# UA78L12ACDR

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

UA78L12ACDR from Texas Instruments, 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 | OUTPUT | output | 12 V regulated output pin with maximum output current of 100 mA requiring 0.1 µF output capacitor placed close to OUT and GND pins. |
| 2 | COMMON | power_in | Ground reference pin. |
| 3 | COMMON | power_in | Ground reference pin. |
| 4 | NC | unconnected | No connect pin not connected internally; may be connected to ground for thermal performance or left floating. |
| 5 | NC | unconnected | No connect pin not connected internally; may be connected to ground for thermal performance or left floating. |
| 6 | COMMON | power_in | Ground reference pin. |
| 7 | COMMON | power_in | Ground reference pin. |
| 8 | INPUT | input | Input pin accepting 14.5 V to 27 V with 0.33 µF input capacitor placed close to IN and GND pins for stability. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `UA78L12ACDR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ua78l12acdr-etched.step` / `ua78l12acdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ua78l12acdr.step` / `ua78l12acdr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ua78l) (47 pp, sha256 `223d628010f1d8e3`, retrieved 2026-09-24, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-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/ua78l12acdr-datasheet.pdf)