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LR1117DS33X

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by Ray

LRC 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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PCB Footprint

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Datasheet

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Contents

README

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LR1117DS33X

LRC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

LR1117DS33X from LRC, 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 GND power_in Ground reference for the regulator. Also serves as the thermal tab in SOT-223 (tab pin electrically bonded to Gnd on the fixed version).
2 Vout power_out Regulated 3.3V output (3.234V-3.366V, ±2%). Supplies up to 1A continuous (1.4A max). Recommend a 10µF tantalum or MLCC output capacitor (ESR 3mΩ-22Ω) close to this pin for stability.
3 Vin power_in Unregulated input supply pin. Operating range up to 15V (18V absolute max). For 3.3V output, Vin ≥ 4.8V is recommended for line-regulation spec (dropout is 1.3V at 1A). Bypass with a 10µF tantalum or MLCC capacitor.

Key specifications

Parameter Value
Manufacturer LRC
Package SOT-223
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LR1117DS33X
  • LR1117DS33XD33X

CAD (KiCad official)

  • Symbol: LR1117DS33X
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lr1117ds33x.step 64 KB You want the bare part, or you mark your own boards.
lr1117ds33x-etched.step 1.9 MB You want the part with LR1117DS33X already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 464 faces against 75 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: LRC datasheet (9 pp, sha256 67c0164382c5206c, 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