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SCJT1117B-3.3

Public Unreviewed

by Ray

Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SCJT1117B-3.3

Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

SCJT1117B-3.3 from Changjing, in a SOT-223. 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 reference for the fixed-output regulator. On the SCJT1117B-ADJ variant this pin serves as the ADJ feedback input instead; on fixed-voltage parts such as the 3.3V variant it is the device ground return.
2 OUTPUT power_out Regulated 3.3V output. Supplies up to 1A of load current with 1.3V typical dropout. Requires a minimum 10µF tantalum bypass capacitor to ground for transient response and loop stability.
3 IN power_in Unregulated input supply, absolute max 20V (recommended operating max 15V). For the 3.3V variant, VIN must be ≥4.8V at full 1A load. A 10µF bypass capacitor to ground near this pin is recommended.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-223
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • SCJT1117B-3.3

The extractor listed these alongside SCJT1117B-3.3, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • SCJT1117B-3.3-ADJ
  • SCJT1117B-3.3-1.2
  • SCJT1117B-3.3-1.5
  • SCJT1117B-3.3-1.8
  • SCJT1117B-3.3-2.5
  • SCJT1117B-3.3-5.0

CAD (KiCad official)

  • Symbol: SCJT1117B-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
scjt1117b-3-3.step 64 KB You want the bare part, or you mark your own boards.
scjt1117b-3-3-etched.step 2.0 MB You want the part with SCJT1117B-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: 506 faces against 75 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 (10 pp, sha256 66798862ef522525, 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