LN2220PAR from NATLINEAR, in a SOT-23-6L. 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	SW	power_out	Switching node. Drain of the internal power switch (up to 4A, RDS(on) ~80mΩ). Connects to the boost inductor and Schottky rectifier; absolute max 28V. Route with short, wide traces and isolate from sensitive signals due to high-frequency switching content.
2	GND	power_in	Device ground return. Connect directly to the system ground plane close to the input and output capacitor return terminals for a low-impedance return path.
3	FB	input	Feedback input to the internal error amplifier. Regulated to VFB = 0.6V (588-612mV). Set output voltage with a resistor divider: VOUT = VFB × (1 + R1/R2). R1 in the hundreds of kΩ is recommended.
4	EN	input	Chip enable, active-high. Drive above VENH (≥1.2V @ VIN=3.6V) to enable the regulator; drive below VENL (≤0.4V) to shut the device down (shutdown current ~0.01µA typ). Do not leave floating.
5	VIN	power_in	Supply input, 2V to 24V operating range (abs max Vss+24V). Bypass with ≥22µF close to the pin. UVLO trips near 2V (falling threshold min 1.7V) with ~100mV hysteresis.
6	NC	unconnected	No internal connection. Leave floating or tie to ground per PCB layout preference.

Key specifications

Parameter	Value
Manufacturer	NATLINEAR
Package	SOT-23-6L
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

LN2220PAMR
LN2220PAML

CAD (KiCad official)

Symbol: LN2220PAR
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ln2220par.step`	97 KB	You want the bare part, or you mark your own boards.
`ln2220par-etched.step`	1.7 MB	You want the part with `LN2220PAR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 431 faces against 117 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: NATLINEAR datasheet (6 pp, sha256 0a94cbd2c8a08b3f, 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