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MD75R50

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

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MD75R50

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-5

MD75R50 from Shanghai Mingda Microelectronics, in a SOT-23-5. 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 VDD power_in Power supply input; withstands up to 18V operating input (absolute maximum 20V) while keeping the output regulated.
2 GND power_in Ground pin.
3 CE input Chip enable, active high; VCEH minimum 1.0V to operate, VCEL maximum 0.35V to shut down.
4 NC unconnected No connection; leave floating.
5 VOUT power_out Regulated 5.0V (±2%) output, up to 120mA, needs 2.2uF or larger output capacitor to GND with ESR of about 0.5-5 ohm.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5
Category Power Management ICs
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 4.9 5 5.1 V VIN=7V, IOUT=10mA 3
Output current IOUT 120 180 mA VIN=6V 3
Dropout voltage (typ) Vdrop 5 mV IOUT=1mA 3
Dropout voltage (max) Vdrop 250 mV IOUT=50mA 3
Line regulation ΔVOUT/ΔVIN·VOUT 0.05 0.2 %/V 6V≤VIN≤18V, IOUT=1mA 3
Load regulation ΔVOUT2 60 100 mV VIN=6V, 1.0mA≤IOUT≤120mA 3
Output voltage temperature coefficient ΔVOUT/ΔTa·VOUT 50 100 ppm/°C VIN=6V, IOUT=10mA, -40℃≤Ta≤85℃ 3
Supply current ISS 1.2 5 uA VIN=18V, no load 3
Standby current ISS1 0.1 1 uA VIN=18V, CE=GND, no load 3
CE pull-up current ICEH 0.1 1 uA VIN=VCE=VOUT+1V 3
CE input high level VCEH 1 1 V 3
CE input low level VCEL 0 0.35 V 3
Input voltage Vmax 18 V 3
Output short-circuit current Ishort 160 mA Vout=0V 3
Input voltage VIN 20 V Ta=25℃ 2
Power dissipation PD 200 mW SOT-23-5, Ta=25℃ 2
Operating ambient temperature Topr -40 85 °C 2
Storage temperature Tstg -40 125 °C 2
Input capacitor CIN 1 µF 5
Output capacitor (tantalum) CL 2.2 µF tantalum 5

CAD (KiCad official)

  • Symbol: MD75R50
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: md75r50-etched.step / md75r50-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md75r50.step / md75r50.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (9 pp, sha256 f24bf1a24834dc74, retrieved 2026-10-23, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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