BL8072CLTR33 from BL Shanghai Belling, in a SOT-223-3. 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/ADJ	power_in	Ground / adjust pin. Tie to GND for fixed-voltage operation. In adjustable mode, connect the mid-point of the external resistor divider (R1 to Vout, R2 to GND) here to set Vout = Vref × (1 + R2/R1). Adjust pin current I_ADJ is typically ~2 µA. R1 is normally 1 kΩ-10 kΩ; a 0.1 µF ceramic bypass cap between this pin and GND improves ripple rejection.
2	VOUT	power_out	Regulated output. Delivers up to 2 A within ±2% of the nominal set voltage (customized 1.2V-5.0V in 0.1V steps; this suffix -33 => 3.3V). A 1 µF ceramic output capacitor to GND is required for stability. Typical dropout is 850 mV at 1.5 A for Vout ≥ 2.0V.
3	VDD	power_in	Unregulated input supply. Recommended operating range up to 18V (absolute max 20V). Requires a 1 µF ceramic bypass capacitor to GND placed close to the pin. Input must exceed Vout by at least the dropout voltage to maintain regulation.

Key specifications

Parameter	Value
Manufacturer	BL Shanghai Belling
Package	SOT-223-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

BL8072CLTR33
BL8072CLTR33COTR

CAD (KiCad official)

Symbol: BL8072CLTR33
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bl8072cltr33.step`	64 KB	You want the bare part, or you mark your own boards.
`bl8072cltr33-etched.step`	2.4 MB	You want the part with `BL8072CLTR33` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 568 faces against 75 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 48a7d46f1c8be9ee, 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