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L7812CV

Public Made by Adom

by adom

UMW Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. 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 l7812cv: 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 (pad-position, synthesised, bottom-right) · Ray
l7812cv-etched.fit.json l7812cv: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
l7812cv-etched.glb l7812cv: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
l7812cv-etched.step l7812cv: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
l7812cv-hero.glb Publish 0.2.1 · Ray
l7812cv-hero.overlay.json Publish 0.2.1 · Ray
l7812cv.glb Publish 0.1.0 · Ray
l7812cv.kicad_mod Publish 0.1.0 · Ray
l7812cv.kicad_sym Publish 0.1.0 · Ray
l7812cv.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
l7812cv.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 (pad-position, synthesised, bottom-right) · Ray
page.json Publish 0.2.1 · Ray
README.md l7812cv: specified limits as data (metadata.characteristics, 9 rows from the datasheet) · Ray

L7812CV

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

L7812CV from UMW, 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 VI power_in Unregulated positive input voltage. Absolute max input 35 V (for VO=5-18V variants). A 0.33 µF input bypass capacitor is recommended near the pin to suppress oscillation when the regulator is located far from the raw supply filter.
2 GND power_in Common ground reference for both input and output. On the TO-220 package this pin is electrically connected to the metal tab, so the tab must be treated as GND when heatsinking.
3 VO power_out Regulated +12 V output (typ; 11.4-12.6 V over line/load). Delivers up to 1.2 A with adequate heatsinking. A 0.1 µF ceramic output capacitor is recommended for transient response; larger tantalum/electrolytic caps improve stability.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • L7812CV
  • L7812CVD2T
  • L7812CVDT

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage (TJ=25°C) VO 11.5 12 12.5 V TJ=25°C 6
Output Voltage (over temperature) VO 11.4 12.6 V TJ=-40 to 125°C, VI=19V, IO=500mA 6
Quiescent Current IQ 6 mA TJ=25°C 6
Quiescent Current Change (load) ΔIQ 0.5 mA IO=5mA to 1A 6
Absolute maximum input voltage (VO=5 to 18V) VI 35 V VO=5 to 18V 1
Operating Temperature Range TOPR -40 125 °C 1
Storage Temperature Range TSTG -65 150 °C 1
Thermal Resistance Junction-case (TO-220) RthJC 5 °C/W 1
Thermal Resistance Junction-ambient (TO-220) RthJA 50 °C/W 1

CAD (KiCad official)

  • Symbol: L7812CV
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: l7812cv-etched.step / l7812cv-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l7812cv.step / l7812cv.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
l7812cv.step 83 KB You want the bare part, or you mark your own boards.
l7812cv-etched.step 611 KB You want the part with L7812CV already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 164 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: UMW datasheet (18 pp, sha256 187ff89cc4c93f6a, 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