LP2950CDT-3.3RKG 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	Input	power_in	Unregulated supply input, VCC. Absolute maximum 30 Vdc (32 V peak transient <300 ms). For 3.3 V output, Vin must be at least VO + dropout (~3.68 V at 100 mA).
2	Ground	power_in	Device ground and reference return. Electrically common with the DPAK heatsink tab (shown as terminal 4 in the case outline drawing).
3	Output	power_out	Regulated 3.3 V output, up to 100 mA continuous (typ. current limit 220 mA). Requires ≥1.0 µF output capacitor for loop stability.
4	Tab/GND	power_in	DPAK exposed metal heatsink tab. Internally bonded to Pin 2 (Ground). Solder to a copper pour to lower junction-to-ambient thermal resistance (RθJA = 92 °C/W with recommended pad, RθJC = 6.0 °C/W).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LP2950CDT-3.3RKG
LP2950CDT-3.3RKGACDT-3.3
LP2950CDT-3.3RKGCZ-3.3
LP2950CDT-3.3RKGACZ-3.3
LP2950CDT-3.3RKGCD-3.3
LP2950CDT-3.3RKGACD-3.3
LP2950CDT-3.3RKGNCV2951ACD-3.3R2
LP2950CDT-3.3RKGCN-3.3
LP2950CDT-3.3RKGACN-3.3
LP2950CDT-3.3RKGCDM-3.3
LP2950CDT-3.3RKGACDM-3.3

CAD (KiCad official)

Symbol: LP2950CDT-3.3RKG
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
`lp2950cdt-3-3rkg.step`	119 KB	You want the bare part, or you mark your own boards.
`lp2950cdt-3-3rkg-etched.step`	2.4 MB	You want the part with `LP2950CDT-3.3RKG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 621 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 (22 pp, sha256 88c1955e96318431, 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