component

TMI3253

Public Made by Adom

by adom

TMI DC-DC Converters, SOT-23-6. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs tmi3253: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
package.json Publish 0.2.0 · Ray 1mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 1mo ago
page.json Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") · Ray 11d ago
README.md tmi3253: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 17d ago
tmi3253-etched.fit.json tmi3253: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
tmi3253-etched.glb tmi3253: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
tmi3253-etched.step tmi3253: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
tmi3253.glb Publish 0.1.0 · Ray 1mo ago
tmi3253.kicad_mod Publish 0.1.0 · Ray 1mo ago
tmi3253.kicad_sym Publish 0.1.0 · Ray 1mo ago
tmi3253.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect and oval pad as a SQUARE EAGLE smd; this carries the real pad shape across (0 -> 6 rounded pads) and stops dropping geometry drawn on KiCad User.N layers. Attributes, connects, pads and the pin-1 marker are gated against decreasing and are unchanged. · Ray 1mo ago
tmi3253.step Publish 0.1.0 · Ray 1mo ago

TMI3253

TMI · DC-DC Converters · SOT-23-6

TMI3253 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 GND power_in Ground pin. Return for all internal circuitry and the low-side MOSFET source. Connect to the system ground plane with a low-impedance path.
2 LX output Switching node. Common connection of the internal high-side and low-side power MOSFETs; connects to the external inductor. Absolute maximum -0.3V to 20V (steady) / -4.5V to 22V (<10ns transient).
3 IN power_in Power supply input. 4.5V to 18V operating range (20V abs max). Bypass to GND with a low-ESR ceramic capacitor (22µF typical) placed close to the pin.
4 FB input Output voltage feedback input. Connect to the center tap of the external resistor divider between VOUT and GND. Regulated to VREF = 0.8V (TMI3253), 0.6V (TMI3253S), or 0.765V (TMI3253T).
5 EN input Enable input. Drive logic-high (>0.95V typ threshold) to enable the IC; drive logic-low to disable and enter micro-power shutdown (~5µA). Do NOT leave floating.
6 BS passive Bootstrap. A capacitor (typ 0.1µF) between LX and BS forms a floating supply that powers the high-side N-MOSFET gate driver. Absolute maximum 26V to GND, 6V BS-to-LX.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • TMI3253
  • TMI3253T
  • TMI3253S

CAD (KiCad official)

  • Symbol: TMI3253
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: tmi3253-etched.step / tmi3253-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmi3253.step / tmi3253.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
tmi3253.step 97 KB You want the bare part, or you mark your own boards.
tmi3253-etched.step 1.6 MB You want the part with TMI3253 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 387 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 (16 pp, sha256 b58c2a4a18985f81, 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