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LM1108SF-3.3

Public Unreviewed

by Ray

HTC Korea TAEJIN Tech LM1108SF 3 3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiclm1108sf-3.3
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3D Model

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Symbol & Footprint

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Contents

README

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LM1108SF-3.3

HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

LM1108SF-3.3 from HTC Korea TAEJIN Tech, in a SOT-23. 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 Device ground / negative supply return. Vout is referenced to this node.
2 Vin power_in Unregulated input supply. Absolute max +6.5V; must be at least Vout + dropout (~0.3V at 300mA for Vout>2.5V). A 1µF bypass capacitor to GND is recommended if the source is a battery or the trace to the AC filter capacitor exceeds ~10 inches.
3 Vout power_out Regulated 3.3V output, up to 300mA. Requires a ≥1µF capacitor to GND with ESR between 0.1Ω and (nominally) a few Ω for stability; MLCC is supported.

Key specifications

Parameter Value
Manufacturer HTC Korea TAEJIN Tech
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LM1108SF-3.3SF-X.X
  • LM1108SF-3.3BSF-X.X
  • LM1108SF-3.3GSF-X.X
  • LM1108SF-3.3F-X.X

The extractor listed these alongside LM1108SF-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • LM1108SF-3.3SF5-X.X

CAD (KiCad official)

  • Symbol: LM1108SF-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: HTC Korea TAEJIN Tech datasheet (4 pp, sha256 23693b1643b8dc6b, 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