BL8072COTR33 from BL Shanghai Belling, in a TO-252. 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/ADJ	power_in	Ground / adjust pin. Tie to GND for the fixed-voltage version (BL8072COTR33 = fixed 3.3V). In adjustable configurations this pin is driven by an external R1/R2 divider from Vout; adjust-pin current IAdj is ~2µA.
2	VOUT	power_out	Regulated output. Fixed 3.3V ±2% for the BL8072COTR33 order code. Supplies up to 2A (Vin-Vout ≥ 1V for Vout ≥ 2.0V). Requires a 1µF ceramic output capacitor to GND for stability.
3	VDD	power_in	Input supply. Absolute max 20V, recommended operating max 18V. Requires a 1µF ceramic bypass capacitor to GND. For 3.3V output (COTR33) recommended Vin ≥ ~4.3V for full spec operation.

Key specifications

Parameter	Value
Manufacturer	BL Shanghai Belling
Package	TO-252
Category	PMIC
Pins	3

Ordering variants

BL8072COTR33
BL8072COTR33CLTR

CAD (KiCad official)

Symbol: BL8072COTR33
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bl8072cotr33.step`	119 KB	You want the bare part, or you mark your own boards.
`bl8072cotr33-etched.step`	2.4 MB	You want the part with `BL8072COTR33` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 582 faces against 83 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: BL Shanghai Belling datasheet (7 pp, sha256 a3ba73e83005f510, 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