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MD7218E33PC1

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-5. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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Contents

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MD7218E33PC1

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-5

MD7218E33PC1 from Shanghai Mingda Microelectronics, in a SOT-89-5. 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 NC unconnected No connection pin on the SOT89-5L package.
2 GND power_in Ground pin; the SOT89-5L top-view drawing also labels the package tab as 2.
3 EN input Enable input pin; the datasheet text gives no logic thresholds or function description for it.
4 VIN power_in Input supply pin, absolute maximum -0.3 to 15 V, with a 2.2 V minimum operating input voltage.
5 VOUT power_out Regulated 3.3 V output (MD7218E33), up to 1 A, for use with a low-ESR ceramic output capacitor (2.2uF in the typical application).

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-5
Category Power Management (PMIC)
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
Input Voltage VIN 2.2 18 V 4
GND Current (VOUT(S)<=5.0V) IGND 1 1.6 2 µA no load, VOUT(S)<=5.0V 4
Dropout Voltage VDROP 4 8 mV IOUT=1mA 4
Dropout Voltage VDROP 650 900 mV IOUT=1A 4
Line Regulation ΔVOUT/(VOUT·ΔVIN) 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 ΔVOUT/(VOUT·ΔTa) -50 50 ppm/℃ VIN = VOUT(S)+2V, IOUT=1mA, -40℃<=Ta<=125℃ 4
Maximum Output Current IOUTMAX 1 A 4
GND Current at IOUT=100mA 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
Input Voltage (absolute) VIN -0.3 15 V 3
Power Dissipation (SOT89-5L) PD 1000 mW 3
Thermal Resistance Junction-to-Board (SOT89-5L) RθJB 100 ℃/W Mounted on JEDEC standard 4layer (2s2p) PCB test board 3
ESD Protection HBM ESD HBM 4000 V 3
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3

CAD (KiCad official)

  • Symbol: MD7218E33PC1
  • Footprint: Package_TO_SOT_SMD:SOT-89-5
  • 3D model: SOT-89-5 (KiCad packages3D, STEP)
  • 3D model files: md7218e33pc1-etched.step / md7218e33pc1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7218e33pc1.step / md7218e33pc1.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 2026-10-21, 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