# L7812ABD2T

**Tokmas** · Linear Voltage Regulators (LDO) · TO-263

L7812ABD2T from Tokmas, in a TO-263. 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 | Input | power_in | Unregulated input voltage; the datasheet gives an input voltage maximum of 35 V for 5 V to 18 V outputs and 40 V for the 24 V output. |
| 2 | Ground | power_in | Common ground reference pin, which is also electrically connected to the heatsink surface. |
| 3 | Output | power_out | Regulated output voltage; this 7812 variant is rated for an output current up to 1.5 A with thermal overload and short-circuit protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Tokmas |
| Package | TO-263 |
| Category | Power Management ICs |
| 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 | Vo | 11.5 | 12 | 12.5 | V | Tj=25℃ | 5 |
| Output voltage | Vo | 11.4 | 12 | 12.6 | V | 5.0mA<Io<1.0A, PD <15W; Vi=14.5V to 27V | 5 |
| Line regulation | Vo |  | 10 | 240 | mV | Tj=25℃,Vi=14.5V to 30V | 5 |
| Line regulation | Vo |  | 3 | 120 | mV | Tj=25℃,Vi=16V to 22V | 5 |
| Load regulation | Vo |  | 12 | 240 | mV | Tj=25℃,Io=5.0mA to 1.5A | 5 |
| Load regulation | Vo |  | 5 | 120 | mV | Tj=25℃,Io=250mA to 750mA | 5 |
| Quiescent current | IQ |  | 5.1 | 8 | mA | Tj=25℃ | 5 |
| Quiescent current change | IQ |  |  | 0.5 | mA | Io=5mA to 1.0A | 5 |
| Quiescent current change | IQ |  |  | 0.8 | mA | Vi=15V to 30V | 5 |
| Ripple rejection | RR | 53 | 64 |  | dB | f=120Hz, Vi=15V to 25V | 5 |
| Input voltage (for Vo=5V to 18V) | Vi |  |  | 35 | V |  | 2 |
| Operating temperature | Topr | -40 |  | 125 | ℃ |  | 2 |
| Storage temperature | Tstg | -65 |  | 150 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `L7812ABD2T`
- Footprint: `Package_TO_SOT_SMD:TO-263-2`
- 3D model: TO-263 (KiCad packages3D, STEP)
- 3D model files: `l7812abd2t-etched.step` / `l7812abd2t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l7812abd2t.step` / `l7812abd2t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Tokmas datasheet](docs/l7812abd2t-datasheet.pdf) (9 pp, sha256 `e61ea90b8763d6ec`, retrieved 2026-10-27, 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](docs/l7812abd2t-datasheet.pdf)