# LM78L05A

**HTC Korea TAEJIN Tech** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92-3

LM78L05A from HTC Korea TAEJIN Tech, in a TO-92-3. 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 of the LM78L05A, rated for up to 100mA output current (Io 100mA max). |
| 2 | GND | power_in | Ground reference pin for the regulator. |
| 3 | VIN | power_in | Unregulated input voltage; recommended 7V to 20V for the LM78L05, with absolute maximum input voltage of 30V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| Package | TO-92-3 |
| 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℃, 1mA ≤ Io ≤ 40mA) | VOUT | 4.9 | 5 | 5.1 | V | 25℃; 1mA ≤ Io ≤ 40mA | 5 |
| Output voltage (1mA ≤ Io ≤ 40mA, 7V ≤ VIN ≤ 20V) | VOUT | 4.875 | 5 | 5.125 | V | 1mA ≤ Io ≤ 40mA; 7V ≤ VIN ≤ 20V (Note 2) | 5 |
| Output voltage (1mA ≤ Io ≤ 70mA, over temperature) | VOUT | 4.875 | 5 | 5.125 | V | 1mA ≤ Io ≤ 70mA; -30℃ ~ 125℃ (Note 2) | 5 |
| Line regulation | ΔVLINE |  | 32 | 150 | mV | 7V ≤ VIN ≤ 20V | 5 |
| Line regulation (25℃) | ΔVLINE |  | 26 | 100 | mV | 8V ≤ VIN ≤ 20V; 25℃ | 5 |
| Load regulation | ΔVLOAD |  | 15 | 60 | mV | 1mA ≤ Io ≤ 100mA | 5 |
| Load regulation (25℃) | ΔVLOAD |  | 8 | 30 | mV | 1mA ≤ Io ≤ 40mA; 25℃ | 5 |
| Quiescent (bias) current, 25℃ | IB |  | 3.8 | 6 | mA | 25℃ | 5 |
| Quiescent (bias) current, 125℃ | IB |  |  | 5.5 | mA | 125℃ | 5 |
| Bias current change (line) | ΔIB |  |  | 1.5 | mA | 9V ≤ VIN ≤ 20V | 5 |
| Bias current change (load) | ΔIB |  |  | 0.1 | mA | 1mA ≤ Io ≤ 40mA; -30℃ ~ 125℃ | 5 |
| Ripple rejection | RR | 41 | 49 |  | dB | 8V ≤ VIN ≤ 18V, f=120Hz; 25℃ | 5 |
| Output noise voltage | VN |  | 42 |  | uV | 10Hz ≤ f ≤ 100kHz; 25℃ | 5 |
| Dropout voltage | VD |  | 1.7 |  | V | 25℃ | 5 |
| Input voltage (recommended operating) | VIN | 7 |  | 20 | V | LM78L05 / LM78L05A | 2 |
| Output current | Io | 100 |  | 100 | mA |  | 2 |
| Operating virtual junction temperature | TJ | -40 |  | 125 | ℃ |  | 2 |
| Input voltage (absolute maximum) | VIN |  |  | 30 | V | LM78L05 ~ LM78L10 | 1 |
| Maximum power dissipation | PDMax |  |  | 0.77 | W | TO-92; TA = 25℃ | 1 |
| Thermal resistance junction-to-ambient | θJA |  |  | 162 | ℃/W | TO-92 | 1 |
| Lead temperature (soldering, 10 sec) | TSOL |  |  | 260 | ℃ | 10 sec | 1 |
| Storage temperature range | TSTG | -65 |  | 150 | ℃ |  | 1 |
| Operating junction temperature range (absolute maximum) | TJOPR | -40 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `LM78L05A`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files: `lm78l05a-etched.step` / `lm78l05a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm78l05a.step` / `lm78l05a.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/8588892403993858048) (11 pp, sha256 `b5b1ed6d19d1619d`, 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/lm78l05a-datasheet.pdf)