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CJT1117B-3.3

Public Made by Adom

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Jiangsu Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. 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 cjt1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
viewers cjt1117b-3-3: footprint pads join the pin-hover bus with the symbol (4 pads) · Ray
cjt1117b-3-3-etched.fit.json cjt1117b-3-3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cjt1117b-3-3-etched.glb cjt1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
cjt1117b-3-3-etched.step cjt1117b-3-3: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray
cjt1117b-3-3.glb Publish 0.1.0 · Ray
cjt1117b-3-3.kicad_mod courtyard follows the body and pads (63.36 -> 55.31 mm2, 12 vertices) · Ray
cjt1117b-3-3.kicad_sym Publish 0.1.0 · Ray
cjt1117b-3-3.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
cjt1117b-3-3.step Publish 0.1.0 · Ray
package.json Publish 0.2.3 · 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 0.2.3 · Ray
README.md cjt1117b-3-3: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CJT1117B-3.3

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

CJT1117B-3.3 from Jiangsu, in a SOT-223. Pinout and pin descriptions extracted from the 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 CJT1117B-3.3 (fixed version) this pin is the device ground return; on the ADJ variant the same pin functions as the ADJ feedback node.
2 OUTPUT power_out Regulated 3.3V output (3.234V-3.366V over line/load, 10 mA ≤ IOUT ≤ 1 A). Requires a 22 µF tantalum output capacitor for stability per the typical application circuit.
3 IN power_in Unregulated input supply. Recommended operating input ≤15 V, absolute max 20 V; requires ≥1.5 V headroom above VOUT (VIN ≥ 4.8 V for the 3.3 V variant). A 10 µF tantalum input capacitor is recommended.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • CJT1117B-3.3

CAD (KiCad official)

  • Symbol: CJT1117B-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: cjt1117b-3-3-etched.step / cjt1117b-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cjt1117b-3-3.step / cjt1117b-3-3.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cjt1117b-3-3.step 64 KB You want the bare part, or you mark your own boards.
cjt1117b-3-3-etched.step 1.8 MB You want the part with CJT1117B-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: 447 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: Jiangsu datasheet (8 pp, sha256 1aa5012256f1d788, 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