BL8075CB5TR33 from BL Shanghai Belling, in a SOT-23-5. 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	VIN	power_in	Unregulated supply input, 3V to 16V (20V absolute max). Bypass locally with a 1uF ceramic capacitor to GND.
2	GND	power_in	Device ground return; common reference for VIN, VOUT and EN.
3	EN	input	Active-high enable input. Drive >=1.5V (up to VIN) to enable the regulator; drive <=0.4V to shut down the LDO (Iq drops to ~1uA at Vin=12V, VEN=0V). Do not leave floating.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for board layout convenience.
5	VOUT	power_out	Regulated output, factory-trimmed to 3.3V (+/-2%) for the TR33 suffix. Delivers up to 500mA with 600mV dropout at 300mA; requires a 1uF ceramic output capacitor to GND for stability.

Key specifications

Parameter	Value
Manufacturer	BL Shanghai Belling
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

BL8075CB5TR33
BL8075CB5TR33CC3TR

CAD (KiCad official)

Symbol: BL8075CB5TR33
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bl8075cb5tr33.step`	85 KB	You want the bare part, or you mark your own boards.
`bl8075cb5tr33-etched.step`	2.8 MB	You want the part with `BL8075CB5TR33` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 652 faces against 102 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 (6 pp, sha256 73ed30c1a6b4591d, 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