# GN78M05A

**GN Semic** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

GN78M05A from GN Semic, in a TO-252-2. 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 pin; the absolute maximum input voltage is 35 V (VI). |
| 2 | GND | power_in | Ground pin; the datasheet gives no further functional description for this pin. |
| 3 | OUT | power_out | Regulated 5 V output, rated for up to 0.5 A maximum output current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GN Semic |
| Package | TO-252-2 |
| 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 | VO | 4.9 | 5 | 5.1 | V | TJ=25℃ | 2 |
| Output Voltage | VO | 4.8 | 5 | 5.2 | V | Vi=7V-20V Io=5mA~350mA | 2 |
| Load Regulation | ΔVo |  |  | 100 | mV | Io=5mA-500mA TJ=25℃ | 2 |
| Load Regulation | ΔVo |  |  | 50 | mV | Io=5mA~200mA TJ=25℃ | 2 |
| Line Regulation | ΔVo |  |  | 100 | mV | Vi=7V~25V TJ=25℃ | 2 |
| Line Regulation | ΔVo |  |  | 50 | mV | Vi=8V~25V TJ=25℃ | 2 |
| Ripple Rejection | RR | 62 |  |  | dB | Vi=8V~18V f=120Hz | 2 |
| Quiescent Current | IQ |  |  | 6 | mA | TJ=25℃ | 2 |
| Quiescent Current Change | ΔIQ |  |  | 0.8 | mA | Vi=8V~25V | 2 |
| Quiescent Current Change | ΔIQ |  |  | 0.5 | mA | Io=5mA~350mA | 2 |
| Input Voltage | VI |  |  | 35 | V |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Temperature Range | TOPR | -40 |  | 125 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  | 100 |  | ℃/W |  | 1 |
| Thermal Resistance Junction-Case | RθJC |  | 8 |  | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `GN78M05A`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files: `gn78m05a-etched.step` / `gn78m05a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gn78m05a.step` / `gn78m05a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GN Semic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588918498374389760) (4 pp, sha256 `530765d043a2cf30`, retrieved 2026-10-18, 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/gn78m05a-datasheet.pdf)