ME6228A33PG from MICRONE, 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	VSS	power_in	Ground reference (地). Connect to system ground; forms the return path for both the input and output current.
2	VIN	power_in	Power supply input (电源输入端). Accepts 3.3 V to 30 V for the A33 variant (VIN must be ≥ VOUT + dropout ≈ VOUT + 1.5 V for full 150 mA regulation). Bypass with a 10 uF input capacitor; if VIN exceeds 15 V, use an electrolytic or tantalum input capacitor because the ceramic cap alone causes severe inrush spikes.
3	VOUT	power_out	Regulated voltage output (电压输出端). Delivers fixed 3.3 V ±2% up to 150 mA for the A33 variant. Requires a low-ESR ceramic output capacitor of ~20 uF for stability. Short-circuit current is typically 18 mA.

Key specifications

Parameter	Value
Manufacturer	MICRONE
Package	SOT-89-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

ME6228A33PG
ME6228A33PGA50PG
ME6228A33PGA25M3G
ME6228A33PGA28M3G
ME6228A33PGA30M3G
ME6228A33PGA33M3G
ME6228A33PGA33TG

CAD (KiCad official)

Symbol: ME6228A33PG
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
`me6228a33pg.step`	57 KB	You want the bare part, or you mark your own boards.
`me6228a33pg-etched.step`	1.8 MB	You want the part with `ME6228A33PG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 462 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: MICRONE datasheet (12 pp, sha256 4babba5a77f5a54d, 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