# LM78L05MK

**HGSEMI** · Linear Voltage Regulators (LDO) · SOT-89

LM78L05MK from HGSEMI, in a SOT-89. 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 5 V output (4.8 to 5.2 V at TJ = 25°C), delivering up to 100 mA output current. |
| 2 | GND | power_in | Ground reference pin for input and output, which is also connected to the package tab shown in the connection diagram. |
| 3 | VIN | power_in | Unregulated DC input with a maximum rating of 30 V for the 5 V version (VO = 3.3 to 10 V) and a recommended 7 to 20 V for regulation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOT-89 |
| Category | Power Supply Chip |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `LM78L05MK`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `lm78l05mk-etched.step` / `lm78l05mk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm78l05mk.step` / `lm78l05mk.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](docs/lm78l05mk-datasheet.pdf) (15 pp, sha256 `7f48909ec1217a36`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/lm78l05mk-datasheet.pdf)