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CJ78L12C-P3T-ARG

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

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CJ78L12C-P3T-ARG

Changjing · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L

CJ78L12C-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 output Output of the regulator, rated for up to 100mA output current with a fixed 12V output for the CJ78L12C.
2 GND power_in Regulator ground.
3 IN input Input to the device; the maximum input voltage for the CJ78L12C is 35V and the recommended input range is 14.5 to 27V.

Key specifications

Parameter Value
Manufacturer Changjing
Package SOT-89-3L
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
Output voltage (TJ = 25°C, ±3% grade) VOUT 11.64 12 12.36 V TJ = 25°C, ±3% grade 12
Output voltage (over line, load and temperature) VOUT 11.4 12 12.6 V VIN = 14.5 to 27V, TJ = -40 to 125°C, IOUT = 1 to 100mA, PD ≤ 0.75W 12
Output current IOUT 100 mA TJ = 25°C 12
Quiescent current IQ 3 6 mA IOUT = 0mA 12
Quiescent current change (line) ΔIQ 1.5 mA VIN = 16 to 27V, TJ = -40 to 125°C 12
Quiescent current change (load) ΔIQ 0.1 mA IOUT = 1 to 40mA, TJ = -40 to 125°C 12
Dropout voltage VDO 1.7 2 V IOUT = 40mA 12
Dropout voltage VDO 1.8 2.3 V IOUT = 100mA 12
Line regulation ΔVLINE 20 250 mV VIN = 14.5 to 27V 12
Load regulation ΔVLOAD 20 100 mV IOUT = 1 to 100mA 12
Ripple rejection RR 37 42 dB VIN = 15 to 25V, f = 120Hz 12
Input voltage VIN 35 V 12
Operating junction temperature TJ -40 125 °C 6
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 Tsolder 260 °C 10s 6
Junction-to-ambient thermal resistance (SOT-89-3L) RΘJA 121.6 °C/W Still air, TA = 25°C, 1 in² FR-4 board, 2 oz copper 7
Junction-to-case thermal resistance (SOT-89-3L) RΘJC 29.4 °C/W Still air, TA = 25°C, 1 in² FR-4 board, 2 oz copper 7
Reference maximum power dissipation for continuous operation (SOT-89-3L) PD Ref 0.82 W Still air, TA = 25°C, 1 in² FR-4 board, 2 oz copper 7

CAD (KiCad official)

  • Symbol: CJ78L12C-P3T-ARG
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: cj78l12c-p3t-arg-etched.step / cj78l12c-p3t-arg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj78l12c-p3t-arg.step / cj78l12c-p3t-arg.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (31 pp, sha256 796e71efc59e8ce7, retrieved 2026-10-17, 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