LD1117DT12CTR from STMicroelectronics, in a TO-252-2(DPAK). 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	Device ground reference. Sets the return path for the pass element and the internal reference; the regulator's fixed output voltage (1.2 V for the #12 option) is measured with respect to this pin.
2	VOUT	power_out	Regulated output, 1.2 V nominal (±1 % at 25 °C), up to 800 mA. Requires a 10 µF minimum output capacitor for stability. Electrically connected to the DPAK exposed tab.
3	VIN	power_in	Unregulated supply input. Operating range extends up to 15 V DC (absolute max 18 V when IOUT < 20 mA). A 100 nF input decoupling capacitor is recommended per the application circuit.
TAB	VOUT	power_out	Exposed metal tab electrically tied to VOUT (pin 2), providing the primary thermal path to the PCB copper. Solder to the VOUT pad for both electrical connection and heat spreading (RthJC = 8 °C/W for DPAK).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	TO-252-2(DPAK)
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

LD1117DT12CTR
LD1117DT12C-TR
LD1117DT12TR
LD1117DT12CTRV12
LD1117DT12CTRV12C
LD1117DT12CTRS12
LD1117DT12CTRS12TR
LD1117DT12CTRS12C
LD1117DT12CTRS12CTR
LD1117DT12CTRD12
LD1117DT12CTRD12TR
LD1117DT12CTRD12C
LD1117DT12CTRD12CTR

CAD (KiCad official)

Symbol: LD1117DT12CTR
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ld1117dt12ctr.step`	119 KB	You want the bare part, or you mark your own boards.
`ld1117dt12ctr-etched.step`	1.7 MB	You want the part with `LD1117DT12CTR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 454 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: STMicroelectronics datasheet (44 pp, sha256 1b80923ec6ca9161, retrieved 2026-08-17, tier: manufacturer)
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