# L79L12ACD13TR

**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOIC-8

L79L12ACD13TR from STMicroelectronics, in a SOIC-8. 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 | VOUT | power_out | Regulated negative output voltage of the L79L12AC regulator, nominal -12 V, delivering up to 100 mA. |
| 2 | VIN | power_in | Unregulated negative DC input voltage to the regulator; this pin is internally commoned to pins 3, 6, 7 and to the die-attach flag for improved thermal dissipation. |
| 3 | VIN | power_in | Unregulated negative DC input voltage to the regulator; this pin is internally commoned to pins 2, 6, 7 and to the die-attach flag for improved thermal dissipation. |
| 4 | NC | unconnected | Not internally connected. |
| 5 | GND | power_in | Ground/common reference pin for the regulator. |
| 6 | VIN | power_in | Unregulated negative DC input voltage to the regulator; this pin is internally commoned to pins 2, 3, 7 and to the die-attach flag for improved thermal dissipation. |
| 7 | VIN | power_in | Unregulated negative DC input voltage to the regulator; this pin is internally commoned to pins 2, 3, 6 and to the die-attach flag for improved thermal dissipation. |
| 8 | NC | unconnected | Not internally connected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `L79L12ACD13TR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `l79l12acd13tr-etched.step` / `l79l12acd13tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l79l12acd13tr.step` / `l79l12acd13tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603144984699166720) (23 pp, sha256 `bcf5edf4ea53f137`, retrieved 2026-09-29, tier: lcsc)
- **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/l79l12acd13tr-datasheet.pdf)