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CJ7533S

Public Made by Adom

by adom

Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. 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 cj7533s: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers cj7533s: viewers · Ray
cj7533s-etched.fit.json cj7533s: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cj7533s-etched.glb cj7533s: one-pass backfill (re-etched) · Ray
cj7533s-etched.step cj7533s: one-pass backfill (re-etched) · Ray
cj7533s-hero.glb Publish 0.2.3 · Ray
cj7533s-hero.overlay.json Publish 0.2.3 · Ray
cj7533s.glb Publish 0.1.0 · Ray
cj7533s.kicad_mod Publish 0.1.0 · Ray
cj7533s.kicad_sym Publish 0.1.0 · Ray
cj7533s.lbr Publish 0.1.0 · Ray
cj7533s.step Publish 0.1.0 · Ray
package.json Publish 0.2.3 · Ray
page.json cj7533s: model_3d_plain back to the plain GLB (pkg publish re-declared the etched one) · Ray
README.md cj7533s: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CJ7533S

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

CJ7533S from Changjing, in a SOT-89-3. 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. Common return for input and output; tie to the system ground plane. Also serves as the exposed SOT-89 heat-sink tab for thermal dissipation.
2 IN power_in Unregulated input supply, VIN. Operating range 2.5 V to 36 V (absolute max 40 V). Bypass to GND with ≥1 µF ceramic or tantalum for stability and PSRR.
3 OUT power_out Regulated 3.3 V output, VOUT. Sources up to 300 mA (600 mA absolute max). Requires ≥1 µF ceramic or tantalum output capacitor to GND for stability and transient response.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • CJ7533SS

CAD (KiCad official)

  • Symbol: CJ7533S
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: cj7533s-etched.step / cj7533s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj7533s.step / cj7533s.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cj7533s.step 57 KB You want the bare part, or you mark your own boards.
cj7533s-etched.step 1.2 MB You want the part with CJ7533S already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 311 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 (6 pp, sha256 d76ea5eea44dc63d, 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