MT3608 from Aerosemi, in a SOT-23-6. Pinout and pin descriptions extracted from the 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. Node can swing between GND and 28 V; keep the SW trace short to minimize EMI.
2	GND	power_in	Device ground and power return for the internal MOSFET. Tie to a solid ground plane for heat sinking and noise immunity.
3	FB	input	Feedback input to the internal error amplifier. Regulates to VFB = 0.6 V (typ., 0.588-0.612 V). Connect an external R1/R2 divider from VOUT so that VOUT = 0.6 V × (1 + R1/R2). Input bias current is roughly −10 nA (−50 nA max) at VFB = 0.6 V.
4	EN	input	Regulator on/off control input. Logic high (VIH ≥ 1.5 V) enables the converter; logic low (VIL ≤ 0.4 V) shuts it down (IQ ≈ 0.1 µA). Absolute max 26 V; tie to VIN for always-on operation.
5	VIN	power_in	Input supply pin, 2 V to 24 V operating range (UVLO ~1.98 V with 100 mV hysteresis). Must be locally bypassed with a low-ESR ceramic capacitor (22 µF X5R/X7R recommended) placed close to the pin.
6	NC	unconnected	No internal connection. May be left floating or tied to GND for improved mechanical/thermal grounding on the PCB.

Key specifications

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

CAD (KiCad official)

Symbol: MT3608
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
`mt3608.step`	97 KB	You want the bare part, or you mark your own boards.
`mt3608-etched.step`	1.6 MB	You want the part with `MT3608` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 385 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 (8 pp, sha256 b2b6d816a2a71dd4, 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