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MD7218E33QC3
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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+49@@ -0,0 +1,49 @@+# MD7218E33QC3++**Shanghai Mingda Microelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L++MD7218E33QC3 from Shanghai Mingda Microelectronics, in a SOT-23-5L. 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 | VIN | power_in | Regulator input supply. Operating range 2.2V to 15V (absolute max 15V). Bypass to GND with a 2.2uF (low-ESR ceramic) input capacitor close to the pin. |+| 2 | GND | power_in | Ground reference for the regulator. Typical GND (quiescent) current is 1.6uA at Vout<=5.0V, no load. |+| 3 | EN | input | Enable input. Drive high to enable the regulator, low to shut down. Do not leave floating. |+| 4 | NC | unconnected | No connect. Leave floating or tie to GND per board convention. |+| 5 | VOUT | power_out | Regulated 3.3V output (E33 option), +/-2% accuracy, up to 1A. Requires a 2.2uF low-ESR ceramic output capacitor to GND. Current limit typical 1.5A, short-circuit foldback to ~30mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shanghai Mingda Microelectronics |+| Package | SOT-23-5L |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `MD7218E33QC3QC3`+- `MD7218E33QC3PC1`+- `MD7218E33QC3SF4`+- `MD7218E33QC3PA1`+- `MD7218E33QC3YA2`+- `MD7218E33QC3UA2`++## CAD (KiCad official)++- Symbol: `MD7218E33QC3`+- Footprint: `Package_TO_SOT_SMD:SOT-23-5`+- 3D model: SOT-23-5L (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shanghai Mingda Microelectronics datasheet](docs/md7218e33qc3-datasheet.pdf) (15 pp, sha256 `a1ab1acfaf9f63a7`, retrieved 2026-08-17, 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/md7218e33qc3-datasheet.pdf)
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