# CJ75L033S

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

CJ75L033S from Changjing, in a SOT-89-3L. 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 | OUT | power_out | Regulated 3.3V output, up to 300 mA. Requires an output capacitor between OUT and GND, placed as close to the pin as possible for best transient response. |
| 2 | GND | power_in | Regulator ground reference. On SOT-89 this pin is fused to the die-pad tab and should be tied to a large ground copper for thermal dissipation. |
| 3 | IN | power_in | Unregulated input supply, 2.5V to 36V. Place a 1µF (or larger) input capacitor as close as possible to IN and GND to minimize input impedance and improve transient response. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-89-3L |
| Category | PMIC |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `CJ75L033S`
- `CJ75L05S`
- `CJ75LC0S`

## CAD (KiCad official)

- Symbol: `CJ75L033S`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `cj75l033s-etched.step` / `cj75l033s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj75l033s.step` / `cj75l033s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/cj75l033s-datasheet.pdf) (36 pp, sha256 `c4e87b13b4aa0863`, 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/cj75l033s-datasheet.pdf)