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cjt1117b-1-8

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

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docs cjt1117b-1-8: 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-1-8: viewers · Ray
cjt1117b-1-8-etched.fit.json cjt1117b-1-8: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cjt1117b-1-8-etched.glb cjt1117b-1-8: 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-1-8-etched.step cjt1117b-1-8: 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-1-8.glb Publish 0.1.0 · Ray
cjt1117b-1-8.kicad_mod Publish 0.1.0 · Ray
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package.json Publish 0.1.0 · Ray
page.json cjt1117b-1-8: 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
README.md cjt1117b-1-8: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

CJT1117B-1.8

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

CJT1117B-1.8 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 return for the regulator. On the fixed-voltage CJT1117B-1.8 variant this pin is the device ground reference (labeled ADJ/GND on the package; the ADJ function is used only on the -ADJ variant). Tie directly to system ground.
2 OUTPUT power_out Regulated 1.8V output (1.764V-1.836V over line/load, 10mA-1A). Requires a >=22uF tantalum output capacitor to ground for stability. The SOT-223 tab (pin 4) is internally connected to this OUTPUT pin.
3 IN power_in Unregulated input supply, 3.3V to 12V for the -1.8 variant (absolute max 20V). Bypass with a 10uF tantalum capacitor to ground close to the pin.
4 OUTPUT power_out SOT-223 thermal tab, internally connected to the OUTPUT pin (pin 2). Should be soldered to a copper pour tied to VOUT for heatsinking (RθJA = 100 °C/W).

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-223
Category PMIC
Pins 4

Ordering variants

  • CJT1117B-1.8

CAD (KiCad official)

  • Symbol: CJT1117B-1.8
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: cjt1117b-1-8-etched.step / cjt1117b-1-8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cjt1117b-1-8.step / cjt1117b-1-8.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Changjing datasheet (None pp, sha256 a86693ffbb7cce0d, 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