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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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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs md7218e33qc3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
md7218e33qc3-etched.fit.json md7218e33qc3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
md7218e33qc3-etched.glb md7218e33qc3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
md7218e33qc3-etched.step md7218e33qc3: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
md7218e33qc3.glb Publish 0.1.0 · Ray
md7218e33qc3.kicad_mod Publish 0.1.0 · Ray
md7218e33qc3.kicad_sym Publish 0.1.0 · Ray
md7218e33qc3.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
md7218e33qc3.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json md7218e33qc3: specified limits as data (metadata.characteristics, 22 rows from the datasheet) · Ray
README.md md7218e33qc3: specified limits as data (metadata.characteristics, 22 rows from the datasheet) · Ray

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage VOUT(S) 0.98 1.02 ×VOUT(S) VIN=VOUT(S)+2V, IOUT=1mA 4
Dropout Voltage VDROP 4 8 mV IOUT=1mA 4
Dropout Voltage VDROP 650 900 mV IOUT=1A 4
Line Regulation ΔVOUT/ΔVIN 0.01 0.02 ％/V VOUT(S)+2V≤VIN≤15V, IOUT=1mA 4
Load Regulation VOUT2 80 mV VIN=VOUT(S)+2V, 1mA≤IOUT≤1A, VOUT(S)≤5.0V 4
Temperature Stability -50 50 ppm/℃ VIN = VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ 4
GND Current IGND 1 1.6 2 µA no load, VOUT(S)≤5.0V 4
Input Voltage VIN 2.2 18 V 4
Maximum Output Current IOUTMAX 1 A 4
Power Dissipation (SOT23-5L) PD 250 mW 3
Input Voltage (absolute maximum) VIN -0.3 15 V 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3
ESD Protection HBM ESD HBM 4000 V 3
Thermal Resistance Junction-to-Board (SOT23-5L) RθJB 180 ℃/W Mounted on JEDEC standard 4layer (2s2p) PCB test board 3
Current Limit ILIM 1.5 A VIN= VOUT(S)+2V, VOUT = 0.95 ×VOUT(S) 4
Short Circuit Current ISHORT 30 mA VIN=VOUT(S)+2.0V, VOUT=0V 4
Over Temperature Protection OTP 150 ℃ IOUT=1mA 4
GND Current IGND 420 µA IOUT=100mA 4
Power Supply Rejection Ratio PSRR 71 dB f=10Hz, IOUT=10mA 4
Power Supply Rejection Ratio PSRR 70 dB f=100Hz, IOUT=10mA 4
Power Supply Rejection Ratio PSRR 51 dB f=1kHz, IOUT=10mA 4

CAD (KiCad official)

  • Symbol: MD7218E33QC3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: md7218e33qc3-etched.step / md7218e33qc3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7218e33qc3.step / md7218e33qc3.glb are the bare package body.

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