AMS1117-ADJ 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	ADJ	input	Adjust pin. Connect to the mid-point of an external resistor divider between VOUT and GND to set the output voltage per VOUT = VREF x (1 + R2/R1) + IADJ x R2, where VREF = 1.25V typical and IADJ = 60 uA typical (120 uA max).
2	VOUT	power_out	Regulated output voltage. Requires an output capacitor for stability (22 uF tantalum recommended). Rated for 1A continuous output current.
3	VIN	power_in	Input supply voltage. Absolute maximum 18V; recommended operating input up to 12V. A 10 uF input capacitor is recommended.

Key specifications

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

Ordering variants

AMS1117-ADJ
AMS1117-ADJCD-ADJ
AMS1117-ADJS-ADJ

CAD (KiCad official)

Symbol: AMS1117-ADJ
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-adj.step`	64 KB	You want the bare part, or you mark your own boards.
`ams1117-adj-etched.step`	1.4 MB	You want the part with `AMS1117-ADJ` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 373 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