component

NCP1117IST18T3G

Public Unreviewed

by Ray

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

componentpmicncp1117ist18t3g
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads only if this page sits in the background.

PCB Footprint

Open full view ↗
Loads on click. Unloads only if this page sits in the background.

Datasheet

Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Download PDF
Contents

README

markdown

NCP1117IST18T3G

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

NCP1117IST18T3G from onsemi, 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 device. On the adjustable variant this pin functions as the Adjust input; on the fixed 1.8 V NCP1117IST18T3G it is the device ground.
2 VOUT power_out Regulated 1.8 V output (1.782 V to 1.818 V typ at 10 mA, 25 °C). Sources up to 1.0 A. The SOT-223 heatsink tab is internally connected to this pin. Recommended 10 uF output capacitor.
3 VIN power_in Unregulated positive supply input, up to 20 V absolute maximum. Requires at least Vout + dropout (~1.2 V at 800 mA). Recommended 10 uF input capacitor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • NCP1117IST18T3G
  • NCP1117IST18T3GDT

CAD (KiCad official)

  • Symbol: NCP1117IST18T3G
  • 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
ncp1117ist18t3g.step 64 KB You want the bare part, or you mark your own boards.
ncp1117ist18t3g-etched.step 2.3 MB You want the part with NCP1117IST18T3G already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 583 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: onsemi datasheet (19 pp, sha256 8bd6d0050aa83242, 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