component
MD8240A
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMD8240A
Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3
MD8240A 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 reference for the regulator, which must be wired with low impedance, and the output capacitor should be placed close to the VOUT-GND pins. |
| 2 | VIN | power_in | Regulator input supply with an absolute maximum of -0.3 to 45 V and 40 V maximum input for regulated output, requiring an input capacitor of 1.0 uF or more. |
| 3 | VOUT | power_out | Regulated 4.0 V output (MD8240, 3.88 to 4.12 V) with 150 mA rated load and about 300 mA typical current limit, which must not exceed VIN+0.3 V and needs an output capacitor of 2.2 uF or more. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shanghai Mingda Microelectronics |
| Package | SOT-89-3 |
| Category | Power Management ICs |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MD8240A - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
md8240a-etched.step/md8240a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);md8240a.step/md8240a.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 2026-10-27, 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).