MT3410LB-N from Aerosemi, 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	Chip Enable. Drive above 1.5V (typ threshold 1.0V, max 1.5V) to turn on; drive below 0.3V to shut down (<1µA shutdown current). Do not leave floating. Absolute max -0.3V to 6.5V.
2	GND	power_in	Analog ground pin. Return for input/output capacitors; keep CIN and COUT negative plates close to this pin.
3	SW	output	Power switch output / inductor node. Connects to the drains of the internal P-ch and N-ch MOSFETs (RDS(ON) ~300mΩ each). Connect through the external inductor (1µH-4.7µH typ) to VOUT. Absolute max -0.3V to 6.8V.
4	VIN	power_in	Power supply input, 2.3V to 6V operating range (absolute max 6.5V). Must be decoupled to GND with a 10µF or greater ceramic capacitor placed close to the pin.
5	FB	input	Output voltage feedback pin. Connect to a resistive divider from VOUT to set output voltage: VOUT = 0.6V x (1 + R1/R2). Internal reference is 0.6V typical. Absolute max -0.3V to 6.5V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

MT3410LB-N

CAD (KiCad official)

Symbol: MT3410LB-N
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
`mt3410lb-n.step`	85 KB	You want the bare part, or you mark your own boards.
`mt3410lb-n-etched.step`	1.6 MB	You want the part with `MT3410LB-N` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 407 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: Aerosemi datasheet (8 pp, sha256 91632366e1bc080b, 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