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CJ78M09

Public Made by Adom

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

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
viewers cj78m09: viewers · Ray 1mo ago
cj78m09-etched.glb cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
cj78m09-etched.step cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
cj78m09-hero.glb cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
cj78m09-hero.overlay.json cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
cj78m09.glb Publish 0.1.0 · Ray 1mo ago
cj78m09.kicad_mod Publish 0.1.0 · Ray 1mo ago
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package.json cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
page.json cj78m09: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain STEP) · Ray 25d ago
README.md cj78m09: specified limits as data (metadata.characteristics, 20 rows from the datasheet) · Ray 25d ago

CJ78M09

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

CJ78M09 from Changjing, in a TO-252-2(DPAK). 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 power_in Unregulated input to the regulator, with an absolute maximum input voltage of 35 V; a 0.33 µF input capacitor Ci is recommended, placed as close to the regulator as possible.
2 GND power_in Common ground reference for the regulator, to which the input and output capacitors should be returned.
3 OUT power_out Regulated 9 V output (8.55 V to 9.45 V over 11.5 V to 24 V input and 5 mA to 350 mA load), with a 0.1 µF output capacitor Co recommended and a maximum output current of 0.5 A.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-252-2(DPAK)
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 VO 8.73 9 9.27 V 1
Output Voltage VO 8.55 9 9.45 V 11.5≤Vi≤24V, Io=5mA-350mA 1
Load Regulation ΔVo 20 180 mV Io=5mA-500mA 1
Load Regulation ΔVo 10 90 mV Io=5mA-200mA 1
Line Regulation ΔVo 6 100 mV 11.5V≤Vi≤26V, Io=200mA 1
Line Regulation ΔVo 2 50 mV 12V≤Vi≤26V, Io=200mA 1
Quiescent Current Iq 4.6 6 mA 1
Quiescent Current Change ΔIq 0.8 mA 11.5V≤Vi≤26V, Io=200mA 1
Quiescent Current Change ΔIq 0.5 mA 5mA≤IO≤350mA 1
Ripple Rejection RR 56 80 dB 13≤Vi≤23V, f=120Hz, Io=300mA 1
Output Noise Voltage VN 60 μV 10Hz≤f≤100KHz 1
Dropout Voltage Vd 2 V Io=350mA 1
Short Circuit Current Isc 250 mA Vi=16V 1
Peak Current Ipk 0.5 A 1
Input Voltage Vi 35 V 1
Thermal Resistance from Junction to Ambient RθJA 80 ℃/W 1
Operating Junction Temperature Range TOPR -40 125 ℃ 1
Storage Temperature Range TSTG -65 150 ℃ 1
Continuous Total Dissipation (features) PD 1.25 W 1
Maximum Output Current (features) IOM 0.5 A 1

CAD (KiCad official)

  • Symbol: CJ78M09
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
  • 3D model files: cj78m09-etched.step / cj78m09-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj78m09.step / cj78m09.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (5 pp, sha256 78ed41af6e78898c, retrieved 2026-10-09, 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