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MD8941

Public Unreviewed

by Ray

Shanghai Mingda Microelectronics DC-DC Converters, SOT-23-6L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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MD8941

Shanghai Mingda Microelectronics · DC-DC Converters · SOT-23-6L

MD8941 from Shanghai Mingda Microelectronics, in a SOT-23-6L. 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 BST passive Bootstrap capacitor pin for the high-side switch FET gate bias. Connect a bootstrap (Cboot) capacitor between BST and SW; the internal Vcb supply charges this capacitor to about 5V to drive the floating high-side power MOSFET. Absolute maximum BST-to-SW voltage is 6V.
2 GND power_in Ground connection. Should be connected as close as possible to the output capacitor to avoid routing high-current switch return paths through sensitive nodes.
3 FB input Feedback input to the internal error amplifier. Set the output voltage with a resistor divider from VOUT to FB to GND such that VOUT = VFB * (1 + R1/R2), where the internal reference VFB is typically 0.794V. Absolute maximum -0.3V to 6V.
4 EN input Enable input (active-high). Pulling EN below the threshold (typ 0.95V, rising, ~0.12V hysteresis) shuts the chip down; driving it above the threshold enables the chip. EN has an internal pull-down to GND, so floating this pin shuts the chip down. Absolute max 40V.
5 VIN power_in Input supply pin. Operating range 4.2V to 40V (absolute max -0.3V to 40V). Bypass locally with a low-ESR ceramic capacitor (e.g. 10uF) to GND close to the pin.
6 SW output Switch node; output from the high-side power MOSFET drain (RDS(on) ~600 mOhm). Connect the inductor here and a low forward-voltage Schottky freewheeling diode from SW to GND close to this pin to reduce switching spikes. Absolute max -0.3V to VIN(max)+0.3V.

Key specifications

Parameter Value
Manufacturer Shanghai Mingda Microelectronics
Package SOT-23-6L
Category PMIC
Pins 6

CAD (KiCad official)

  • Symbol: MD8941
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
md8941.step 97 KB You want the bare part, or you mark your own boards.
md8941-etched.step 1.4 MB You want the part with MD8941 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 341 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: Shanghai Mingda Microelectronics datasheet (12 pp, sha256 cd64e919c5ca63ba, 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