MC78M12BDTRKG

@@ -0,0 +1,45 @@+# MC78M12BDTRKG++**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DPAK-3++MC78M12BDTRKG 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 input voltage. Recommended operating input for 12 V variant is 14.5 V to 30 V; absolute maximum input is 35 V (V_I ≤ 18 V rated devices) with the 12 V part characterized at V_I = 19 V. A 0.33 µF input bypass capacitor to ground is recommended when the regulator is located far from the supply filter. |+| 2 | GND | power_in | Common ground reference for both the input and output. On the DPAK-3 (DT suffix) package the heatsink tab (terminal 4) is internally connected to Pin 2, so the thermal pad is at ground potential and may be soldered directly to a ground copper pour for heat dissipation. |+| 3 | VO | power_out | Regulated +12 V output. Typical V_O = 12 V (11.50 V min / 12.50 V max at T_J = 25 °C for the B-grade). Maximum output current with adequate heatsinking is 500 mA; short-circuit current limit is typically 350 mA and peak output current typically 700 mA. A 0.1 µF output capacitor to ground is recommended to improve transient response. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | DPAK-3 |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `MC78M12BDTRKGDTRKG`+- `MC78M12BDTRKGDT`+- `MC78M12BDTRKGT`+- `MC78M12BDTRKGTG`++## CAD (KiCad official)++- Symbol: `MC78M12BDTRKG`+- Footprint: `Package_TO_SOT_SMD:TO-252-2`+- 3D model: DPAK-3 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mc78m12bdtrk-d.pdf) (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](docs/mc78m12bdtrkg-datasheet.pdf)

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