LP3220SAB5F 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	EN	input	Enable pin, active high. Pull high (VEN(H) >= 1.4V) to enable the converter; pull low (VEN(L) <= 0.4V) to force the device into low-power shutdown (<1uA total input current). Input low current 1uA max at VEN=5V.
2	GND	power_in	Device ground. Return for internal control circuitry and the low-side synchronous rectifier MOSFET source. Must be tied to the system ground plane with low-impedance connection.
3	LX	output	Switch node connection to the external inductor. Connects to the drains of the internal main P-channel and synchronous N-channel power MOSFETs. Absolute max 8.0V to GND; keep trace short to minimize EMI.
4	VIN	power_in	Supply input, 2.2V to 5.5V (abs max 8.0V). Powers the internal control circuitry and the high-side P-channel MOSFET drain. Must be closely decoupled to GND with a 10uF or greater ceramic capacitor.
5	FB/Vout	input	Feedback input. On the adjustable LP3220SAB5F variant this pin senses the divided output voltage against the internal 0.6V reference (VOUT = 0.6V x (1 + R1/R2)). On fixed-voltage variants (-12/-18/-33) this pin is tied directly to VOUT for internal feedback.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LP3220SAB5F
LP3220SAB5F-12B5F
LP3220SAB5F-18B5F
LP3220SAB5F-33B5F

CAD (KiCad official)

Symbol: LP3220SAB5F
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
`lp3220sab5f.step`	85 KB	You want the bare part, or you mark your own boards.
`lp3220sab5f-etched.step`	2.3 MB	You want the part with `LP3220SAB5F` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 555 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 (11 pp, sha256 f568f91ecbf3261b, 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