L79L05ACD13TR from STMicroelectronics, in a SO-8. 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	VOUT	power_out	Regulated -5 V output. Deliver up to 100 mA. Requires a 0.1 uF output capacitor for stability per the test circuit.
2	VIN	power_in	Negative unregulated input voltage. Absolute maximum -30 V for -5 to -9 V output versions. Requires a 0.33 uF input capacitor per the test circuit. Internally shorted to pins 3, 6, and 7 via the die attach flag for thermal dissipation.
3	VIN	power_in	Negative unregulated input voltage. Internally commoned to pins 2, 6, and 7 via the die attach flag for improved thermal dissipation.
4	NC	unconnected	No connect. Leave floating or tie to VIN for board layout convenience.
5	GND	power_in	Ground reference (0 V). Common return for input and output; regulated output is negative relative to this pin.
6	VIN	power_in	Negative unregulated input voltage. Internally commoned to pins 2, 3, and 7 via the die attach flag for improved thermal dissipation.
7	VIN	power_in	Negative unregulated input voltage. Internally commoned to pins 2, 3, and 6 via the die attach flag for improved thermal dissipation.
8	NC	unconnected	No connect. Not bonded to the die.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SO-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

L79L05ACD13TR
L79L05ABD13TR
L79L08ACD13TR
L79L12ACD13TR
L79L15ABD13TR
L79L15ACD13TR
L79L05ACZ
L79L05ABZ-AP
L79L08ACZ-AP
L79L05ACZ-TR
L79L12ACZ-TR
L79L05ABUTR
L79L05ACUTR
L79L12ACUTR
L79L15ACUTR

CAD (KiCad official)

Symbol: L79L05ACD13TR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`l79l05acd13tr.step`	122 KB	You want the bare part, or you mark your own boards.
`l79l05acd13tr-etched.step`	2.4 MB	You want the part with `L79L05ACD13TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 586 faces against 147 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 (24 pp, sha256 ba2a02bb5533f64a, 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