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MD7219E18QC3

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD7219E18QC3

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-5L

MD7219E18QC3 from Shanghai Mingda Microelectronics, in a SOT-23-5L. 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 VIN power_in Input supply pin accepting 2.2V to 18V (absolute maximum 20V); place the input capacitor close to it.
2 GND power_in Ground reference for the regulator.
3 EN input Active-high enable input; high level is 1.6V to 18V and low level is 0V to 0.5V.
4 NC unconnected No internal connection.
5 VOUT power_out Regulated 1.8V output (±2%) delivering up to 1A, with a low-ESR ceramic output capacitor.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5L
Category Power Supply Chip
Pins 5

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
Line Regulation 0.01 0.02 %/V VOUT(S)+2V≤VIN≤18V, IOUT=1mA 4
Load Regulation ΔVOUT2 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 14 30 µA no load, VOUT(S)≤5.0V 4
Shutdown Current ISHUT 0.1 1 µA VIN=18V, VEN=0 4
Input Voltage VIN 2.2 18 V 4
Maximum Output Current IOUTMAX 1 A 4
EN High Level Voltage VENH 1.6 18 V 4
EN Low Level Voltage VENL 0 0.5 V 4
EN High Level Current IENH -0.1 0.1 µA VIN=18V, VEN=VIN 4
EN Low Level Current IENL -0.1 0.1 µA VIN=18V, VEN=0 4
Input Voltage (absolute maximum) VIN -0.3 20 V Ta=25℃ 3
Power Dissipation SOT23-5L PD 250 mW SOT23-5L 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3
ESD Protection HBM ESD 4000 V HBM 3
Thermal Resistance SOT23-5L RθJA 180 ℃/W SOT23-5L 3
GND Current at 100mA IGND 420 µA IOUT=100mA 4
Current Limit ILIM 1.35 A VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) 4
PSRR 10Hz PSRR 72 dB f=10Hz, IOUT=10mA 4
PSRR 100Hz PSRR 80 dB f=100Hz, IOUT=10mA 4
PSRR 1kHz PSRR 75 dB f=1kHz, IOUT=10mA 4
Short Circuit Current ISHORT 40 mA VIN=VEN=VOUT(S)+2.0V, VOUT=0V 4
Over Temperature Protection OTP 150 ℃ IOUT=1mA 4

CAD (KiCad official)

  • Symbol: MD7219E18QC3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: md7219e18qc3-etched.step / md7219e18qc3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7219e18qc3.step / md7219e18qc3.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (15 pp, sha256 0052f2803aae3218, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF