# L7812CV-HXY

**HXY MOSFET** · Linear Voltage Regulators (LDO) · TO-220

L7812CV-HXY from HXY MOSFET, in a TO-220. 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 voltage pin; absolute maximum input voltage is 35 V, with 14.5V to 27V (up to 30V over temperature) used for the 12 V output specification. |
| 2 | GND | power_in | Ground reference pin common to input and output. |
| 3 | OUT | power_out | Regulated 12 V output (11.5 V to 12.5 V at 25°C) delivering up to 1 A maximum output current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | TO-220 |
| Category | Power Supply Chip |
| 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 | 25℃, Io=5mA-1A, 14.5V≤Vi≤27V | 1 |
| Output Voltage | Vo | 11.4 | 12 | 12.6 | V | -25-125℃, Io=5mA-1A, 14.5V≤Vi≤30V | 1 |
| Load Regulation | ∆Vo |  | 10 | 240 | mV | 25℃ | 1 |
| Load Regulation | ∆Vo |  | 3 | 120 | mV | 25℃, 16V≤Vi≤22V | 1 |
| Line Regulation | ∆Vo |  | 12 | 240 | mV | 25℃, IO=5mA-1.5A | 1 |
| Line Regulation | ∆Vo |  | 4 | 120 | mV | 25℃, IO=250mA-750mA | 1 |
| Quiescent Current | Iq |  | 4.3 | 8 | mA | 25℃ | 1 |
| Quiescent Current Change | ∆Iq |  |  | 0.5 | mA | 5.0mA≤IO≤1.0A, -25-125℃ | 1 |
| Quiescent Current Change | ∆Iq |  |  | 1 | mA | 14.5V≤Vi≤30V, -25-125℃ | 1 |
| Ripple Rejection | RR | 55 | 71 |  | dB | f=120Hz, 15V≤Vi≤25V, -25-125℃ | 1 |
| Output Voltage Drift | ∆Vo/∆T |  | -1 |  | mV/℃ | IO=5mA, -25-125℃ | 1 |
| Output Noise Voltage | VN |  | 75 |  | μV/Vo | f=10Hz to 100KHz, 25℃ | 1 |
| Dropout Voltage | Vd |  | 2 |  | V | IO=1.0A, 25℃ | 1 |
| Output Resistance | RO |  | 18 |  | mΩ | f=1KHz, -25-125℃ | 1 |
| Short Circuit Current | Isc |  | 350 |  | mA | 25℃ | 1 |
| Peak Current | Ipk |  | 2.2 |  | A | 25℃ | 1 |
| Input Voltage | Vi |  |  | 35 | V | Ta=25℃ | 1 |
| Continuous Total Dissipation | PD |  |  | 1.5 | W | Ta=25°C | 1 |
| Operating Junction Temperature Range | TOPR | -25 |  | 125 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -65 |  | 150 | ℃ |  | 1 |
| Thermal Resistance from Junction to Air | RθJA |  | 66.7 |  | ℃/W |  | 1 |
| Maximum output current | IOM |  |  | 1 | A |  | 1 |

## CAD (KiCad official)

- Symbol: `L7812CV-HXY`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `l7812cv-hxy-etched.step` / `l7812cv-hxy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `l7812cv-hxy.step` / `l7812cv-hxy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](docs/l7812cv-hxy-datasheet.pdf) (4 pp, sha256 `c2e038232ddc5c1b`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/l7812cv-hxy-datasheet.pdf)