79D05 from Foshan Blue Rocket Elec, in a TO-252. 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 reference pin. Common return for the negative regulator; carries the sum of load and quiescent (bias) currents (Id typ. 8mA max).
2	IN	power_in	Negative unregulated input voltage (VIN). Operating input range approximately -7V to -25V; absolute maximum input-to-output differential -35V. Requires a 0.33uF input decoupling capacitor to GND.
3	OUT	power_out	Regulated -5V output (typ. -5.0V, -4.8V to -5.2V at Tj=25C). Delivers up to 1.0A load current with dropout ~1.4V at 1A. Requires a 0.1uF output capacitor to GND for stability.
4	TAB	power_in	Exposed thermal tab on the back of the TO-252 package, electrically connected to GND (pin 1). Provides the primary heat-sink path; RthetaJC = 5 C/W, RthetaJA = 65 C/W.

Key specifications

Parameter	Value
Manufacturer	Foshan Blue Rocket Elec
Package	TO-252
Category	PMIC
Pins	4

CAD (KiCad official)

Symbol: 79D05
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`79d05.step`	119 KB	You want the bare part, or you mark your own boards.
`79d05-etched.step`	1.2 MB	You want the part with `79D05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 311 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: Foshan Blue Rocket Elec datasheet (6 pp, sha256 710806ef2011ac1d, 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