TMI3411 from TMI, 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 the EN rising threshold (typ 1.1V @ VIN=5V, 0.9V @ VIN=3.3V; hysteresis ~0.1V) to enable the converter; drive below the falling threshold to shut down (shutdown current <1µA). Do not leave floating. Absolute max 6.5V.
2	GND	power_in	Device ground return. Also serves as the source connection for the internal low-side N-channel MOSFET and reference for the internal bias.
3	LX	output	Power switch node output. Connects to the drains of the internal P-channel high-side and N-channel low-side MOSFETs and to the external inductor. RDS(on) typ 180 mΩ (PMOS) / 70 mΩ (NMOS); rated up to 2A output current. Absolute max -0.3 to 6.5V (transient -3.5 to 7.5V for <5ns).
4	VIN	power_in	Power supply input, 2.5V to 6.0V operating range. UVLO ~2.3V, OVP ~6.5V. Bypass with a low-ESR ceramic capacitor (22µF typ) placed as close as possible to the pin. Absolute max 6.5V.
5	FB	input	Output voltage feedback. Connect to the mid-point of the external resistor divider from VOUT to GND; internal reference is 0.600V (typ). VOUT = 0.6 × (1 + R1/R2), adjustable from 0.6V up to near VIN.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TMI3411

CAD (KiCad official)

Symbol: TMI3411
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
`tmi3411.step`	85 KB	You want the bare part, or you mark your own boards.
`tmi3411-etched.step`	1.1 MB	You want the part with `TMI3411` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 306 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: TMI datasheet (13 pp, sha256 250f10783988bd4b, 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