# 78L05 SOT89

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

78L05 SOT89 from KTP, 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 5 V output of the regulator, rated for up to 100 mA output current (IOUT 100 mA absolute maximum). |
| 2 | GND | power_in | Common ground reference pin for the regulator, with the input and output voltages referenced to this pin. |
| 3 | IN | power_in | Unregulated supply input to the regulator, with a maximum input voltage rating of 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KTP |
| 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 | 4.8 | 5 | 5.2 | V | Tj=25℃ | 1 |
| Output voltage | Vo | 4.75 | 5 | 5.25 | V | 1.0mA  Io  40mA, PD  15W | 1 |
| Voltage regulation | Regline |  |  | 150 | mV | VI=7V to 20V, Vo=7V to 20V | 1 |
| Voltage regulation | Regline |  |  | 100 | mV | Vi=8V to 20V, Tj=25℃ | 1 |
| Load regulation | Regload |  |  | 60 | mV | Io=1.0mA to 100mA, Tj=25℃ | 1 |
| Load regulation | Regload |  |  | 30 | mV | Io=1.0mA to 40mA, Tj=25℃ | 1 |
| Quiescent current | IQ |  |  | 5.5 | mA | Tj=25℃ | 1 |
| Quiescent current change | IQ |  |  | 0.1 | mA | Io=1.0mA to 40mA | 1 |
| Quiescent current change | IQ |  |  | 1.5 | mA | Tj=25℃, Vi=8V to 20V | 1 |
| Output voltage temperature coefficient | V/T |  | 0.65 |  | mV/℃ | Io=5mA | 1 |
| Output noise voltage | VNO |  |  | 40 | V | f=10Hz~100kHz, Tj=25℃ | 1 |
| Ripple rejection | RR | 40 | 49 |  | dB | Vi=8~18V, f=120Hz | 1 |
| Dropout voltage | Vdrop |  | 1.7 |  | V | Io=100mA, Tj=25℃ | 1 |
| Input voltage | VIN |  |  | 30 | V |  | 1 |
| Output current | IOUT |  |  | 100 | mA |  | 1 |
| Junction temperature | TJ |  |  | 125 | ℃ |  | 1 |
| Storage temperature | TSTG | -40 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `78L05 SOT89`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `78l05-sot89-etched.step` / `78l05-sot89-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `78l05-sot89.step` / `78l05-sot89.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KTP datasheet](docs/78l05-sot89-datasheet.pdf) (1 pp, sha256 `d8b47560db6b1476`, retrieved 2026-10-28, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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/78l05-sot89-datasheet.pdf)