L5972D013TR from STMicroelectronics, in a SOIC-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	OUT	output	Regulator switching output. Connects to the external inductor of the step-down converter. DC voltage rating -1 to 40V (peak -5 to 40V at Δt = 0.1µs).
2	GND	power_in	Ground return.
3	GND	power_in	Ground return.
4	COMP	output	Error amplifier output for frequency compensation. Typically connected to an RC network (e.g. 4.7kΩ + 220pF, with 22nF to GND) to set loop dynamics. Max voltage 4V.
5	FB	input	Feedback input to the internal error amplifier. Reference voltage is 1.235V (typ); tie directly for 1.235V output or use an external resistive divider for higher output voltages. Max voltage 4V.
6	GND	power_in	Ground return.
7	GND	power_in	Ground return.
8	VCC	power_in	Unregulated DC input voltage. Operating range 4.4V to 36V (absolute max 40V). Decouple with a bulk capacitor (e.g. 10µF/35V ceramic) close to the pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

L5972D013TR

CAD (KiCad official)

Symbol: L5972D013TR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`l5972d013tr.step`	122 KB	You want the bare part, or you mark your own boards.
`l5972d013tr-etched.step`	2.2 MB	You want the part with `L5972D013TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 551 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 (15 pp, sha256 62643e206e45a4a4, 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