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CJ78L09C-P3T-ARG

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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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CJ78L09C-P3T-ARG

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

CJ78L09C-P3T-ARG 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 OUT power_out Output of the regulator, fixed 9.0V (±3% at TJ = 25°C) delivering at least 100mA; a 0.1µF output capacitor to GND is recommended and should not exceed 20µF.
2 GND power_in Regulator ground.
3 IN power_in Input to the device, maximum input voltage 30V for the 9.0V output (absolute maximum 36V); a 0.33µF input capacitor is recommended.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-89-3L
Category Power Management
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 (±3% grade) VOUT 8.73 9 9.27 V TJ = 25°C, VIN = 16V, IOUT = 40mA 11
Output voltage over temperature VOUT 8.55 9 9.45 V VIN = 12 to 24V, IOUT = 1 to 100mA, TJ = -40 to 125°C, PD ≤ 0.75W 11
Input voltage VIN 30 V 11
Output current IOUT 100 mA TJ = 25°C 11
Quiescent current IQ 3 5.5 mA IOUT = 0mA 11
Quiescent current change (VIN) ΔIQ 1.5 mA VIN = 13 to 24V, TJ = -40 to 125°C 11
Quiescent current change (IOUT) ΔIQ 0.1 mA IOUT = 1 to 40mA, TJ = -40 to 125°C 11
Dropout voltage VDO 1.7 2 V IOUT = 40mA 11
Dropout voltage VDO 1.8 2.3 V IOUT = 100mA 11
Line regulation ΔVLINE 8 150 mV VIN = 12 to 24V 11
Load regulation ΔVLOAD 10 70 mV IOUT = 1 to 100mA 11
Ripple rejection RR 42 51 dB VIN = 15 to 25V, f = 120Hz 11
Output voltage temperature coefficient ΔVOUT / ΔT 0.7 mV/°C IOUT = 5mA 11
Output voltage temperature coefficient ΔVOUT / (VOUT × ΔT) 84 ppm/°C IOUT = 5mA 11
Output noise voltage VN 65 µV f = 10 to 100k Hz 11
Maximum input voltage VIN MAX 36 V 6
Maximum junction temperature TJ Max 150 °C 6
Storage temperature Tstg -65 150 °C 6
Soldering temperature & time Tsolder 260 °C 260°C, 10s 6
Input voltage range VIN 30 V CJ78L09C 6
Operating junction temperature TJ -40 125 °C 6
Junction-to-ambient thermal resistance RΘJA 121.6 °C/W SOT-89-3L 7
Junction-to-case thermal resistance RΘJC 29.4 °C/W SOT-89-3L 7
Reference maximum power dissipation for continuous operation PD Ref 0.82 W SOT-89-3L 7
ESD human body model VESD-HBM 2000 V 7
ESD machine model VESD-MM 200 V 7

CAD (KiCad official)

  • Symbol: CJ78L09C-P3T-ARG
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: cj78l09c-p3t-arg-etched.step / cj78l09c-p3t-arg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj78l09c-p3t-arg.step / cj78l09c-p3t-arg.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (30 pp, sha256 ccb056fb5d1abe3f, 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