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MD8312

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Shanghai Mingda Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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MD8312

Shanghai Mingda Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

MD8312 from Shanghai Mingda Microelectronics, in a SOT-89-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VOUT power_out Regulated 12V output. Drive with a >=1.0uF low-ESR ceramic capacitor to GND placed close to the pin. Maximum output current 300mA (typ), current-limited around 550mA with foldback. Must not exceed VIN+0.3V or the internal parasitic diode will conduct.
2 GND power_in Device ground / return. Quiescent GND current is ~1.5uA (no load) and rises with IOUT (typ 460uA at IOUT=100mA). SOT89 heat-slug tab; connect to the ground plane for thermal dissipation (PD=1000mW, RθJB=100 °C/W).
3 VIN power_in Unregulated input supply, 2.2V to 40V (absolute max 45V). Bypass with a >=1.0uF ceramic capacitor to GND close to the pin to avoid oscillation. For the 12V output variant VIN must be at least VOUT + dropout (~1.3V typ at 300mA).

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • MD8312
  • MD8312A

CAD (KiCad official)

  • Symbol: MD8312
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: md8312-etched.step / md8312-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md8312.step / md8312.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 b90bf74c0495d786, retrieved 2026-08-17, 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