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CJ78M05 3%

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

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CJ78M05 3%

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

CJ78M05 3% from Changjing, in a TO-252. 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 to the device; the absolute maximum input voltage is 35 V, and the datasheet recommends not exceeding 17 V in surge-prone circuits, with a 0.33 µF CIN placed as close as possible to the IN and GND pins.
2 GND power_in Regulator ground, which is the network ground reference for all voltages in the datasheet and should be the return point for CIN and COUT.
3 OUT output Output of the regulator, rated up to 500 mA at TJ = 25°C with a recommended 0.1 µF COUT between OUT and GND (not to exceed 20 µF).

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-252
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 (VIN = 7 to 20V, IOUT = 5 to 350mA) VOUT 4.75 5 5.25 V VIN = 7 to 20V, IOUT = 5 to 350mA 7
Output voltage VOUT 4.85 5 5.15 V 7
Line regulation (VIN = 7 to 25V, IOUT = 200mA) LNR 3 100 mV VIN = 7 to 25V, IOUT = 200mA 7
Line regulation (VIN = 8 to 25V, IOUT = 200mA) LNR 1 50 mV VIN = 8 to 25V, IOUT = 200mA 7
Load regulation (IOUT = 5 to 500mA) LDR 15 100 mV IOUT = 5 to 500mA 7
Load regulation (IOUT = 5 to 200mA) LDR 5 50 mV IOUT = 5 to 200mA 7
Quiescent current IQ 4.2 6 mA 7
Quiescent current change (VIN = 8 to 25V, IOUT = 200mA) ∆IQ 0.8 mA VIN = 8 to 25V, IOUT = 200mA 7
Quiescent current change (IOUT = 5 to 350mA) ∆IQ 0.5 mA IOUT = 5 to 350mA 7
Output noise voltage VN 40 200 μV f = 10 to 100kHz 7
Ripple rejection RR 62 80 dB VIN = 8 to 18V, IOUT = 300mA, f = 120Hz 7
Dropout voltage VD 2 2.5 V IOUT = 350mA 7
Operating junction temperature TJ -40 125 °C 5
Maximum input voltage VIN 35 V 5
Maximum junction temperature TJ Max 150 °C 5
Storage temperature Tstg -65 150 °C 5
Soldering temperature Tsolder 260 °C 10s 5
Junction-to-ambient thermal resistance (TO-252-2L) RΘJA 80 °C/W TO-252-2L, still air, TA = 25°C, 1 in² FR-4 with 2 oz copper 6
Junction-to-case thermal resistance (TO-252-2L) RΘJC 6 °C/W TO-252-2L 6
Reference maximum power dissipation (TO-252-2L) PD Ref 1.25 W TO-252-2L 6

CAD (KiCad official)

  • Symbol: CJ78M05 3%
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: cj78m05-3-etched.step / cj78m05-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj78m05-3.step / cj78m05-3.glb are the bare package body.

Provenance

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

  • Datasheet: Changjing datasheet (26 pp, sha256 12af2a83111652a5, retrieved 2026-10-19, 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