# MSDB628

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

MSDB628 from MSKSEMI, in a SOT-23-6. 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 | SW | passive | Switch node; drain of the integrated 80 mΩ power MOSFET, connects to the boost inductor; switches at 1.2 MHz fixed frequency with an internal 4 A current limit. |
| 2 | GND | power_in | Ground reference for the IC; return path for the internal MOSFET and control circuitry. |
| 3 | IN | power_in | Input supply voltage pin; operating range 2.5 V to 24 V; under-voltage lockout protection is included. |
| 4 | FB | input | Feedback pin; connects to an external resistor divider from the output to set the adjustable output voltage (up to 28 V output). |
| 5 | EN | input | Enable input; logic-level signal that enables or shuts down the converter. |
| 6 | NC | unconnected | No internal connection; leave unconnected. |

## Key specifications

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

## 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 range |  | 2.5 |  | 24 | V |  | 2 |
| Output voltage |  |  |  | 28 | V |  | 2 |

## CAD (KiCad official)

- Symbol: `MSDB628`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `msdb628-etched.step` / `msdb628-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msdb628.step` / `msdb628.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604443063574151168) (9 pp, sha256 `096948521e1f7441`, retrieved 2026-10-21, 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/msdb628-datasheet.pdf)