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CJ7912

Public Made by Adom

by adom

Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. 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 cj7912: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
cj7912-etched.fit.json cj7912: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj7912-etched.glb cj7912: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray
cj7912-etched.step cj7912: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray
cj7912.glb Publish 0.1.0 · Ray
cj7912.kicad_mod Publish 0.1.0 · Ray
cj7912.kicad_sym Publish 0.1.0 · Ray
cj7912.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
cj7912.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · 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 cj7912: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray
README.md cj7912: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CJ7912

Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2L

CJ7912 from Changjing, in a TO-252-2L. 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 GND power_in Common ground reference. On the TO-252-2L package pin 1 is also the tab/DAP (D-Pak) heatsink connection.
2 IN power_in Negative unregulated input supply. Operating range -14.5 V to -30 V (absolute maximum -35 V). Requires a 2.2 µF input capacitor (Ci) to ground for stability.
3 OUT power_out Regulated -12 V negative output. Delivers up to 1.5 A peak (2.1 A typical current-limit). Requires a 1 µF output capacitor (Co) to ground for transient response and stability.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-252-2L
Category PMIC
Pins 3

CAD (KiCad official)

  • Symbol: CJ7912
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2L (KiCad packages3D, STEP)
  • 3D model files: cj7912-etched.step / cj7912-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj7912.step / cj7912.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cj7912.step 119 KB You want the bare part, or you mark your own boards.
cj7912-etched.step 1.2 MB You want the part with CJ7912 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 324 faces against 83 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: Changjing datasheet (3 pp, sha256 7a1b26ae9a6e522f, 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