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MD73R33

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

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MD73R33

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

MD73R33 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 VDD power_in Supply input terminal; the input voltage can be raised to a maximum of 18 V while the output stays regulated.
2 GND power_in Ground terminal.
3 CE input Enable control terminal; the datasheet gives VCEH minimum 1.0 V and VCEL maximum 0.35 V.
4 NC unconnected No-connect (floating) pin, left unconnected.
5 VOUT power_out Regulated output terminal; VOUT must not exceed VIN+0.3 V, otherwise reverse current can damage the IC.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-5L
Category Power Supply Chip
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 3.234 3.3 3.366 V VIN= 5.3V, IOUT=10mA 2
Output current IOUT 300 mA VIN= 5.3V 2
Input-output voltage differential Vdrop 250 mV IOUT=1 mA; IOUT=100 mA 2
Input stability ΔVOUT1/(ΔVIN·VOUT) 0.05 0.2 ％/V 4.3V≤VIN≤18V, IOUT=1mA 2
Load stability ΔVOUT2 60 100 mV VIN=5.3V, 1.0mA≤IOUT≤300mA 2
Output voltage temperature coefficient ΔVOUT/(ΔTa·VOUT) 50 100 Ppm/℃ VIN=4.3V, IOUT=10mA, -40℃≤Ta≤85℃ 2
Consumption current ISS 20 30 uA VIN=18V, no load 2
Static current ISS1 0.1 1 uA VIN=18V, CE=GND, no load 2
CE pull-up current ICEH 0.1 1 uA VIN=VCE=VOUT+1V 2
CE input high voltage VCEH 1 V 2
CE input low voltage VCEL 0 0.35 V 2
Input voltage VIN 18 V 2
Output short-circuit current Ilim 15 50 mA Vout=0V 2
Allowable power dissipation PD 250 mW SOT-23-5L 2
Operating ambient temperature range Topr -40 85 ℃ 2
Storage ambient temperature range Tstg -40 125 ℃ 2

CAD (KiCad official)

  • Symbol: MD73R33
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: md73r33-etched.step / md73r33-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md73r33.step / md73r33.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (10 pp, sha256 72bda1000b9c09a2, retrieved 2026-10-27, 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-haiku-5-5 (text), consensus off (skipped (clean text read)), 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