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CJ78M12E-TFN-ARG

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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.

componentpower management (pmic)cj78m12e-tfn-argfactory-2.0.0extractor-text

Verified CJ78M12E-TFN-ARG

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier lcsc, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: CJ78M12E-TFN-ARG · TO-252-2L · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 29-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: TO-252-2
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-b2km5v_w/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.26)
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ cj78m12e-tfn-arg.kicad_sym✓ cj78m12e-tfn-arg.kicad_mod✓ cj78m12e-tfn-arg.step
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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

markdown

CJ78M12E-TFN-ARG

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

CJ78M12E-TFN-ARG 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 IN input Input voltage pin; the absolute maximum input voltage (VIN) is 35 V with respect to network ground.
2 GND power_in Ground pin.
3 OUT output Output voltage pin; this device is the fixed 12 V output version of the CJ78M00E series.

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
Output voltage (±2% grade, TJ = 25°C) VOUT 11.76 12 12.24 V TJ = 25°C, ±2% grade 10
Output voltage (over line and load) VOUT 11.4 12 12.6 V VIN = 14.5 to 26V, IOUT = 5 to 350mA 10
Line regulation LNR 10 100 mV VIN = 14.5 to 30V, IOUT = 200mA 10
Line regulation LNR 4 50 mV VIN = 16 to 30V, IOUT = 200mA 10
Load regulation LDR 25 240 mV IOUT = 5 to 500mA 10
Load regulation LDR 10 120 mV IOUT = 5 to 200mA 10
Quiescent current IQ 3.3 6 mA 10
Quiescent current change ΔIQ 0.8 mA VIN = 14.5 to 30V, IOUT = 200mA 10
Quiescent current change ΔIQ 0.5 mA IOUT = 5 to 350mA 10
Maximum input voltage VIN 35 V 3
Maximum junction temperature TJ Max 150 °C 3
Storage temperature Tstg -65 150 °C 3
Soldering temperature Tsolder 260 °C 10 s 3
Operating junction temperature TJ -40 125 °C 3
Output noise voltage VN 75 μV f = 10 to 100kHz 10
Ripple rejection RR 66 dB VIN = 15 to 25V, IOUT = 300mA, f = 120Hz 10
Dropout voltage VD 2 V IOUT = 350mA 10
Short circuit current ISC 320 mA VIN = 19V, OUT short to GND 10
Peak current IPeak 0.9 A 10
Junction-to-ambient thermal resistance (TO-252-2L) RΘJA 80 °C/W 4
Reference maximum power dissipation for continuous operation (TO-252-2L) PD Ref 1.25 W 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing polyester resin. The cover tape is a multilayer film (Hear Activated Adhesive in nature) primarily composed of polyester film, 28

CAD (KiCad official)

  • Symbol: CJ78M12E-TFN-ARG
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2L (KiCad packages3D, STEP)
  • 3D model files: cj78m12e-tfn-arg-etched.step / cj78m12e-tfn-arg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj78m12e-tfn-arg.step / cj78m12e-tfn-arg.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (29 pp, sha256 590bf746101b9297, retrieved 2026-11-05, 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