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MD7218A33PA1

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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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MD7218A33PA1

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

MD7218A33PA1 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 reference pin for the regulator; the datasheet gives no electrical limit specific to this pin.
2 VOUT power_out Regulated output of the MD7218A33 (3.3 V nominal, ±2% accuracy); VOUT must not exceed VIN+0.3V, and the absolute maximum range is Vss-0.3 V to VIN+0.3 V.
3 VIN power_in Input supply pin with an absolute maximum rating of -0.3 V to 15 V; the Electrical Characteristics give an operating input voltage range of 2.2 V to 18 V.

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 Accuracy (tolerance) VOUT(S) -2 2 % 2
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 ΔVOUT/ΔT -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
Input Voltage (absolute maximum) VIN -0.3 15 V 3
Power Dissipation PD 1000 mW SOT89-3L 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3
ESD Protection HBM ESD HBM 4000 V 3
GND Current IGND 420 µA IOUT=100mA 4
Current Limit ILIM 1.5 A VIN=VOUT(S)+2V, VOUT=0.95×VOUT(S) 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
Short Circuit Current ISHORT 30 mA VIN=VOUT(S)+2.0V, VOUT=0V 4
Over Temperature Protection OTP 150 ℃ IOUT=1mA 4
Thermal Resistance Junction-to-Board RθJB 100 ℃/W SOT89-3L, mounted on JEDEC standard 4-layer (2s2p) PCB test board 3

CAD (KiCad official)

  • Symbol: MD7218A33PA1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: md7218a33pa1-etched.step / md7218a33pa1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7218a33pa1.step / md7218a33pa1.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 2026-11-05, 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