# LM79L08F

**HTC Korea TAEJIN Tech** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

LM79L08F from HTC Korea TAEJIN Tech, 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 | GND | power_in | Ground reference pin of the regulator (datasheet pin table lists it as GND for both TO-92 and SOT-89). |
| 2 | VIN | power_in | Negative input voltage; for the LM79L08 the recommended input range is -10.5 V to -23 V, with an absolute maximum of -30 V for the LM79L05 to LM79L09 group. |
| 3 | VOUT | power_out | Regulated negative output voltage (-8 V nominal for the LM79L08), capable of delivering up to 100 mA of output current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| 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 (25°C) | VOUT | -7.7 | -8 | -8.3 | V | 25°C; 1mA ≤ Io ≤ 40mA; -10.5V ≤ VIN ≤ -23V | 6 |
| Output Voltage (over temperature) | VOUT | -7.6 | -8 | -8.4 | V | -30°C ~ 125°C; 1mA ≤ Io ≤ 40mA; -10.5V ≤ VIN ≤ -23V | 6 |
| Output Voltage (over temperature, 70mA) | VOUT | -7.6 | -8 | -8.4 | V | -30°C ~ 125°C; 1mA ≤ Io ≤ 70mA | 6 |
| Line Regulation | ΔVLINE |  | 20 | 175 | mV | 25°C; -10.5V ≤ VIN ≤ -23V | 6 |
| Line Regulation | ΔVLINE |  | 12 | 125 | mV | -11V ≤ VIN ≤ -23V | 6 |
| Load Regulation | ΔVLOAD |  | 18 | 80 | mV | 25°C; 1mA ≤ Io ≤ 100mA | 6 |
| Load Regulation | ΔVLOAD |  | 9 | 42 | mV | 1mA ≤ Io ≤ 40mA | 6 |
| Bias Current (25°C) | IB |  |  | 6.5 | mA | 25°C | 6 |
| Bias Current (125°C) | IB |  |  | 6 | mA | 125°C | 6 |
| Bias Current Change | ΔIB |  |  | 1.5 | mA | -11V ≤ VIN ≤ -23V; -30°C ~ 125°C | 6 |
| Bias Current Change | ΔIB |  |  | 0.1 | mA | 1mA ≤ Io ≤ 40mA | 6 |
| Output Noise Voltage | VN |  |  | 60 | uV | 10Hz ≤ f ≤ 100kHz; 25°C | 6 |
| Ripple Rejection | RR | 42 | 49 |  | dB | -12V ≤ VIN ≤ -23V, f=120Hz; 25°C | 6 |
| Dropout Voltage | VD |  |  | 1.7 | V | 25°C | 6 |
| Input Voltage (LM79L05 ~ LM79L09 group, applies to LM79L08) | VIN |  |  | -30 | V | LM79L05 ~ LM79L09 | 1 |
| Lead Temperature (Soldering, 10 sec) | TSOL |  |  | 260 | °C | 10 sec soldering | 1 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 1 |
| Operating Junction Temperature Range | TJOPR | -40 |  | 125 | °C |  | 1 |
| Input Voltage (LM79L08) | VIN | -10.5 |  | -23 | V | LM79L08 | 2 |
| Output Current | Io |  |  | 100 | mA |  | 2 |
| Operating Junction Temperature | TJ | -40 |  | 125 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `LM79L08F`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `lm79l08f-etched.step` / `lm79l08f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm79l08f.step` / `lm79l08f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTC Korea TAEJIN Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945186356908032) (11 pp, sha256 `36eda69d402fb29e`, 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/lm79l08f-datasheet.pdf)