component

LM2931CDR2G

Public Made by Adom

by adom

onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm2931cdr2g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lm2931cdr2g-etched.fit.json lm2931cdr2g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2931cdr2g-etched.glb lm2931cdr2g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2931cdr2g-etched.step lm2931cdr2g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm2931cdr2g-hero.glb Publish 0.2.1 · Ray
lm2931cdr2g-hero.overlay.json Publish 0.2.1 · Ray
lm2931cdr2g.glb Publish 0.1.0 · Ray
lm2931cdr2g.kicad_mod Publish 0.1.0 · Ray
lm2931cdr2g.kicad_sym Publish 0.1.0 · Ray
lm2931cdr2g.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
lm2931cdr2g.step Publish 0.1.0 · Ray
package.json Publish 0.2.1 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json Publish 0.2.1 · Ray
README.md lm2931cdr2g: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM2931CDR2G

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8

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 files: lm2931cdr2g-etched.step / lm2931cdr2g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2931cdr2g.step / lm2931cdr2g.glb are the bare package body.

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