component

1117-3.3

Public Unreviewed

by Ray

IDCHIP 1117 3 3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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1117-3.3

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

1117-3.3 from IDCHIP, 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 fixed-output (3.3V) version. On adjustable variants this same pin is the ADJ feedback input; on the -3.3 fixed part it is tied to system ground.
2 VOUT power_out Regulated 3.3V output (±1% at TJ=25°C, 3.235-3.365V over 10mA-1A, VIN 4.75-10V). Requires at least 22µF output capacitor for stability per the typical application circuit.
3 VIN power_in Unregulated input supply, up to 12V absolute maximum. For the 3.3V variant, recommended VIN range is 4.75V to 10V. Typical application uses a 10µF input capacitor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • 1117-3.3H
  • 1117-3.3H-3.3
  • 1117-3.3R
  • 1117-3.3T
  • 1117-3.3S
  • 1117-3.3D

The extractor listed these alongside 1117-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • 1117-3.3H-1.8
  • 1117-3.3H-ADJ

CAD (KiCad official)

  • Symbol: 1117-3.3
  • 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
1117-3-3.step 64 KB You want the bare part, or you mark your own boards.
1117-3-3-etched.step 1.2 MB You want the part with 1117-3.3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 303 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: IDCHIP datasheet (9 pp, sha256 860cbde3d5dfdba4, 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