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IL1117C-AD

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by Ray

IKSEMICON IL1117C AD 1 25 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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IL1117C-AD

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

IL1117C-AD from IKSEMICON, 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 ADJ input Adjust pin for the adjustable IL1117C-AD variant. Connect to an external resistor divider between VOUT and GND to program the output voltage; internal reference is ~1.25 V. Adjust pin current ~56 µA typical (80 µA max). On fixed-voltage variants this same pin serves as GND.
2 VOUT power_out Regulated output voltage, up to 1 A. Requires a minimum 10 µF tantalum output capacitor for transient response and stability. In the SOT-223 package pin 2 is fused to the tab/heat sink for thermal dissipation.
3 VIN power_in Unregulated input supply, absolute maximum 15 V. A 10 µF tantalum input capacitor is recommended when the regulator is located far from the supply filter. Must be at least VOUT + dropout (typ 1.2 V, max 1.4 V at 1 A, 25 °C).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • IL1117C-AD
  • IL1117C-AD-1.25
  • IL1117C-AD-1.5
  • IL1117C-AD-1.8
  • IL1117C-AD-2.5
  • IL1117C-AD-2.85
  • IL1117C-AD-3.0
  • IL1117C-AD-3.3
  • IL1117C-AD-3.5
  • IL1117C-AD-5.0
  • IL1117C-ADD0T
  • IL1117C-AD-1.25D0T
  • IL1117C-AD-1.5D0T
  • IL1117C-AD-1.8D0T
  • IL1117C-AD-2.5D0T
  • IL1117C-AD-2.85D0T
  • IL1117C-AD-3.0D0T
  • IL1117C-AD-3.3D0T
  • IL1117C-AD-3.5D0T
  • IL1117C-AD-5.0D0T
  • IL1117C-ADPT
  • IL1117C-AD-1.25PT
  • IL1117C-AD-1.5PT
  • IL1117C-AD-1.8PT
  • IL1117C-AD-2.5PT
  • IL1117C-AD-2.85PT
  • IL1117C-AD-3.0PT
  • IL1117C-AD-3.3PT
  • IL1117C-AD-3.5PT
  • IL1117C-AD-5.0PT

CAD (KiCad official)

  • Symbol: IL1117C-AD
  • 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
il1117c-ad.step 64 KB You want the bare part, or you mark your own boards.
il1117c-ad-etched.step 1.1 MB You want the part with IL1117C-AD already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 309 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: IKSEMICON datasheet (13 pp, sha256 c1cbde9b41d88821, 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