component

CJA1117B-5.0

Public Unreviewed

by Ray

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

componentpmiccja1117b-5.0
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3D Model

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Symbol & Footprint

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Contents

README

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CJA1117B-5.0

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

CJA1117B-5.0 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 reference for the fixed 5.0V regulator variant. On the adjustable variant this pin is labeled ADJ and connects to the external resistor divider setting VOUT.
2 OUTPUT power_out Regulated 5.0V output (4.9V to 5.1V over line/load). Supplies up to 1A continuous output current. Requires a 22uF tantalum output capacitor for stability.
3 IN power_in Unregulated input supply. Recommended operating range up to 15V (absolute max 20V). For 5.0V output requires VIN >= ~6.5V (dropout 1.15V typ at 1A). Bypass with 10uF tantalum.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • CJA1117B-5.0

The extractor listed these alongside CJA1117B-5.0, but they are different parts with different electrical characteristics. Do not order them as substitutes.

  • CJA1117B-5.0ADJ
  • CJA1117B-5.01.8
  • CJA1117B-5.02.5
  • CJA1117B-5.03.3

CAD (KiCad official)

  • Symbol: CJA1117B-5.0
  • 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-5-0.step 57 KB You want the bare part, or you mark your own boards.
cja1117b-5-0-etched.step 1.3 MB You want the part with CJA1117B-5.0 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 368 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 (4 pp, sha256 3bc76780b2acd26c, 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