LD1117-1.2 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/GND	power_in	Ground return for fixed-output versions (LD1117-1.2 ties this pin to system ground). On adjustable variants this is the ADJ feedback node driven by the external R1/R2 divider; adjust-pin current is typically 60 uA (max 120 uA).
2	VOUT	power_out	Regulated 1.2 V output (min 1.176 V, max 1.224 V at Iout = 10 mA, Vin = 3.2 V, Tj = 25 C). Sources up to 1 A; requires a 22 uF tantalum (or equivalent) output capacitor for stability. Internally protected by current limit (1.25-1.6 A) and thermal shutdown (~150 C).
3	VIN	power_in	Unregulated input supply. Recommended operating input voltage up to 12 V; absolute maximum 18 V. Bypass with a 10 uF capacitor close to the pin. Vin must exceed Vout by at least the dropout voltage (typ 1.2 V at 1 A).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LD1117-1.2
LD1117-1.2CD
LD1117-1.2S

CAD (KiCad official)

Symbol: LD1117-1.2
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
`ld1117-1-2.step`	64 KB	You want the bare part, or you mark your own boards.
`ld1117-1-2-etched.step`	1.1 MB	You want the part with `LD1117-1.2` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 298 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 (14 pp, sha256 b65a8249b6e9e313, 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