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MD8433

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Shanghai Mingda Microelectronics Linear Voltage Regulators (LDO), TO-252-4L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MD8433

Shanghai Mingda Microelectronics · Linear Voltage Regulators (LDO) · TO-252-4L

MD8433 from Shanghai Mingda Microelectronics, in a TO-252-4L. 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 VOUT power_out Regulated output voltage pin (3.3V ±2% for MD8433, up to 300mA output current, 1.0uF minimum output capacitor, must not exceed VIN+0.3V).
2 EN input Enable pin: drive high (1.5V to 40V) to enable the device and low (0V to 0.6V) to put it into low current shutdown.
3 GND power_in Ground pin, which is also the thermal tab electrically connected to the GND node and to be connected to the GND plane for improved thermal performance.
4 NC unconnected No internal connection.
5 VIN power_in Power input pin with an operating input voltage range of 2.2V to 40V (absolute maximum 45V) and a 1.0uF minimum input capacitor.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package TO-252-4L
Category Power Supply Chip
Pins 5

CAD (KiCad official)

  • Symbol: MD8433
  • Footprint: Package_TO_SOT_SMD:TO-252-4
  • 3D model: TO-252-4L (KiCad packages3D, STEP)
  • 3D model files: md8433-etched.step / md8433-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); md8433.step / md8433.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 627a9d1fa1c18cbe, retrieved 2026-10-27, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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