# LM78L24F

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

LM78L24F 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 | VOUT | power_out | Regulated 24V output of the LM78L24 (nominal 24V); the datasheet rates the output current up to 100mA. |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | VIN | power_in | Unregulated input voltage; for the LM78L24 the absolute maximum input is 40V and the recommended input range is 26.5V to 39V. |

## 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℃) | VOUT | 23 | 24 | 25 | V | 1mA ≤ Io ≤ 40mA; 26.5V ≤ VIN ≤ 39V; 25℃ | 9 |
| Output Voltage (over temperature) | VOUT | 22.8 | 24 | 25.2 | V | 1mA ≤ Io ≤ 40mA; 26.5V ≤ VIN ≤ 39V; -30℃ ~ 125℃ | 9 |
| Output Voltage (Io up to 70mA) | VOUT | 22.8 | 24 | 25.2 | V | 1mA ≤ Io ≤ 70mA | 9 |
| Line Regulation | ΔVLINE |  | 95 | 480 | mV | 26.5V ≤ VIN ≤ 39V; 25℃ | 9 |
| Line Regulation | ΔVLINE |  | 78 | 400 | mV | 29V ≤ VIN ≤ 39V | 9 |
| Load Regulation | ΔVLOAD |  | 41 | 240 | mV | 1mA ≤ Io ≤ 100mA; 25℃ | 9 |
| Load Regulation | ΔVLOAD |  | 28 | 120 | mV | 1mA ≤ Io ≤ 40mA | 9 |
| Bias Current (25℃) | IB |  | 4.8 | 6.5 | mA | 25℃ | 9 |
| Bias Current (125℃) | IB |  |  | 6 | mA | 125℃ | 9 |
| Bias Current Change | ΔIB |  |  | 1.5 | mA | 28V ≤ VIN ≤ 39V; -30℃ ~ 125℃ | 9 |
| Ripple Rejection | RR | 30 | 33 |  | dB | 27.5V ≤ VIN ≤ 37.5V, f=120Hz; 25℃ | 9 |
| Bias Current Change | ΔIB |  | 0.1 |  | mA | 1mA ≤ Io ≤ 40mA | 9 |
| Output Noise Voltage | VN |  | 82 |  | uV | 10Hz ≤ f ≤ 100kHz; 25℃ | 9 |
| Dropout Voltage | VD |  | 1.7 |  | V | 25℃ | 9 |
| Input Voltage (absolute maximum, LM78L24) | VIN |  |  | 40 | V |  | 1 |
| Lead Temperature (soldering, 10 sec) | TSOL |  |  | 260 | ℃ | 10 sec soldering | 1 |
| Storage Temperature Range | TSTG | -65 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJOPR | -40 |  | 150 | ℃ |  | 1 |
| Input Voltage (recommended, LM78L24) | VIN | 26.5 |  | 39 | V | LM78L24 | 2 |
| Output Current | Io |  |  | 100 | mA |  | 2 |
| Operating Virtual Junction Temperature | TJ | -40 |  | 125 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `LM78L24F`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `lm78l24f-etched.step` / `lm78l24f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm78l24f.step` / `lm78l24f.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/8588936533587447808) (11 pp, sha256 `62104aa6d0169a55`, 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/lm78l24f-datasheet.pdf)