# LR78L15A

**LRC** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

LR78L15A from LRC, 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 | Output | power_out | Regulated fixed 15V output of the LR78L15A, rated for output current up to 100mA per the datasheet features. |
| 2 | GND | power_in | Common ground reference pin of the regulator; the datasheet states no separate electrical limit for this pin. |
| 3 | Input | power_in | Unregulated input supply, with an absolute maximum input voltage of 35V for the 12V to 24V output versions, which covers the 15V part. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| 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 (Tj=25C) | VO | 14.4 | 15 | 15.6 | V | Tj=25C | 3 |
| Output Voltage | VO | 14.25 |  | 15.75 | V | 17.5V<=VI<=30V, IO=1mA~40mA | 3 |
| Load Regulation | Vo |  | 45 | 150 | mV | Tj=25C, IO=1mA~100mA | 3 |
| Load Regulation | Vo |  | 30 | 75 | mV | Tj=25C, IO=1mA~40mA | 3 |
| Line Regulation | Vo |  | 30 | 300 | mV | 17.5V<=VI<=30V, Tj=25C | 3 |
| Line Regulation | Vo |  | 15 | 250 | mV | 20V<=VI<=30V, Tj=25C | 3 |
| Quiescent Current | Iq |  | 2.2 | 6 | mA | IO=0mA, Tj=25C | 3 |
| Quiescent Current Change | Iq |  |  | 1.5 | mA | 20V<=VI<=30V | 3 |
| Quiescent Current Change | Iq |  |  | 0.1 | mA | 1mA<=IO<=40mA | 3 |
| Ripple Rejection | RR |  | 33 | 39 | dB | 18.5V<=VI<=28.5V, f=120Hz, Tj=25C | 3 |
| Dropout Voltage | Vd |  | 1.7 |  | V |  | 3 |
| Output Noise Voltage | VN |  | 90 |  | V | 10Hz<=f<=100kHz, Tj=25C | 3 |
| Temperature Coefficient of Vo | Vo/T |  | 1.3 |  | mV/C | Io=5mA | 3 |
| Input Voltage (for Vo=12~24V) | VI |  |  | 35 | V | Vo=12~24V | 1 |
| Output Current | Io |  |  | 100 | mA |  | 1 |
| Power Dissipation (SOT-89) | PD |  |  | 500 | mW | SOT-89 | 1 |
| Operating Ambient Temperature | TOPR | -40 |  | 125 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 1 |
| Operating Junction Temperature | TJ |  |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `LR78L15A`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `lr78l15a-etched.step` / `lr78l15a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr78l15a.step` / `lr78l15a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945214408953856) (6 pp, sha256 `a49a118b686fea89`, retrieved 2026-10-09, 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/lr78l15a-datasheet.pdf)