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AMS1117CD-1.2

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UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs ams1117cd-1-2: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain… · 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
ams1117cd-1-2-etched.fit.json ams1117cd-1-2: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
ams1117cd-1-2-etched.glb ams1117cd-1-2: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain… · Ray 26d ago
ams1117cd-1-2-etched.step ams1117cd-1-2: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain… · Ray 26d ago
ams1117cd-1-2.glb Publish 0.1.0 · Ray 2mo ago
ams1117cd-1-2.kicad_mod Publish 0.1.0 · Ray 2mo ago
ams1117cd-1-2.kicad_sym Publish 0.1.0 · Ray 2mo ago
ams1117cd-1-2.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
ams1117cd-1-2.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.1 · Ray 14h 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 Publish 0.2.1 · Ray 14h ago
README.md ams1117cd-1-2: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 27d ago

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage (AMS1117-1.2 fixed) VOUT 1.176 1.2 1.224 V IOUT=10mA, VIN=3.2V, TJ=25°C 4
Adjust pin Current Iadj 60 120 µA 5
Adjust pin Current Change 0.2 5 µA 0≤IOUT≤1A, 1.4V≤VIN-VOUT≤10V 5
Ripple Rejection PSRR 60 75 dB fRIPPLE=120Hz, (VIN-VOUT)=3V, VRIPPLE=1VPP 4
Dropout Voltage Vdrop 1.2 1.3 V IOUT=1A 4
Quiescent Current Iq 5 10 mA 4
Thermal shutdown TSD 150 °C 5
Current limiting Ilimit 2.1 A 5
Temperature Stability 0.5 % 5
Long Term Stability 0.3 % TA=125°C, 1000Hrs 5
RMS Output Noise 0.003 % of VOUT 10Hz≤f≤10kHz 5
Input Supply Voltage VIN 18 V 3
Lead Temperature (Soldering, 5 seconds) TLead 260 °C 5 seconds soldering 3
Junction Temperature Range TJ 150 °C 3
Storage Temperature Range TSTG -65 150 °C 3
ESD Tolerance (Minimum) ESD 2000 V 3
Thermal Resistance from Junction to Ambient (TO-252) Rja 100 °C/W 3
Input voltage (recommended) VIN 12 V 3
Junction Temperature Range (recommended) TJ -40 125 °C 3

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 files: ams1117cd-1-2-etched.step / ams1117cd-1-2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ams1117cd-1-2.step / ams1117cd-1-2.glb are the bare package body.

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