MT3608L from Aerosemi, in a SOT-23-6. 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	Power switch output; drain of the internal 80 mΩ N-channel power MOSFET. Connect the boost inductor and Schottky rectifier here. SW can swing between GND and 22V (absolute max).
2	GND	power_in	Device ground return. Should be tied to a solid ground plane for heat sinking and noise immunity.
3	FB	input	Feedback input to the internal error amplifier. Regulates to VREF = 0.6V (typ). Connect an external R1/R2 resistor divider from VOUT to set the output voltage: VOUT = 0.6V × (1 + R1/R2). Input bias current ≈ -10 nA typ.
4	EN	input	Regulator on/off control input. Drive high (VIH ≥ 1.5V) to enable the converter; low (VIL ≤ 0.6V) to shut it down (IQ ≈ 0.1 µA). Tie to VIN for automatic startup. Absolute max 18V.
5	VIN	power_in	Input supply pin, 2.2V to 16V operating range (18V abs max). Must be locally bypassed with a low-ESR ceramic capacitor (22 µF recommended). Feeds the internal UVLO (2.2V typ) and control circuitry.
6	OC	input	Adjustable over-current programming pin. A resistor from OC to GND (19 kΩ-96 kΩ) sets peak switch current from 2.5A down to 0.5A per IOCP = 48000 / R. Leave floating to use the internal 2.5A default limit. Keep trace short.

Key specifications

Parameter	Value
Manufacturer	Aerosemi
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

MT3608L

CAD (KiCad official)

Symbol: MT3608L
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mt3608l.step`	97 KB	You want the bare part, or you mark your own boards.
`mt3608l-etched.step`	1.7 MB	You want the part with `MT3608L` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 402 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: Aerosemi datasheet (9 pp, sha256 055e347e76e74cba, 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