NCP1117DT33RKG from onsemi, 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	Ground / common return for the fixed-output regulator. On fixed voltage devices (such as the DT33 3.3 V option) this pin serves as the ground reference; on the adjustable (LT) version this same pin is the Adjust input. Ground current I_gnd is typically 3.0 mA to 5.0 mA.
2	VOUT	power_out	Regulated 3.3 V output (typ 3.300 V, min 3.235 V, max 3.365 V over line/load). Capable of sourcing in excess of 1.0 A. A minimum ~4.7 uF (ESR 33 mOhm to 2.2 Ohm) capacitor to ground is required for loop stability.
3	VIN	power_in	Unregulated input supply, up to 20 V absolute maximum. Must be at least V_out + V_dropout (~1.2 V max at 800 mA) above the target output. A 10 uF ceramic or tantalum input bypass capacitor is recommended and should be mounted with the shortest possible track between the input and ground terminals.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	TO-252-2(DPAK)
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

NCP1117DT33RKG
NCP1117DT33G
NCP1117DT33RKGST33T3G
NCP1117DT33RKGST

CAD (KiCad official)

Symbol: NCP1117DT33RKG
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
`ncp1117dt33rkg.step`	119 KB	You want the bare part, or you mark your own boards.
`ncp1117dt33rkg-etched.step`	2.1 MB	You want the part with `NCP1117DT33RKG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 555 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 1852f8c8cf0eb18c, 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