# KIA7912PI-U

**KEC Semicon** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220F

KIA7912PI-U from KEC Semicon, in a TO-220F. 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 | GND | power_in | Ground reference pin of the -12V regulator. |
| 2 | INPUT | power_in | Negative input voltage pin; absolute maximum VIN is -35 V, with VIN = -18 V used for the electrical characteristics. |
| 3 | OUTPUT | power_out | Regulated -12 V output (-12.5 V min to -11.5 V max at Tj=25C), providing output current in excess of 1.0 A with internal short-circuit limiting (typ. 1.9 A). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEC Semicon |
| Package | TO-220F |
| 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 | VOUT | -12.5 | -12 | -11.5 | V | Tj=25℃ | 3 |
| Output Voltage | VOUT | -12.6 | -12 | -11.4 | V | -27V≤VIN≤-15.5V, 5mA≤IOUT≤1.0A | 3 |
| Input Regulation (Reg line) | Reg line |  | 6 | 120 | mV | Tj=25℃, -22V≤VIN≤-16V | 3 |
| Input Regulation (Reg line) | Reg line |  | 12 | 240 | mV | Tj=25℃, -30V≤VIN≤-14.5V | 3 |
| Load Regulation (Reg load) | Reg load |  | 12 | 240 | mV | Tj=25℃, 5mA≤IOUT≤1.5A | 3 |
| Load Regulation (Reg load) | Reg load |  | 4 | 120 | mV | Tj=25℃, 250mA≤IOUT≤750mA | 3 |
| Quiescent Current | IB |  | 3 | 6 | mA | Tj=25℃ | 3 |
| Quiescent Current Change (Line) | IBI |  | 0.1 | 1 | mA | -30V≤VIN≤-15V | 3 |
| Quiescent Current Change (Load) | IBO |  | 0.05 | 0.5 | mA | 5mA≤IOUT≤1.0A | 3 |
| Ripple Rejection Ratio | RR | 54 | 60 |  | dB | f=120Hz, IOUT=20mA | 3 |
| Input Voltage | VIN | -35 |  |  | V |  | 1 |
| Power Dissipation-1 | PD1 |  |  | 2 | W | No heatsink | 1 |
| Power Dissipation-2 | PD2 |  |  | 20.8 | W | Infinite heatsink | 1 |
| Operating Junction Temperature | Tj | -30 |  | 150 | °C |  | 1 |
| Operating Temperature | Topr | -30 |  | 75 | °C |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `KIA7912PI-U`
- Footprint: `Package_TO_SOT_THT:TO-220F-3_Vertical`
- 3D model: TO-220F (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [KEC Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588897178911301632) (5 pp, sha256 `8b0e09401e58c716`, retrieved 2026-11-06, 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/kia7912pi-u-datasheet.pdf)