TMI3410 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 1.5V (typ EN rising threshold ~1.15V) to turn the part on; drive below 0.4V (typ EN falling ~1.0V) to shut down. Do not leave floating. EN leakage <= 1.0 uA; absolute max -0.3V to 6.0V.
2	GND	power_in	Device ground reference. Return for the internal low-side NMOS switch and control circuitry.
3	LX	power_out	Power switch (SW) node connecting to the external inductor. Common drain of the internal P-channel high-side (RDS(on) ~120 mOhm) and N-channel low-side (RDS(on) ~70 mOhm) MOSFETs. Peak current limit ~3.2A typ. Abs max -0.3V to 6.0V (transient -3.5V to 7.5V).
4	IN	power_in	Power supply input pin (VIN). Operating range 2.5V to 5.5V; UVLO ~2.35V, input OVP ~5.9V. Bypass locally with a ceramic capacitor (typ 22 uF).
5	FB	input	Output voltage feedback pin. Connect to an external resistor divider from VOUT; internally regulated to VREF = 0.600V (typ, 0.588-0.612V). Abs max -0.3V to 6.0V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TMI3410

CAD (KiCad official)

Symbol: TMI3410
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
`tmi3410.step`	85 KB	You want the bare part, or you mark your own boards.
`tmi3410-etched.step`	1.3 MB	You want the part with `TMI3410` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 335 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 (15 pp, sha256 f73e6bdaf6e6d5f2, 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