component

MC78M09CDTRKG

Public Unreviewed

by Ray

onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, DPAK-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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MC78M09CDTRKG

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DPAK-3

MC78M09CDTRKG from onsemi, in a DPAK-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VI power_in Unregulated positive supply input. Recommended operating range 11.5 V to 25 V for the 9 V variant; absolute maximum 35 V. An input bypass capacitor (typ. 0.33 uF) is recommended when the regulator is located far from the filter capacitor.
2 GND power_in Common ground reference for both input and output. Also electrically tied to the exposed heatsink tab (terminal 4) of the DPAK package, so the PCB pad must handle thermal dissipation as well as ground return.
3 VO power_out Regulated 9 V positive output, 500 mA maximum with adequate heatsinking (typ. 9.0 V, min 8.64 V, max 9.45 V at TJ = 25 C). An output capacitor (typ. 0.1 uF) improves transient response; internal short-circuit current limit is ~350 mA at VI = 35 V, peak output ~700 mA.
4 TAB power_in Exposed metal heatsink tab on the back of the DPAK-3 package. Internally connected to Pin 2 (GND). Solder to a copper pour for thermal dissipation; theta-JA is ~92 C/W (DT suffix) and theta-JC is 5.0 C/W.

Key specifications

Parameter Value
Manufacturer onsemi
Package DPAK-3
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • MC78M09CDTRKG
  • MC78M09CDTRKGTG
  • MC78M09CDTRKGT

CAD (KiCad official)

  • Symbol: MC78M09CDTRKG
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: DPAK-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
mc78m09cdtrkg.step 119 KB You want the bare part, or you mark your own boards.
mc78m09cdtrkg-etched.step 2.1 MB You want the part with MC78M09CDTRKG already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 545 faces against 83 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: onsemi datasheet (15 pp, sha256 2339bbc0a38dcd3b, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF