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LM39100S-3.3

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by Ray

HTC Korea TAEJIN Tech LM39100S 3 3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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LM39100S-3.3

HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

LM39100S-3.3 from HTC Korea TAEJIN Tech, in a SOT-223. 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 VIN power_in Input supply. Operating range +2.25V to +16V (absolute max +20V). A guaranteed 630mV max dropout at 1A allows 3.3V output from a supply as low as ~3.93V. Bypass close to the pin.
2 GND power_in Ground reference. Also the exposed tab of the SOT-223 package for thermal dissipation (θJA ≈ 115°C/W). Ground current ~12mA typical at 1A load.
3 VOUT power_out Regulated 3.3V fixed output, 1A guaranteed. 1% initial accuracy. Requires an output capacitor for stability and transient response.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package SOT-223
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LM39100S-3.3V
  • LM39100GS-3.3V
  • LM39100RS-3.3V
  • LM39100GRS-3.3V
  • LM39101RS-3.3V
  • LM39101GRS-3.3V
  • LM39101D-3.3V

CAD (KiCad official)

  • Symbol: LM39100S-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: HTC Korea TAEJIN Tech datasheet (13 pp, sha256 321c243a9197aec5, 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