component

AMS1117CD-1.2

Public Unreviewed

by Ray

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Contents

README

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AMS1117CD-1.2

UMW · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

AMS1117CD-1.2 from UMW, in a TO-252-2. 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 regulator (labelled ADJ/GND in the pinning table; on fixed-voltage versions this pin is the device ground return). Connect to the system ground plane.
2 VOUT power_out Regulated 1.2V output. Typical accuracy 2% (1.176V min / 1.224V max at IOUT=10mA, VIN=3.2V, TJ=25°C). Requires a 22µF tantalum output capacitor for stability. Supplies up to 1A of load current.
3 VIN power_in Unregulated input supply. Absolute maximum 18V; recommended operating input up to 12V. VIN must exceed VOUT by at least the dropout voltage (typ 1.2V @ 1A). A 10µF input decoupling capacitor is recommended.

Key specifications

Parameter Value
Manufacturer UMW
Package TO-252-2
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • AMS1117CD-1.2
  • AMS1117CD-1.2S
  • AMS1117CD-1.2-ADJS

The extractor listed these alongside AMS1117CD-1.2, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • AMS1117CD-1.8
  • AMS1117CD-1.2CD-3.3
  • AMS1117CD-1.2CD-5.0
  • AMS1117CD-1.2CD-ADJ
  • AMS1117CD-1.2-1.5
  • AMS1117CD-1.2-1.8
  • AMS1117CD-1.2-2.5
  • AMS1117CD-1.2-3.3
  • AMS1117CD-1.2-5.0
  • AMS1117CD-1.2-ADJ
  • AMS1117CD-1.2-3.3s
  • AMS1117CD-1.2-5.0S

CAD (KiCad official)

  • Symbol: AMS1117CD-1.2
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ams1117cd-1-2.step 119 KB You want the bare part, or you mark your own boards.
ams1117cd-1-2-etched.step 1.6 MB You want the part with AMS1117CD-1.2 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 433 faces against 83 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