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MD5344-1

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

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MD5344-1

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-23-3L

MD5344-1 from Shanghai Mingda Microelectronics, in a SOT-23-3L. 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 pin of the MD5344-1 4.4V LDO regulator.
2 VIN power_in Regulator input; operating input voltage up to 10V (absolute maximum 12V).
3 VOUT power_out Regulated 4.4V (±2%) output, up to 500mA with about 1A current limit; needs an output capacitor of 2.2µF or more close to VOUT and VSS.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-3L
Category Power Supply Chip
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
Input voltage (absolute maximum) VIN 12 V Ta=25℃ 2
Power dissipation SOT-23 PD 250 mW SOT-23, Ta=25℃ 2
Thermal resistance SOT-23 RθJB 200 ℃/W SOT-23, JEDEC 4-layer (2s2p) PCB 2
Operating ambient temperature TOPR -40 85 ℃ 2
Storage temperature TSTG -40 125 ℃ 2
Output voltage tolerance (nominal 4.4V) VOUT(S) -2 2 % VIN=VOUT+1V, IOUT=50mA 3
Output voltage nominal VOUT 4.4 V MD5344-1 catalog value 2
Output current IOUT 500 mA VIN=VOUT+1V 3
Line regulation ΔVOUT1/ΔVIN*VOUT 0.05 0.2 %/V VOUT+1V≤VIN≤10V, IOUT=10mA 3
Load regulation ΔVOUT2 20 40 mV VIN=VOUT+1V, 1mA≤IOUT≤100mA 3
Output voltage temperature coefficient ΔVOUT/ΔTa*VOUT(S) -100 50 100 ppm/℃ VIN=VOUT+1V, IOUT=1mA, -40℃≤Ta≤125℃ 3
Supply current ISS1 1.2 2.5 uA VIN=10V, no load 3
Input voltage VIN 10 V 3
Current limit ILIM 1 A VIN=VOUT+1V 3
Power supply rejection ratio PSRR 44 dB f=100Hz, IOUT=10mA 3
Power supply rejection ratio PSRR 23 dB f=1kHz, IOUT=10mA 3
Input capacitor CIN 1 µF 1.0 µF or more 8

CAD (KiCad official)

  • Symbol: MD5344-1
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: md5344-1-etched.step / md5344-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md5344-1.step / md5344-1.glb are the bare package body.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256 248fdd6b5737ce18, 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