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SCJU1117B-3.3

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Changjing Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SCJU1117B-3.3

Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2L

SCJU1117B-3.3 from Changjing, in a TO-252-2L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND / ADJ power_in Ground reference for the fixed-voltage versions, and the ADJ pin on the adjustable version, where the output is set by external resistors R1 and R2.
2 OUTPUT power_out Regulated output of the 3.3V fixed version, with dropout of 1.3V at 1A output current and trimmed current limit.
3 IN power_in Unregulated input supply; the absolute maximum input voltage is 20V and the recommended maximum is 15V.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-252-2L
Category Power Management (PMIC)
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage (absolute maximum) Vi 20 V 2
Maximum Junction Temperature TJ -40 150 ℃ 2
Storage Temperature Tstg -40 150 ℃ 2
Operating Ambient Temperature TA -40 85 ℃ 2
ESD Voltage (Machine Model) VESD 250 V Machine Model 2
Lead Temperature (Soldering) TL 260 ℃ Soldering, 10 s 2
Input Voltage (recommended) Vi 15 V 2
Operating Junction Temperature TJ -40 125 ℃ 2
Thermal Resistance from Junction to Ambient RθJA 80 ℃/W 2
Output Voltage VO 3.251 3.3 3.35 V 3
Output Voltage VO 3.234 3.3 3.366 V 3
Dropout Voltage VD 1.3 V ΔVREF=1%, IOUT=1.0A 3
Minimum Load Current 5 10 μA 3
Quiescent Current Iq 1.7 5 mA VIN≤10V, TJ=25℃ (table note) 3
Ripple Rejection 60 70 dB f=10kHz, COUT=22μF Tantalum, VIN-VOUT=3V, IOUT=1A 3
Long-Term Stability 0.3 % TA=125℃, 1000h 3
RMS Output Noise (% of VOUT) 0.003 % TA=25℃, 10Hz≤f≤10kHz 3
Thermal Shutdown Hysteresis 25 ℃ 3

CAD (KiCad official)

  • Symbol: SCJU1117B-3.3
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2L (KiCad packages3D, STEP)
  • 3D model files: scju1117b-3-3-etched.step / scju1117b-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); scju1117b-3-3.step / scju1117b-3-3.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (9 pp, sha256 9e03a4b61bf18ec4, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF