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L7809CV-DG

Public Unreviewed

by Ray

STMicroelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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L7809CV-DG

STMicroelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

L7809CV-DG from STMicroelectronics, in a TO-220. 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 INPUT power_in Unregulated positive supply input (V_I). Recommended input range for a 9 V output part is roughly 11.5 V to 35 V (V_O + dropout, up to absolute-max 35 V). A 0.33 uF ceramic bypass capacitor to GND is recommended when the regulator is located far from the power supply filter.
2 GROUND power_in Common ground reference for both input and output. Also electrically connected to the mounting tab of the TO-220 package.
3 OUTPUT power_out Regulated +9 V output (V_O). Capable of delivering up to 1.5 A with adequate heatsinking. A 0.1 uF ceramic output capacitor is recommended for transient response.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TO-220
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • L7809CV-DG
  • L7809CP
  • L7809CD2T-TR

CAD (KiCad official)

  • Symbol: L7809CV-DG
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
l7809cv-dg.step 83 KB You want the bare part, or you mark your own boards.
l7809cv-dg-etched.step 880 KB You want the part with L7809CV-DG already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 229 faces against 48 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 (58 pp, sha256 83f591a9457f6fe3, 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