MD5336 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	GND	power_in	Ground / VSS reference for the regulator. Common return for input and output; connect to a single-point ground with CIN and CL returns.
2	VOUT	power_out	Regulated 3.6 V output (±2%), up to 500 mA. Requires an output capacitor CL ≥ 2.2 µF (tantalum) or ≥ 10 µF (aluminum electrolytic) between VOUT and VSS for stability. VOUT must not exceed VIN+0.3 V (parasitic body diode).
3	VIN	power_in	Unregulated input supply. Absolute maximum 12 V; recommended operating up to 10 V. Bypass to GND with CIN ≥ 1.0 µF as close to the pin as possible.

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.

MD536
MD5336MD5-36

CAD (KiCad official)

Symbol: MD5336
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`md5336.step`	57 KB	You want the bare part, or you mark your own boards.
`md5336-etched.step`	1.1 MB	You want the part with `MD5336` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 301 faces against 42 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 (16 pp, sha256 54cbb58cd55dcd8d, retrieved 2026-08-17, 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: 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