component

TMI3359

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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TMI3359

TMI · DC-DC Converters · SOT-23-6

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage Range IN 4.5 30 V 4
Voltage Range IN IN 4.5 30 V 3
TJ Operating Junction Temperature TJ -40 125 °C 3
Input Supply Voltage -0.3 33 V 2
Enable pin, EN EN -0.3 V 2
LX Voltages LX -0.3 33 V 2
LX Voltages (<10ns transient) LX -3 35 V <10ns transient 2
FB Voltage FB -0.3 6 V 2
BS to LX Voltage -0.3 6 V 2
Storage Temperature Range -65 150 °C 2
Junction Temperature TJ 150 °C Note 2 2
Power Dissipation PD 1000 mW 2
Lead Temperature (Soldering, 10s) 260 °C Soldering, 10s 2
Regulated Feedback Voltage VFB 0.784 0.8 0.816 V TA=25°C 4
FB Input Leakage Current -0.5 0.5 μA 4
Oscillation Frequency 1.2 1.5 1.8 MHz 4
Soft Start Time 0.5 0.7 1 ms 4
EN Rising Threshold 0.85 1.1 1.3 V 4
EN Input Leakage Current -1 1 μA VEN=2V 4
Junction-to-ambient thermal resistance θJA 120 °C/W Note 3: Measured on JESD51-7, 4-layer PCB 3
Junction-to-case(top) thermal resistance θJC 45 °C/W Note 3: Measured on JESD51-7, 4-layer PCB 3

CAD (KiCad official)

  • Symbol: TMI3359
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: tmi3359-etched.step / tmi3359-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmi3359.step / tmi3359.glb are the bare package body.

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