# L7805

**SY(顺烨)** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220AB

L7805 from SY(顺烨), in a TO-220AB. 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 | IN | power_in | Unregulated input supply to the regulator; the datasheet recommends a 0.33 µF input bypass capacitor (Ci) placed as close to the regulator as possible, but the input voltage limit value is blank in the extracted rating table. |
| 2 | GND | power_in | Common ground reference for the regulator; the datasheet gives no additional limits for this pin. |
| 3 | OUT | power_out | Regulated output with a typical 5.0 V output (4.75 V to 5.25 V over Io = 5 mA to 1 A at 25 °C to -125 °C per the table) and a maximum output current of 1.2 A; a 0.1 µF output capacitor (Co) close to the regulator is recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SY(顺烨) |
| Package | TO-220AB |
| Category | Power Management (PMIC) |
| 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 (Tj 25°C) | Vo | 4.8 | 5 | 5.2 | V | 25°C | 1 |
| Output voltage (Tj -125°C range) | Vo | 4.75 | 5 | 5.25 | V | 7V≤Vi≤20V, Io=5mA-1A, -125°C | 1 |
| Load regulation | ΔVo |  | 9 | 100 | mV | Io=5mA-1.5A, 25°C | 1 |
| Load regulation | ΔVo |  | 4 | 50 | mV | Io=250mA-750mA, 25°C | 1 |
| Line regulation | ΔVo |  | 4 | 100 | mV | 7V≤Vi≤25V, 25°C | 1 |
| Line regulation | ΔVo |  | 1.6 | 50 | mV | 8V≤Vi≤12V, 25°C | 1 |
| Quiescent current | Iq |  | 5 | 8 | mA | 25°C | 1 |
| Quiescent current | Iq |  | 0.3 | 1.3 | mA | 7V≤Vi≤25V, -125°C | 1 |
| Quiescent current change | ΔIq |  | 0.03 | 0.5 | mA | 5mA≤Io≤1A, -125°C | 1 |
| Ripple rejection | RR | 62 | 73 |  | dB | 8V≤Vi≤18V, f=120Hz, -125°C | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | °C |  | 1 |
| Operating junction temperature range | TOPR |  |  | 125 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `L7805`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220AB (KiCad packages3D, STEP)
- 3D model files: `l7805-etched.step` / `l7805-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l7805.step` / `l7805.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SY(顺烨) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590906753599565824) (2 pp, sha256 `21a425e84c4d4de5`, retrieved 2026-10-19, 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/l7805-datasheet.pdf)