component

MD7218E33QC3

Public Unreviewed

by Ray

Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Contents

README

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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

Same part, different packaging or reel option.

  • MD7218E33QC3
  • 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)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
md7218e33qc3.step 85 KB You want the bare part, or you mark your own boards.
md7218e33qc3-etched.step 2.4 MB You want the part with MD7218E33QC3 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 583 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (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