the part with `LP3992-33B5F` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 610 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: LOWPOWER datasheet (9 pp, sha256 c4874862660fdd11, 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