# MD8353A

**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · SOT-89-3

MD8353A from Shanghai Mingda Microelectronics, in a SOT-89-3. 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 | GND | power_in | Ground pin of the 83XXA pinout variant (pin 1 is GND, whereas the non-A variant puts VOUT here). |
| 2 | VIN | power_in | Input supply pin, operating range 2.2V to 40V (absolute maximum 45V), with a recommended input capacitor of 1.0µF or more placed close to the IC. |
| 3 | VOUT | power_out | Regulated output pin delivering up to 300mA, with a recommended output capacitor of 1.0µF or more, and must not exceed VIN+0.3V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3 |
| Category | Power Supply Chip |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `MD8353A`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `md8353a-etched.step` / `md8353a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md8353a.step` / `md8353a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md8353a-datasheet.pdf) (10 pp, sha256 `0505673b2c0a2133`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/md8353a-datasheet.pdf)