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SCJT1117B-3.3-A

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by Ray

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

componentpmicscjt1117b-3.3-a
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Datasheet

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Contents

README

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SCJT1117B-3.3-A

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

SCJT1117B-3.3-A 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 regulator. On the fixed-voltage SCJT1117B-3.3-A variant, pin 1 is the GND (ADJ/GND on the shared pinout diagram). Connect directly to the system ground plane.
2 OUTPUT power_out Regulated 3.3V output (min 3.218 V, typ 3.3 V, max 3.382 V at 10 mA to 1 A). Requires a 10 uF tantalum output capacitor for stability. Rated for up to 1 A continuous output current with 1.3 V typical dropout.
3 IN power_in Unregulated input supply. Operating range 4.8 V to 12 V for the 3.3V variant; 15 V recommended max, 20 V absolute max. Requires a 10 uF tantalum bypass capacitor to ground for stability.
4 OUTPUT power_out SOT-223 heat-slug tab, electrically connected to pin 2 (OUTPUT). Should be soldered to a copper pour on the PCB for heat dissipation; larger copper area lowers thermal resistance from the ~120 C/W bare-die value.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • SCJT1117B-3.3-A

CAD (KiCad official)

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

Provenance

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

  • Datasheet: Changjing datasheet (9 pp, sha256 e8a69a1cac39d505, 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