# PJ73AL36SC

**PJSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3

PJ73AL36SC from PJSEMI, in a SOT-23-3. 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; input and output capacitor ground connections must use as wide and as short a copper trace as practical. |
| 2 | VOUT | power_out | Regulated output voltage; a minimum 10µF ceramic output capacitor (X7R or X5R) is required, placed as close as possible to VOUT and GND. |
| 3 | VIN | power_in | Power input; rated up to 20V in recommended operation (absolute maximum supply voltage -0.3 to +22V), with a 1µF ceramic input capacitor placed close to the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PJSEMI |
| Package | SOT-23-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN |  |  | 20 | V |  | 7 |
| Output Voltage Accuracy | ΔVOUT | -2 |  | 2 | % | IOUT=10mA | 7 |
| Max. Output Current | IOUT | 300 |  |  | mA |  | 7 |
| Quiescent Current | IQ |  | 1.5 | 3 | μA | IOUT=0mA | 7 |
| Dropout Voltage | VDROP |  | 180 | 300 | mV | 3.6V≤VOUT<4.0V, IOUT=100mA | 7 |
| Line Regulation | ΔVLINE |  |  | 0.2 | %/V | VIN=VOUT+2 to20V, IOUT=1mA | 7 |
| Load Regulation | ΔVLOAD |  | 37 | 100 | mV | 1mA<IOUT<300mA | 7 |
| Supply Voltage (absolute maximum) |  | -0.3 |  | 22 | V |  | 6 |
| Power Dissipation SOT-23-3 |  |  |  | 200 | mW | Package SOT-23-3 | 6 |
| Operating Ambient Temperature (absolute maximum) |  | -40 |  | 85 | °C |  | 6 |
| Storage temperature range |  | -50 |  | 125 | °C |  | 6 |
| ESD Voltage HBM |  |  |  | 2 | KV | HBM | 6 |
| Supply Voltage (recommended) |  |  |  | 20 | V |  | 6 |
| Maximum Output Current (recommended) |  |  |  | 300 | mA |  | 6 |
| Operating Ambient Temperature (recommended) |  | -40 |  | 85 | °C |  | 6 |
| Maximum Operating Junction Temperature | TJ(MAX) |  |  | 125 | ℃ |  | 8 |
| Thermal Resistance, Junction-to-Ambient SOT-23-3 |  |  | 500 |  | °C/W | Junction-to-ambient, SOT-23-3 | 6 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | must be back to the PJ73A Series ground pin using as wide and as short of a copper trace as is practical.Connections | 8 |

## CAD (KiCad official)

- Symbol: `PJ73AL36SC`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `pj73al36sc-etched.step` / `pj73al36sc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pj73al36sc.step` / `pj73al36sc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PJSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604428325662715904) (12 pp, sha256 `e1adf868e7c0ea91`, 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/pj73al36sc-datasheet.pdf)