component
MD8240
Public Made by Adomby adom
Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MD8240
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3
MD8240 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 | VOUT | power_out | Regulated output (4.0V ±3% for MD8240, 300mA typ. current limit); keep VOUT no higher than VIN+0.3V and place the 2.2µF or larger output capacitor close to this pin. |
| 2 | GND | power_in | Ground pin; wire VIN, VOUT and GND traces for low impedance. |
| 3 | VIN | power_in | Input supply, absolute maximum -0.3 to 45V and 40V maximum operating input, with a 1.0µF or larger input capacitor recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MD8240 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
md8240-etched.step/md8240-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md8240.step/md8240.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shanghai Mingda Microelectronics datasheet (10 pp, sha256
bd4aefd613b0a967, retrieved 2026-10-23, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).
# MD8240
**Shanghai Mingda Microelectronics** · Linear Voltage Regulators (LDO) · SOT-89-3
MD8240 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 | VOUT | power_out | Regulated output (4.0V ±3% for MD8240, 300mA typ. current limit); keep VOUT no higher than VIN+0.3V and place the 2.2µF or larger output capacitor close to this pin. |
| 2 | GND | power_in | Ground pin; wire VIN, VOUT and GND traces for low impedance. |
| 3 | VIN | power_in | Input supply, absolute maximum -0.3 to 45V and 40V maximum operating input, with a 1.0µF or larger input capacitor recommended. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| Pins | 3 |
## CAD (KiCad official)
- Symbol: `MD8240`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `md8240-etched.step` / `md8240-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `md8240.step` / `md8240.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md8240-datasheet.pdf) (10 pp, sha256 `bd4aefd613b0a967`, retrieved 2026-10-23, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/md8240-datasheet.pdf)