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AMS1117-1.8

Public Made by Adom

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UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs ams1117-1-8: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
ams1117-1-8-etched.fit.json ams1117-1-8: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ams1117-1-8-etched.glb ams1117-1-8: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
ams1117-1-8-etched.step ams1117-1-8: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
ams1117-1-8.glb Publish 0.1.0 · Ray 2mo ago
ams1117-1-8.kicad_mod Publish 0.1.0 · Ray 2mo ago
ams1117-1-8.kicad_sym Publish 0.1.0 · Ray 2mo ago
ams1117-1-8.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray 2mo ago
ams1117-1-8.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
page.json ams1117-1-8: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain ST… · Ray 26d ago
README.md ams1117-1-8: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

AMS1117-1.8

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

AMS1117-1.8 from UMW, 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. On the fixed-output AMS1117-1.8 variant this pin is tied to system ground (on the AMS1117-ADJ variant the same physical pin is the ADJ feedback input).
2 VOUT power_out Regulated 1.8V output (typ 1.800V, min 1.764V, max 1.836V at Iout=10mA, Vin=3.8V, Tj=25C). Rated for up to 1A load current. Requires a 22uF tantalum output capacitor for stability.
3 VIN power_in Unregulated input supply. Absolute maximum 18V, recommended operating 12V max. For 1.8V output, minimum Vin is approximately Vout + dropout (~1.2V @ 1A). A 10uF input bypass capacitor is recommended.

Key specifications

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

Ordering variants

  • AMS1117-1.8
  • AMS1117-1.8CD-1.8
  • AMS1117-1.8S-1.8

CAD (KiCad official)

  • Symbol: AMS1117-1.8
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: ams1117-1-8-etched.step / ams1117-1-8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ams1117-1-8.step / ams1117-1-8.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ams1117-1-8.step 64 KB You want the bare part, or you mark your own boards.
ams1117-1-8-etched.step 1.5 MB You want the part with AMS1117-1.8 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 389 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: UMW datasheet (13 pp, sha256 5ec219092aa45bd9, 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