MC7812BTG

@@ -0,0 +1,47 @@+# MC7812BTG++**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220AB++MC7812BTG from onsemi, in a TO-220AB. 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 | VIN | power_in | Unregulated positive input voltage. Must remain typically 2.0 V above VOUT even at the ripple minimum; absolute max input for Case 936 is 35 V. A 0.33 uF input capacitor is recommended if the regulator is far from the bulk supply filter. |+| 2 | GND | power_in | Common ground shared between input and output returns. The exposed heatsink tab of the D2PAK-3 (Case 936) package is electrically bonded to this pin. |+| 3 | VOUT | power_out | Regulated +12 V output (nominal, MC7812 variant). Delivers >1.0 A with adequate heatsinking; internally current-limited and thermally protected. An output capacitor (<0.1 uF may cause instability; ~0.1 uF or larger recommended) improves transient response. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | TO-220AB |+| Category | PMIC |+| Pins | 3 |++## Ordering variants++- `MC7812BTGT`+- `MC7812BTGTG`+- `MC7812BTGD2T`+- `MC7812BTGBTG`+- `MC7812BTGDT`+- `MC7812BTGDTRK`++## CAD (KiCad official)++- Symbol: `MC7812BTG`+- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`+- 3D model: TO-220AB (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mc7812bt-d.pdf) (31 pp, sha256 `92281b28af847a90`, 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/mc7812btg-datasheet.pdf)

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