component

STI3508

Public Made by Adom

by adom

TMI DC-DC Converters, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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PCB Footprint

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Datasheet

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Contents

README

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STI3508

TMI · DC-DC Converters · SOT-23-6

STI3508 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 LX power_out Power switch node. Drain of the internal 80mΩ N-MOSFET switch (3A current limit, 30V absolute max). Connect the boost inductor and the anode of the Schottky rectifier at this node. High dV/dt node - keep the trace short and compact.
2 GND power_in Device ground. Return for the internal power switch and control circuitry. Tie to a strong ground plane for heat sinking and noise protection.
3 FB input Feedback input to the internal error amplifier. Regulated to VFB = 0.6V (typ, 0.588-0.612V). Set VOUT with an external divider: VOUT = 0.6V × (1 + R1/R2). Absolute max 6V.
4 EN input Regulator on/off control. VIH ≥ 1.5V enables the converter; VIL ≤ 0.4V shuts it down (IQ ≈ 0.1µA). Tie to IN for automatic startup when not used. Absolute max 24V - EN may be driven higher than VIN.
5 IN power_in Input supply, 2.5V to 7V operating (8V absolute max). Must be locally bypassed with a low-ESR ceramic capacitor (22µF X5R/X7R recommended) placed close to the pin. UVLO rises at ~2.4V with 200mV hysteresis.
6 NC unconnected No internal connection. Leave floating or tie to GND for routing convenience.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • STI3508

CAD (KiCad official)

  • Symbol: STI3508
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: sti3508-etched.step / sti3508-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sti3508.step / sti3508.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
sti3508.step 97 KB You want the bare part, or you mark your own boards.
sti3508-etched.step 1.8 MB You want the part with STI3508 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 427 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 (10 pp, sha256 4db33eed5c6ff9d3, 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