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sti3411a

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by Ray

TMI DC-DC Converters, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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STI3411A

TMI · DC-DC Converters · SOT-23-5

STI3411A 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 (max threshold) to turn the converter on; drive below 0.3V (min threshold) to shut it down (<1µA shutdown current). Must not be left floating. Absolute max -0.3V to 6.5V.
2 GND power_in Device ground return. Common return for the internal power MOSFETs and the analog control circuitry; connect directly to the (-) plates of Cin and Cout with a short, wide trace.
3 LX output Power switch output / inductor switch node. Common drain connection of the internal P-channel (150 mΩ) high-side and N-channel (70 mΩ) low-side MOSFETs. Connects to the external inductor (typ. 1µH-4.7µH). Absolute max -0.3V to 6.5V (transient tolerant to -3.5V/7.5V for <5ns).
4 VIN power_in Power supply input, 2.5V to 6V operating range (6.5V OVP threshold, absolute max 6.5V). Bypass with a low-ESR ceramic capacitor (22µF X5R/X7R typical) placed as close as possible to the pin.
5 FB input Output voltage feedback. Compared against the internal 0.600V reference (±2% at 25°C). Set VOUT with an external divider: R1 = R2 * (VOUT/0.6 - 1); recommended R2 = 59kΩ (noise immunity) or 316kΩ (lower Iq). Absolute max -0.3V to 6.5V.

Key specifications

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

Ordering variants

  • STI3411A

CAD (KiCad official)

  • Symbol: STI3411A
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: TMI datasheet (None pp, sha256 fb51756a490a02d0, 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

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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