component

CJ88120

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
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docs cj88120: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers cj88120: viewers · Ray
cj88120-etched.fit.json cj88120: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj88120-etched.glb cj88120: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj88120-etched.step cj88120: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj88120.glb Publish 0.1.0 · Ray
cj88120.kicad_mod Publish 0.1.0 · Ray
cj88120.kicad_sym Publish 0.1.0 · Ray
cj88120.lbr Publish 0.1.0 · Ray
cj88120.step Publish 0.1.0 · Ray
package.json Publish 0.2.1 · Ray
page.json Publish 0.2.1 · Ray
README.md cj88120: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CJ88120

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

CJ88120 from Changjing, in a SOT-89-3L. 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 Ground / VSS reference terminal. All voltages in the datasheet are referenced to this pin. Connect directly to system ground and to the negative terminals of CIN and COUT.
2 IN power_in Unregulated input supply pin (VIN). Operating range 2.5V to 60V (absolute max -0.3 to 65V). Decouple with a 1.0μF or larger low-ESR capacitor placed as close as possible to the pin.
3 OUT power_out Regulated 12V output (VOUT) capable of sourcing up to 150mA (400mA absolute max). Dropout is 500mV at 50mA (for the 3.3V option). Requires a 1.0μF or larger output capacitor (10μF recommended) with good frequency characteristics for stability.

Key specifications

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

CAD (KiCad official)

  • Symbol: CJ88120
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: cj88120-etched.step / cj88120-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj88120.step / cj88120.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cj88120.step 57 KB You want the bare part, or you mark your own boards.
cj88120-etched.step 1.3 MB You want the part with CJ88120 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 341 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 (8 pp, sha256 c2050774e448f2b1, 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