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SCJA1117B-1.8-A

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Changjing Linear Voltage Regulators (LDO), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SCJA1117B-1.8-A

Changjing · Linear Voltage Regulators (LDO) · SOT-89-3L

SCJA1117B-1.8-A from Changjing, in a SOT-89-3L. 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 ADJ/GND power_in Adjust pin on the ADJ version (reference for the R1/R2 divider setting VOUT = 1.25×(1+R2/R1)+IAdj×R2) and ground on fixed-voltage versions such as the 1.8V SCJA1117B-1.8-A.
2 OUTPUT power_out Regulated output (1.8V fixed for this part, ±2% accuracy) that needs a minimum 10µF tantalum capacitor for stability and transient response, with up to 1A load current.
3 IN power_in Unregulated input voltage, recommended maximum 15V (absolute maximum 20V), with a 10µF bypass capacitor recommended.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-89-3L
Category Power Supply Chip
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
Output Voltage VO 1.764 1.8 1.836 V IOUT=10mA, VIN=3.8V 3
Output Voltage (over line and load) VO 1.755 1.8 1.845 V 10mA≤IOUT≤1A, 3.3V≤VIN≤12V 3
Line Regulation LNR 0.03 0.2 %/V IOUT=10mA, 1.5V≤VIN-VOUT≤7V 3
Load Regulation LDR 9 36 mV VIN-VOUT=1.5V, 10mA≤IOUT≤1A 3
Quiescent Current Iq 2 5 mA VIN=10V 3
Input Voltage (recommended) Vi 15 V 2
Operating Junction Temperature Tj -40 125 ℃ 2
Operating Ambient Temperature TA -40 85 ℃ 2
Input Voltage (absolute maximum) Vi 20 V Ta=25℃ 2
Maximum Junction Temperature Tj -40 150 ℃ Ta=25℃ 2
Storage Temperature Tstg -40 150 ℃ Ta=25℃ 2
Lead Temperature TL 260 ℃ Soldering, 10s 2
ESD Rating HBM HBM 8 kV Human Body Model 2
Thermal Resistance Junction to Ambient RθJA 250 ℃/W 2
Dropout Voltage VD 1.3 V IOUT=1A 3
Ripple Rejection RR 60 dB f=1kHz, CIN=10μF/25V, COUT=10μF/25V, VIN-VOUT=2V, IOUT=10mA 3
Output Voltage Temperature Coefficient 100 ppm/°C under 100 ppm/°C 4
Thermal Shutdown Junction Temperature 170 °C junction temperature larger than 170°C 4

CAD (KiCad official)

  • Symbol: SCJA1117B-1.8-A
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: scja1117b-1-8-a-etched.step / scja1117b-1-8-a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); scja1117b-1-8-a.step / scja1117b-1-8-a.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (10 pp, sha256 9e29bb0e82977bca, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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