# LM78L08

**KEXIN** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

LM78L08 from KEXIN, 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 | OUT | power_out | Regulated 8 V output; the maximum output current is stated as 0.1 A, and a 0.1 µF output bypass capacitor is recommended close to the regulator. |
| 2 | GND | power_in | Common ground reference pin for the regulator. |
| 3 | IN | power_in | Unregulated input; the absolute maximum input voltage is 30 V, and electrical characteristics are specified for 11 V ≤ VI ≤ 23 V, with a 0.33 µF input bypass capacitor recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEXIN |
| 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 | 1 |
| Output Voltage | VO | 7.6 | 8 | 8.4 | V | TJ = 0 to 125, 10.5V ≤ VI ≤ 23V, IO = 1mA to 40mA | 1 |
| Load Regulation | VO |  | 18 | 80 | mV | TJ = 25, IO = 1mA to 100mA | 1 |
| Load Regulation | VO |  | 10 | 40 | mV | TJ = 25, IO = 1mA to 40mA | 1 |
| Line Regulation | VO |  | 42 | 175 | mV | TJ = 25, 10.5V ≤ VI ≤ 23V | 1 |
| Line Regulation | VO |  | 36 | 125 | mV | TJ = 25, 11V ≤ VI ≤ 23V | 1 |
| Quiescent Current | IQ |  | 4 | 6 | mA | TJ = 25 | 1 |
| Quiescent Current Change | IQ |  |  | 1.5 | mA | TJ = 0 to 125, 11V ≤ VI ≤ 23V | 1 |
| Quiescent Current Change | IQ |  |  | 0.1 | mA | TJ = 0 to 125, 1mA ≤ IO ≤ 40mA | 1 |
| Output Noise Voltage | VN |  | 54 |  | V | TJ = 25, 10Hz ≤ f ≤ 100KHz | 1 |
| Ripple Rejection | RR | 37 | 46 |  | dB | TJ = 0 to 125, 13V ≤ VI ≤ 23V, f = 120Hz | 1 |
| Dropout Voltage | VD |  | 1.7 |  | V | TJ = 25 | 1 |
| Input Voltage | VI |  |  | 30 | V |  | 1 |
| Operating Junction Temperature Range | TOPR | -55 |  | 125 |  |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 |  |  | 1 |
| Continuous Total Dissipation | PD |  |  | 0.5 | W | Ta = 25 | 1 |
| Maximum Output Current | IO |  |  | 0.1 | A |  | 1 |

## CAD (KiCad official)

- Symbol: `LM78L08`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `lm78l08-etched.step` / `lm78l08-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm78l08.step` / `lm78l08.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KEXIN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590166674273312768) (2 pp, sha256 `148ca0f1a891d65a`, 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/lm78l08-datasheet.pdf)