NCP1117DTARKG from onsemi, in a 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	Adjust/Ground	input	For fixed-output variants (e.g. XT285 for 2.85 V, XT33 for 3.3 V, XT50 for 5.0 V, XT12 for 12 V), this is the Ground return pin. For the adjustable variant (XTA), this is the Adjust pin - feedback node with a 1.25 V reference (Vref = 1.238-1.262 V) and an adjust-pin current of ~52 μA (max 120 μA); output = Vref × (1 + R2/R1) + Iadj × R2.
2	Output	power_out	Regulated positive output. Sources up to 1.0 A (typical current limit 1.5 A, min 1.0 A, max 2.2 A). Requires a 10 μF output capacitor for stability. The DPAK heatsink tab is internally connected to this Output pin (pin 2).
3	Input	power_in	Unregulated positive input supply, up to 20 V maximum (Vin abs max = 20 V). Requires a 10 μF input capacitor. Output current must not exceed 1.0 A when Vin > 12 V. Dropout voltage typically 0.95 V at 100 mA, 1.07 V at 800 mA.
TAB	Tab	power_out	Thermal heatsink tab, internally connected to pin 2 (Output). Used for heat dissipation to the PCB copper pour; θJA = 67 °C/W (min-size pad), θJC = 6.0 °C/W for the DPAK package.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	DPAK
Category	PMIC
Pins	4

Ordering variants

Same part, different packaging or reel option.

NCP1117DTARKG
NCP1117DTARKGDTRKG
NCP1117DTARKGDTG
NCP1117DTARKGSTARKG
NCP1117DTARKGSTRKG
NCP1117DTARKGSTG

CAD (KiCad official)

Symbol: NCP1117DTARKG
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: DPAK (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ncp1117dtarkg.step`	119 KB	You want the bare part, or you mark your own boards.
`ncp1117dtarkg-etched.step`	1.7 MB	You want the part with `NCP1117DTARKG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 459 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: onsemi datasheet (17 pp, sha256 e6a781dcd70d804e, 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