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MD7218A40PA1

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD7218A40PA1

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3L

MD7218A40PA1 from Shanghai Mingda Microelectronics, in a SOT-89-3L. 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 VIN power_in Input supply pin (also the center tab), with absolute maximum rating of -0.3 to 15V and recommended operating input of 2.2V to 18V per the electrical table.
3 VOUT power_out Regulated 4.0V output (MD7218A40) delivering up to 1A, with output potential not allowed to exceed VIN+0.3V.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3L
Category Power Management ICs
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
Output Voltage (4.0V variant, relative to VOUT(S)) 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 0.01 0.02 ％/V VOUT(S)+2V≤VIN≤15V, IOUT=1mA 4
Load Regulation (VOUT(S)≤5.0V) VOUT2 80 mV VIN=VOUT(S)+2V, 1mA≤IOUT≤1A 4
Temperature Stability -50 50 ppm/℃ VIN=VOUT(S)+2V, IOUT=1mA, -40℃≤Ta≤125℃ 4
GND Current (VOUT(S)≤5.0V) IGND 1 1.6 2 µA no load 4
Input Voltage VIN 2.2 18 V 4
Input Voltage (absolute maximum) VIN -0.3 15 V 3
Power Dissipation PD 1000 mW SOT89-3L package 3
Thermal Resistance Junction-to-Board RθJB 100 ℃/W SOT89-3L, mounted on JEDEC standard 4-layer (2s2p) PCB 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3
ESD Protection (HBM) ESD HBM 4000 V 3

CAD (KiCad official)

  • Symbol: MD7218A40PA1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: md7218a40pa1-etched.step / md7218a40pa1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7218a40pa1.step / md7218a40pa1.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 a1ab1acfaf9f63a7, retrieved 2026-10-29, 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