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AMS1117CD-ADJ

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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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AMS1117CD-ADJ

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

AMS1117CD-ADJ 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 ADJ input Adjust pin. Feedback input for the internal error amplifier; connect to the tap of an external R1/R2 divider from VOUT to GND to set output voltage per VOUT = VREF x (1 + R2/R1) + IADJ x R2, where VREF = 1.25V (typ) and IADJ ~= 60uA (typ, 120uA max).
2 VOUT power_out Regulated output. Supplies up to 1A of regulated current. Requires a 22uF tantalum output capacitor for stability. Output is set by external divider on the ADJ variant; internal reference is 1.25V (typ).
3 VIN power_in Input supply. Absolute maximum 18V; recommended operating maximum 12V. Dropout voltage typ 1.2V at 1A. Recommend 10uF bypass capacitor from VIN to GND.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • AMS1117CD-ADJ
  • AMS1117CD-ADJCD-1.2
  • AMS1117CD-ADJCD-1.5
  • AMS1117CD-ADJCD-1.8
  • AMS1117CD-ADJCD-2.5
  • AMS1117CD-ADJCD-3.3
  • AMS1117CD-ADJCD-5.0
  • AMS1117CD-ADJ-1.2
  • AMS1117CD-ADJ-1.5
  • AMS1117CD-ADJ-1.8
  • AMS1117CD-ADJ-2.5
  • AMS1117CD-ADJ-3.3
  • AMS1117CD-ADJ-5.0
  • AMS1117CD-ADJS-1.2
  • AMS1117CD-ADJS-1.5
  • AMS1117CD-ADJS-1.8
  • AMS1117CD-ADJS-2.5
  • AMS1117CD-ADJS-3.3
  • AMS1117CD-ADJS-5.0

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

  • AMS1117CD-ADJS-ADJ

CAD (KiCad official)

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

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