# PJ78M09TE

**PJSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

PJ78M09TE from PJSEMI, in a TO-252. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN | power_in | Unregulated positive supply input. Accepts up to 35V absolute maximum; a 0.33μF ceramic bypass capacitor to GND is recommended close to the pin for stability. |
| 2 | GND | power_in | Ground/common reference for both input and output. Also connected to the exposed tab of the TO-252 package for thermal dissipation. |
| 3 | OUT | power_out | Regulated +9V output, capable of up to 0.5A (typ. 350mA test condition). Requires a 0.1μF ceramic bypass capacitor to GND for transient response; typical short-circuit current is 50mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PJSEMI |
| Package | TO-252 |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `PJ78M09TE`

## CAD (KiCad official)

- Symbol: `PJ78M09TE`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `pj78m09te-etched.step` / `pj78m09te-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pj78m09te.step` / `pj78m09te.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PJSEMI datasheet](docs/pj78m09te-datasheet.pdf) (4 pp, sha256 `ddc34df32e6db9d8`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/pj78m09te-datasheet.pdf)