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AMS1117-2.5V

Public Made by Adom

by adom

MSKSEMI 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 ams1117-2-5v: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · 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
ams1117-2-5v-etched.fit.json ams1117-2-5v: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ams1117-2-5v-etched.glb ams1117-2-5v: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 26d ago
ams1117-2-5v-etched.step ams1117-2-5v: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 26d ago
ams1117-2-5v.glb Publish 0.1.0 · Ray 2mo ago
ams1117-2-5v.kicad_mod fix footprint: SOT-223-3_TabPin2 -> SOT-223 (symbol has pins 1,2,3,4; the old footprint left pad(s) with no net) · Ray 2mo ago
ams1117-2-5v.kicad_sym Publish 0.1.0 · Ray 2mo ago
ams1117-2-5v.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
ams1117-2-5v.step Publish 0.1.0 · Ray 2mo ago
package.json ams1117-2-5v: manufacturer 'MSKSEMI' (was 'MSKSEMI AMS1117 2 5V': the MPN had been folded in) · Ray 1mo 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 ams1117-2-5v: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 26d ago
README.md ams1117-2-5v: manufacturer 'MSKSEMI' (was 'MSKSEMI AMS1117 2 5V': the MPN had been folded in) · Ray 1mo ago

AMS1117-2.5V

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

AMS1117-2.5V from MSKSEMI, 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 / VSS reference pin. On the fixed 2.5 V version this pin is the device ground return (the datasheet labels the pin 'VSS/ADJ' because the same silicon is used for the adjustable variant, where it becomes the ADJ feedback input).
2 VOUT power_out Regulated 2.5 V output (typ. 2.5 V, min 2.45 V, max 2.55 V at Vin=3.8 V, 0 ≤ Iout ≤ 1 A). Requires a ~10 uF tantalum output capacitor for stability.
3 VIN power_in Unregulated input voltage. For the 2.5 V variant, Vin must be ≥ 3.8 V for full regulation (dropout ~1.3 V @ 1 A). Absolute maximum input voltage is 18 V; recommended maximum operating input is 15 V. Requires a ~10 uF tantalum bypass capacitor.
4 VOUT power_out Regulated 2.5 V output; electrically connected to pin 2. This is the large tab pad on the SOT-223 package and also serves as the primary thermal path to the PCB copper pour.

Key specifications

Parameter Value
Manufacturer MSKSEMI
Package SOT-223
Category PMIC
Pins 4

Ordering variants

  • AMS1117-2.5VAMS1117-25
  • AMS1117-2.5VAMS1117CD-25

CAD (KiCad official)

  • Symbol: AMS1117-2.5V
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: ams1117-2-5v-etched.step / ams1117-2-5v-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ams1117-2-5v.step / ams1117-2-5v.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ams1117-2-5v.step 64 KB You want the bare part, or you mark your own boards.
ams1117-2-5v-etched.step 1.5 MB You want the part with AMS1117-2.5V already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 404 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: MSKSEMI datasheet (14 pp, sha256 768f1a5d913d6211, 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