component

CJA1117B-3.3

Public Unreviewed

by Ray

Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiccja1117b-3.3
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Symbol & Footprint

Schematic Symbol

Open full view ↗

PCB Footprint

Open full view ↗
Contents

README

markdown

CJA1117B-3.3

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

CJA1117B-3.3 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 / adjust reference pin. On the fixed 3.3V version this pin is the device ground return; internally tied to the reference divider (labeled ADJ/GND on the package).
2 OUTPUT power_out Regulated 3.3V output. Delivers up to 1A. Requires a 22 uF tantalum (or equivalent) output capacitor for stability per the typical application circuit.
3 IN power_in Unregulated input supply. Recommended operating input voltage up to 15V (absolute max 20V). For a 3.3V output, VIN must be at least 4.8V for full load regulation. A 10 uF tantalum input capacitor is recommended.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • CJA1117B-3.3

The extractor listed these alongside CJA1117B-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • CJA1117B-ADJ
  • CJA1117B-1.8
  • CJA1117B-2.5
  • CJA1117B-5.0

CAD (KiCad official)

  • Symbol: CJA1117B-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cja1117b-3-3.step 57 KB You want the bare part, or you mark your own boards.
cja1117b-3-3-etched.step 1.4 MB You want the part with CJA1117B-3.3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 384 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 fc47d4c515190804, 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