TMI3359 from TMI, 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	BS	passive	Bootstrap pin. A capacitor (typ. 0.1µF) connected between LX and BS pins is required to form a floating supply for the high-side switch gate driver.
2	GND	power_in	Ground pin. Common return for the input supply and internal circuitry.
3	FB	input	Output voltage feedback input. Connect FB to the center point of the external resistor divider. Regulated feedback voltage VREF = 0.8V (±2%).
4	EN	input	Enable input. Drive to logic-high (typ. rising threshold 1.1V) to enable the IC. Drive to logic-low to disable the IC and enter micro-power shutdown mode. Do not float EN. Absolute max VEN = VIN.
5	IN	power_in	Power supply input pin. Operating range 4.5V to 30V; absolute max 33V. Bypass with low-ESR ceramic capacitor(s) close to the pin.
6	LX	output	Switching node. Connects to the internal high-side and low-side MOSFET midpoint; drives the external inductor. Also forms the low reference for the BS bootstrap capacitor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TMI3359

CAD (KiCad official)

Symbol: TMI3359
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
`tmi3359.step`	97 KB	You want the bare part, or you mark your own boards.
`tmi3359-etched.step`	1.6 MB	You want the part with `TMI3359` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 398 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: TMI datasheet (12 pp, sha256 a919a46953f0e7c2, 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