# BL78L08

**GME(银河微电)** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

BL78L08 from GME(银河微电), in a SOT-89. 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 | VO | power_out | Regulated 8 V output (7.7 V to 8.3 V at Tj=25°C), with a 0.1 µF output capacitor shown in the application circuit and up to 100 mA maximum output current. |
| 2 | GND | power_in | Ground reference for the regulator, common to input and output capacitors. |
| 3 | VI | power_in | Unregulated input voltage, 30 V maximum for BL78L08, with a 0.33 µF input capacitor shown in the application circuit. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GME(银河微电) |
| Package | SOT-89 |
| 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 | 7.7 | 8 | 8.3 | V | Tj=25℃ | 3 |
| Output voltage | VO | 7.6 |  | 8.4 | V | 10.5V≤Vi≤23V, IO=1mA-40mA | 3 |
| Load regulation | Regload |  | 15 | 80 | mV | Tj=25℃, IO=1mA-100mA | 3 |
| Load regulation | Regload |  | 8 | 40 | mV | Tj=25℃, IO=1mA-40mA | 3 |
| Line regulation | Regline |  | 20 | 175 | mV | 10.5V≤Vi≤23V, Tj=25℃ | 3 |
| Line regulation | Regline |  | 12 | 125 | mV | 11V≤Vi≤23V, Tj=25℃ | 3 |
| Input bias current | IIB |  | 3 | 6 | mA | Tj=25℃ | 3 |
| Input bias current | IIB |  |  | 5.5 | mA | Tj=125℃ | 3 |
| Input bias current change | △IIB |  |  | 1.5 | mA | 11V≤Vi≤23V | 3 |
| Input bias current change | △IIB |  |  | 0.1 | mA | 1mA≤IO≤40mA | 3 |
| Ripple rejection | RR | 37 | 57 |  | dB | IO=40mA, 12V≤Vi≤23V, f=120Hz, Tj=25℃ | 3 |
| Input voltage (78L33-78L09 group, applies to BL78L08) | VI |  |  | 30 | V |  | 1 |
| Maximum output current | ICM |  |  | 100 | mA |  | 1 |
| Power dissipation | PD |  |  | 500 | mW | TA = 25C | 1 |
| Thermal resistance junction-to-air | RθJA |  |  | 250 | °C/W |  | 1 |
| Operating temperature range | TOPR | -40 |  | 125 | C |  | 1 |
| Junction temperature | TJ |  |  | 150 | C |  | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | C |  | 1 |

## CAD (KiCad official)

- Symbol: `BL78L08`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `bl78l08-etched.step` / `bl78l08-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bl78l08.step` / `bl78l08.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GME(银河微电) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590921393901023232) (9 pp, sha256 `413a8ece5ac571c9`, retrieved 2026-10-17, 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/bl78l08-datasheet.pdf)