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MD85A40PA1

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), SOT-89-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD85A40PA1

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · SOT-89-3L

MD85A40PA1 from Shanghai Mingda Microelectronics, in a SOT-89-3L. 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 reference pin; the datasheet lists it as ground with no separate electrical limit.
2 VIN power_in Power input pin; input voltage range is 2.2V to 40V, with an absolute maximum rating of -0.3V to 45V.
3 VOUT power_out Regulated output voltage pin; the VOUT pin potential must not exceed VIN+0.3V to avoid reverse current damage.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-89-3L
Category Power Management ICs
Pins 3

CAD (KiCad official)

  • Symbol: MD85A40PA1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3L (KiCad packages3D, STEP)
  • 3D model files: md85a40pa1-etched.step / md85a40pa1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md85a40pa1.step / md85a40pa1.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 2669d0b7ea07427b, retrieved 2026-11-05, 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