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MD7218E40QC3

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

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MD7218E40QC3

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L

MD7218E40QC3 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; absolute maximum input voltage is -0.3 V to 15 V, and the electrical table lists a typical operating range of 2.2 V to 18 V.
2 GND power_in Ground reference pin for the regulator.
3 EN input Enable pin as labeled in the SOT23-5L pinout; the datasheet gives no logic threshold or enable-function description.
4 NC unconnected No internal connection.
5 VOUT power_out Regulated output pin; VOUT must not exceed VIN + 0.3 V, because the parasitic diode between VIN and VOUT can destroy the IC under reverse current.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5L
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
Output Voltage VOUT(S) 0.98 1.02 x 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 VOUT(S)≤5.0V; VIN=VOUT(S)+2V, 1mA≤IOUT≤1A 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
Operating Ambient Temperature Topr -40 85 ℃ 3
Storage Temperature Tstg -40 125 ℃ 3
Power Dissipation (SOT23-5L) PD 250 mW SOT23-5L 3
ESD Protection HBM ESD HBM 4000 V 3
Thermal Resistance (SOT23-5L) RθJB 180 ℃/W Mounted on JEDEC standard 4layer (2s2p) PCB test board 3
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

CAD (KiCad official)

  • Symbol: MD7218E40QC3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: md7218e40qc3-etched.step / md7218e40qc3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md7218e40qc3.step / md7218e40qc3.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 2026-10-17, 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