component

CJ78L05

Public Made by Adom

by adom

Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs cj78l05: 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
cj78l05-etched.fit.json cj78l05: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj78l05-etched.glb cj78l05: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj78l05-etched.step cj78l05: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj78l05.glb Publish 0.1.0 · Ray
cj78l05.kicad_mod Publish 0.1.0 · Ray
cj78l05.kicad_sym Publish 0.1.0 · Ray
cj78l05.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
cj78l05.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 cj78l05: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CJ78L05

Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L

CJ78L05 from Changjing, in a SOT-89-3L. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 OUT power_out Regulated +5 V output. Nominal 5.0 V (4.75 V to 5.25 V over full load/line). Recommend 0.1 uF ceramic bypass capacitor close to the pin for transient response.
2 GND power_in Common ground return for input and output. Also acts as the package heatsink tab (SOT-89 large center pad) for thermal dissipation.
3 IN power_in Unregulated DC input. Recommended operating range 7 V to 20 V; absolute maximum 30 V. Requires 0.33 uF bypass capacitor close to the pin when the regulator is far from the input filter.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-89-3L
Category PMIC
Pins 3

CAD (KiCad official)

  • Symbol: CJ78L05
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: cj78l05-etched.step / cj78l05-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj78l05.step / cj78l05.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cj78l05.step 57 KB You want the bare part, or you mark your own boards.
cj78l05-etched.step 1.1 MB You want the part with CJ78L05 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 288 faces against 42 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 (4 pp, sha256 7bd7279ca9a27801, 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