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MD7218C18YA2

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD7218C18YA2

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-3L

MD7218C18YA2 from Shanghai Mingda Microelectronics, in a SOT-223-3L. 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 GND power_in Ground pin of the regulator.
2 VOUT power_out Regulated output (1.8V for this variant, up to 1A), also the tab; should not exceed VIN+0.3V and uses a 2.2uF output capacitor in the typical application.
3 VIN power_in Input supply, 2.2V to 18V operating (absolute maximum 20V), with a 2.2uF input capacitor placed close to the IC.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-223-3L
Category Power Management (PMIC)
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage VIN 2.2 18 V 5
Input Voltage (absolute maximum) VIN -0.3 20 V 4
Dropout Voltage VDROP 3 8 mV VOUT(S)=3.3V, IOUT=1mA 5
Dropout Voltage VDROP 1000 1300 mV VOUT(S)=3.3V, IOUT=1A 5
Line Regulation ΔVOUT/(VOUT·ΔVIN) 0.01 0.02 %/V VOUT(S)+2V≤VIN≤18V, IOUT=1mA 5
Temperature Stability ΔVOUT/(VOUT·ΔT) -50 50 ppm/℃ VIN=VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ 5
GND Current IGND 1 1.6 2 µA no load, VOUT(S)≤5.0V 5
Shutdown Current ISHUT 0.1 1 µA VIN=18V, VEN=0 5
EN 'H' Level Voltage VENH 1.5 18 V 5
EN 'L' Level Voltage VENL 0 0.5 V 5
EN 'H' Level Current IENH -0.1 0.1 µA VIN=18V, VEN=VIN 5
EN 'L' Level Current IENL -0.1 0.1 µA VIN=18V, VEN=0 5
Power Dissipation (SOT223-3L) PD 1500 mW SOT223-3L 4
Thermal Resistance Junction-to-Ambient (SOT223-3L) RθJA 66 ℃/W SOT223-3L 4
Operating Ambient Temperature Topr -40 85 ℃ 4
Storage Temperature Tstg -40 125 ℃ 4
ESD Protection (HBM) ESD HBM 4000 V HBM 4
Load Regulation VOUT2 80 mV VIN=VOUT(S)+2V, 1mA≤IOUT≤1A, VOUT(S)≤5.0V 5
GND Current at load IGND 420 µA IOUT=100mA 5
Maximum Output Current IOUTMAX 1 A 5
Current Limit ILIM 1.5 A VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) 5
Power Supply Rejection Ratio PSRR 75 dB f=10Hz, IOUT=10mA 5
Power Supply Rejection Ratio PSRR 80 dB f=100Hz, IOUT=10mA 5
Power Supply Rejection Ratio PSRR 65 dB f=1kHz, IOUT=10mA 5
Short Circuit Current ISHORT 30 mA VIN=VOUT(S)+2.0V, VOUT=0V 5
Over Temperature Protection OTP 150 ℃ IOUT=1mA 5

CAD (KiCad official)

  • Symbol: MD7218C18YA2
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223-3L (KiCad packages3D, STEP)
  • 3D model files: md7218c18ya2-etched.step / md7218c18ya2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7218c18ya2.step / md7218c18ya2.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (16 pp, sha256 a1c66b635dda8f58, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-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