LM2931CDR2G from onsemi, 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	Output	power_out	Regulated output. Adjustable from 3.0 V to 24 V, capable of supplying >100 mA with typical dropout of 0.16 V at 100 mA. Requires >=100 uF output capacitor (C_O(ESR) ~0.3 ohm) for stability.
2	GND	power_in	Ground / device return. Tied together with pins 3, 6, 7 for the SOIC-8 package (also serves as heat-spreader).
3	GND	power_in	Ground / device return. Tied together with pins 2, 6, 7 for the SOIC-8 package (also serves as heat-spreader).
4	Adjust	input	Feedback / adjust pin. The reference voltage (Vref = 1.20 V typ) is developed between Output and Adjust across R1. Adjust-pin current is typically 0.2 uA. Set output with Vout = Vref * (1 + R2/R1) + I_Adj*R2.
5	Output Inhibit	input	Active-high shutdown input. Output-off threshold >=2.50 V (25 C), output-on threshold <=1.90 V (25 C). Threshold current ~30 uA typ (50 uA max) at V_th(OI)=2.5 V. Useful for microprocessor-based enable/disable.
6	GND	power_in	Ground / device return. Tied together with pins 2, 3, 7 for the SOIC-8 package (also serves as heat-spreader).
7	GND	power_in	Ground / device return. Tied together with pins 2, 3, 6 for the SOIC-8 package (also serves as heat-spreader).
8	Input	power_in	Unregulated supply input. Continuous rating 40 Vdc, transient 60 Vpk (<=100 ms load dump), reverse-polarity transient -50 Vpk. Over-voltage shutdown threshold 29.5 V typ (26 V min).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM2931CDR2G
LM2931ACDR2G
LM2931CDR2GNCV2931CDR2G
LM2931CDR2GNCV2931ACDR2G
LM2931CTH
LM2931CDR2GTH SUFFIX
LM2931CTV
LM2931CDR2GTV SUFFIX
LM2931CT
LM2931CDR2GT SUFFIX (Case 314D)
LM2931CD2T
LM2931CDR2GD2T SUFFIX (Case 936A)

CAD (KiCad official)

Symbol: LM2931CDR2G
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
`lm2931cdr2g.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2931cdr2g-etched.step`	2.4 MB	You want the part with `LM2931CDR2G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 573 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: onsemi datasheet (23 pp, sha256 df9ec9ec42038b2b, 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