# MT3608B

**Aerosemi** · DC-DC Converters · SOT-23-6

MT3608B from Aerosemi, in a SOT-23-6. 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 | SW | output | Power Switch Output (MOSFET drain) connected to power inductor and output rectifier; voltage swing 0V to 27V. |
| 2 | GND | power_in | Ground reference pin. |
| 3 | FB | input | Feedback Input with 0.6V reference voltage; connect resistor divider to control output voltage. |
| 4 | EN | input | Enable/Disable Control Input; high enables converter, low disables it; connect to VIN for automatic startup when unused. |
| 5 | VIN | power_in | Input Supply Pin; operating range 2.5V to 24V; must be locally bypassed. |
| 6 | NC | unconnected | No Connect; no internal connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Aerosemi |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `MT3608B`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `mt3608b-etched.step` / `mt3608b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mt3608b.step` / `mt3608b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Aerosemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590906262861127680) (8 pp, sha256 `f61bb3a3f618a0b6`, retrieved 2026-09-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/mt3608b-datasheet.pdf)