MD52E33QC3

@@ -0,0 +1,47 @@+# MD52E33QC3++**Shanghai Mingda Microelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L++MD52E33QC3 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 | Input supply pin. Operating range 2.2V to 7.0V (absolute max -0.3V to +8V). Decouple with a low-ESR ceramic capacitor of 1.0µF or greater placed close to the pin. |+| 2 | GND | power_in | Ground reference for the regulator and reference voltage. Also the return path used by the internal output auto-discharge switch when EN is low. |+| 3 | EN | input | Enable input, active high. VENH ≥ 1.0V turns the regulator on (max 7.0V); VENL ≤ 0.38V forces shutdown (ISHUT ≈ 10nA) and activates the COUT auto-discharge switch via RDCHG (~450Ω typ). Input leakage ±0.1µA. Do not leave floating. |+| 4 | NC | unconnected | No internal connection. Leave floating or tie to GND for best mechanical rigidity. |+| 5 | VOUT | power_out | Regulated 3.3V output (±2% initial accuracy). Delivers up to 500mA with a typical dropout of 230mV. Requires a 1.0µF (or larger) low-ESR ceramic output capacitor. Must not exceed VIN+0.3V to avoid reverse current through the P-MOSFET body diode. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shanghai Mingda Microelectronics |+| Package | SOT-23-5L |+| Category | PMIC |+| Pins | 5 |++## Ordering variants++- `MD52E33QC3`+- `MD52E33QC3MD52E33QA3`+- `MD52E33QC3MD52A33PA1`+- `MD52E33QC3MD52E33WB6`++## CAD (KiCad official)++- Symbol: `MD52E33QC3`+- 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/md52e33qc3-datasheet.pdf) (14 pp, sha256 `4168b8cf3e52f15f`, 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/md52e33qc3-datasheet.pdf)

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