# PJ9400L33SC

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

PJ9400L33SC 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 for the regulator; the input decoupling capacitor and output capacitor must be placed close to the device VIN, OUT and GND pins. |
| 2 | VOUT | power_out | Regulated output voltage, rated for up to 400mA (Maximum Output Current 400mA, Maximum Load Current 450mA absolute maximum) and requires a 1uF to 10uF output capacitor with ESR of 5mΩ to 500mΩ. |
| 3 | VIN | power_in | Power input voltage, with a recommended supply range of 1.5V to 8V (absolute maximum -0.3V to +9V) and a 1uF ceramic input capacitor recommended to GND. |

## 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 | 1.5 |  | 8 | V |  | 6 |
| Output Voltage Accuracy | ∆VOUT | -2 |  | 2 | % | IOUT=1mA | 6 |
| Shut-down Current | ISHDN |  |  | 1 | µA | VEN=0V | 6 |
| Line Regulation | ∆VLINE |  |  | 0.15 | % | VIN=2.7V~5.5V,IOUT=1mA | 6 |
| EN Input Current | IEN |  |  | 1 | µA | VEN= 0~ 5.5V | 6 |
| EN Input Threshold Logic Low | VIL |  |  | 0.4 | V | VIN=5.5V, VOUT=0V | 6 |
| EN Input Threshold Logic High | VIH | 1.2 |  |  | V | VIN=5.5V, IOUT=1mA | 6 |
| Input Voltage (absolute maximum) | VIN | -0.3 |  | 9 | V |  | 5 |
| Maximum Load Current |  |  |  | 450 | mA |  | 5 |
| Power Dissipation SOT-23-3 |  |  |  | 400 | mW |  | 5 |
| Thermal Resistance, Junction-to-Ambient SOT-23-3 |  |  |  | 400 | °C/W |  | 5 |
| Operating Ambient Temperature (absolute maximum table) |  | -40 |  | 85 | °C |  | 5 |
| Junction Temperature |  | -40 |  | 125 | °C |  | 5 |
| Storage Temperature Range |  | -55 |  | 150 | °C |  | 5 |
| Lead Temperature |  |  |  | 260 | °C | 10 s | 5 |
| ESD Voltage HBM |  |  |  | 3.5 | KV | HBM | 5 |
| Supply Voltage |  | 1.5 |  | 8 | V |  | 5 |
| Maximum Output Current |  |  |  | 400 | mA |  | 5 |
| Operating Ambient Temperature (recommended) |  | -40 |  | 85 | °C |  | 5 |

## CAD (KiCad official)

- Symbol: `PJ9400L33SC`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `pj9400l33sc-etched.step` / `pj9400l33sc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pj9400l33sc.step` / `pj9400l33sc.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/8604437833793097728) (13 pp, sha256 `46c58006ad5a20c6`, 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/pj9400l33sc-datasheet.pdf)