# MC7812BDTRKG

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

MC7812BDTRKG from onsemi, in a TO-252-2(DPAK). 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 | Input | power_in | Unregulated positive input supply. Must remain approximately 2.0 V above the +12 V output (dropout ~2.0 V typ.) and not exceed 35 Vdc absolute max. A 0.33 uF ceramic input capacitor is required if the device is located an appreciable distance from the supply filter. |
| 2 | Ground | power_in | Device common / ground reference. A common ground is required between the input and output sides of the regulator. On the DPAK-3 (DT SUFFIX, CASE 369C) package the heatsink tab (drawn as terminal 4) is internally connected to pin 2 (Ground). |
| 3 | Output | power_out | Regulated +12 V positive output, capable of delivering >1.0 A with internal short-circuit and thermal protection. An output capacitor (Co) is not strictly required for stability but improves transient response; values <0.1 uF may cause instability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-252-2(DPAK) |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `MC7812BDTRKG`
- `MC7812BDTRKGD2TG`
- `MC7812BDTRKGD2TR4G`
- `MC7812BDTRKGTG`
- `MC7812BDTRKGBTG`

## 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 (TJ = 25°C) | VO | 11.5 | 12 | 12.5 | Vdc | TJ = 25°C | 9 |
| Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W) | VO | 11.4 | 12 | 12.6 | Vdc | 14.5 Vdc ≤ Vin ≤ 27 Vdc | 9 |
| Line Regulation, TJ = 25°C | Regline |  | 7.5 | 240 | mV | TJ = 25°C; 14.5 Vdc ≤ Vin ≤ 30 Vdc | 9 |
| Line Regulation, TJ = 25°C | Regline |  | 2.2 | 120 | mV | TJ = 25°C; 16 Vdc ≤ Vin ≤ 22 Vdc | 9 |
| Load Regulation, TJ = 25°C | Regload |  | 1.6 | 240 | mV | TJ = 25°C; 5.0 mA ≤ IO ≤ 1.5 A | 9 |
| Quiescent Current | IB |  | 3.4 | 8 | mA |  | 9 |
| Quiescent Current Change | IB |  |  | 1 | mA | 15 Vdc ≤ Vin ≤ 30 Vdc | 9 |
| Quiescent Current Change | IB |  |  | 0.5 | mA | 5.0 mA ≤ IO ≤ 1.0 A | 9 |
| Ripple Rejection | RR |  | 60 |  | dB | 15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz | 9 |
| Dropout Voltage (IO = 1.0 A, TJ = 25°C) | VI − VO |  | 2 |  | Vdc | IO = 1.0 A, TJ = 25°C | 9 |
| Output Noise Voltage (TA = 25°C) | Vn |  | 10 |  | V/VO | 10 Hz ≤ f ≤ 100 kHz, TA = 25°C | 9 |
| Output Resistance | rO |  | 1.1 |  | m | f = 1.0 kHz | 9 |
| Short Circuit Current Limit (TA = 25°C) | ISC |  | 0.2 |  | A | Vin = 35 Vdc, TA = 25°C | 9 |
| Peak Output Current (TJ = 25°C) | Imax |  | 2.2 |  | A | TJ = 25°C | 9 |
| Average Temperature Coefficient of Output Voltage | TCVO |  | -0.8 |  | mV/°C |  | 9 |
| Input Voltage | VI |  |  | 35 | Vdc | Input Voltage (5.0 − 18 V) rating row | 1 |
| Storage Junction Temperature Range | Tstg | -65 |  | 150 | °C |  | 1 |
| Operating Junction Temperature | TJ |  |  | 150 | °C |  | 1 |
| Operating Junction Temperature Range (MC7812BDTRKG) | TJ | -40 |  | 125 | °C | Ordering information for MC7812BDTRKG (DPAK, 2500 / Tape & Reel) | 22 |
| Thermal Resistance, Junction-to-Ambient (DPAK, case 369C) | RJA |  |  | 92 | °C/W | DPAK case 369C column | 1 |
| Thermal Resistance, Junction-to-Case (DPAK, case 369C) | RJC |  |  | 5 | °C/W | DPAK case 369C column | 1 |

## CAD (KiCad official)

- Symbol: `MC7812BDTRKG`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
- 3D model files: `mc7812bdtrkg-etched.step` / `mc7812bdtrkg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc7812bdtrkg.step` / `mc7812bdtrkg.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`mc7812bdtrkg.step`](mc7812bdtrkg.step) | 119 KB | You want the bare part, or you mark your own boards. |
| [`mc7812bdtrkg-etched.step`](mc7812bdtrkg-etched.step) | 2.0 MB | You want the part with `MC7812BDTRKG` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 514 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](https://www.onsemi.com/pdf/datasheet/mc7812bdtrk-d.pdf) (28 pp, sha256 `a0831a3a6a3010ac`, 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/mc7812bdtrkg-datasheet.pdf)