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AMS1117-2.5

Public Unreviewed

by Ray

UMW 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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AMS1117-2.5

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

AMS1117-2.5 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 fixed-output AMS1117-2.5. Datasheet symbol is 'GND/ADJ' because the same silicon serves both the fixed and adjustable variants; on the fixed 2.5V version this pin is the device ground return.
2 VOUT power_out Regulated 2.5V output (min 2.450V, typ 2.500V, max 2.550V at IOUT=10mA, VIN=4.5V). Supplies up to 1A load current. Requires a 22µF tantalum output capacitor for device stability.
3 VIN power_in Unregulated input supply. Absolute maximum 18V; recommended operating input up to 12V. For the 2.5V variant a minimum input of ~4.5V is used in the datasheet characterization (VOUT + ~1.2V dropout at full load). A 10µF input bypass capacitor is recommended.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • AMS1117-2.5
  • AMS1117CD-2.5
  • AMS1117S-2.5

CAD (KiCad official)

  • Symbol: AMS1117-2.5
  • 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
ams1117-2-5.step 64 KB You want the bare part, or you mark your own boards.
ams1117-2-5-etched.step 1.5 MB You want the part with AMS1117-2.5 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 387 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