# EG78L05

**EG Micro** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

EG78L05 from EG Micro, in a SOT-89-3. 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 5V output, supplying up to 100mA maximum output current with 4.82V to 5.18V output at Tj=25°C. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | VIN | power_in | Unregulated input voltage; absolute maximum input is 30V minimum rating for 3.3V to 10V output versions, and 7V to 20V is the specified operating input range for the 5V output. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | EG Micro |
| Package | SOT-89-3 |
| 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 | 4.82 | 5 | 5.18 | V | Tj=25°C | 7 |
| Output voltage (line and load range) | Vo | 4.8 |  | 5.2 | V | 7V≤Vi≤20V; Io=1mA~40mA | 7 |
| Output voltage (full range) | Vo | 4.75 |  | 5.25 | V | 7V≤Vi≤Vmax; Io=1mA~70mA | 7 |
| Ripple rejection | RR | 41 | 50 |  | dB | 10V≤Vi≤20V; f=120Hz; Tj=25°C | 7 |
| Quiescent current | Iq |  | 2 | 5.5 | mA |  | 7 |
| Load regulation | ΔVo |  | 11 | 60 | mV | Tj=25°C; Io=1mA~100mA | 7 |
| Load regulation | ΔVo |  | 5 | 30 | mV | Tj=25°C; Io=1mA~40mA | 7 |
| Line regulation | ΔVo |  | 8 | 150 | mV | Tj=25°C; 7V≤Vi≤20V | 7 |
| Line regulation | ΔVo |  | 6 | 100 | mV | Tj=25°C; 8V≤Vi≤20V | 7 |
| Quiescent current change (line) | ΔIq |  |  | 1.5 | mA | 8V≤Vi≤20V | 7 |
| Quiescent current change (load) | ΔIq |  |  | 0.1 | mA | 1mA≤Io≤40mA | 7 |
| Input voltage (absolute maximum) | Vi |  |  | 30 | V | 输出电压 3.3V~10V | 6 |
| Maximum power dissipation | Pd |  |  | 600 | mW | SOT-89 | 6 |
| ESD protection voltage | VESD | 2.7 |  |  | KV |  | 6 |
| Operating ambient temperature | Topr | -25 |  | 125 | ℃ |  | 6 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 6 |
| Dropout voltage | Vd |  | 1.7 |  | V | Tj=25°C | 7 |
| Output voltage temperature drift | ∆Vo/∆T |  | 0.65 |  | mV/°C | Io=5mA | 7 |
| Output noise voltage | VN |  | 40 |  | μV | 10Hz≤f≤100kHz | 7 |

## CAD (KiCad official)

- Symbol: `EG78L05`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `eg78l05-etched.step` / `eg78l05-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `eg78l05.step` / `eg78l05.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [EG Micro datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182461835382784) (9 pp, sha256 `a530a0b16f5bb58e`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/eg78l05-datasheet.pdf)