# SY8089A

**TECH PUBLIC** · DC-DC Converters · SOT-23-5

SY8089A from TECH PUBLIC, in a SOT-23-5. 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 | EN | input | Enable control; pull high to turn on and do not float (VIH min 1.1V, VIL max 0.9V). |
| 2 | GND | power_in | Ground pin. |
| 3 | LX | output | Inductor pin; connect to the switching node of the inductor (voltage range -0.3V to VIN+0.3V). |
| 4 | IN | power_in | Input supply pin, 2.5V to 5.5V operating; decouple to GND with at least 22uF ceramic capacitor. |
| 5 | FB | input | Output feedback pin; connect to the center of the output resistor divider to set Vout=0.6*(1+R1/R2). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `SY8089A`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `sy8089a-etched.step` / `sy8089a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sy8089a.step` / `sy8089a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604442967964721152) (7 pp, sha256 `d403761dc2055a80`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/sy8089a-datasheet.pdf)