BL8077CB5TR33 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	Supply voltage input. Operating range 1.8V-5.5V, absolute maximum 8V. A 1µF input capacitor (Cin) is recommended.
2	GND	power_in	Device ground reference.
3	CE	input	Chip enable input, active-high with no internal pull-down. VCEL ≤ 0.4V shuts the regulator down (ISTANDBY ≤ 0.1µA) and enables the ~250Ω VOUT discharge path; VCEH ≥ 1.5V (up to 5.5V) enables the regulator. Must be tied to VIN or GND - do not leave floating.
4	NC	unconnected	No internal connection. Leave floating or tie as convenient for layout.
5	VOUT	power_out	Regulated output voltage (fixed per suffix: 1.2V, 1.8V, 2.5V, 2.8V, 3.0V, or 3.3V for the -33 variant this part → 3.3V). Delivers up to 300mA with 460mV typical dropout at 300mA (Vout=3.3V). Includes foldback short-circuit protection (~60mA into a short) and a ~250Ω active discharge when CE is low. 1µF output capacitor (Cout) recommended.

Key specifications

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

Ordering variants

BL8077CB5TR33CB5TR12
BL8077CB5TR33CB5TR18
BL8077CB5TR33CB5TR25
BL8077CB5TR33CB5TR28
BL8077CB5TR33CB5TR30
BL8077CB5TR33
BL8077CB5TR33CKETR12
BL8077CB5TR33CKETR18
BL8077CB5TR33CKETR25
BL8077CB5TR33CKETR28
BL8077CB5TR33CKETR30
BL8077CB5TR33CKETR33

CAD (KiCad official)

Symbol: BL8077CB5TR33
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
`bl8077cb5tr33.step`	85 KB	You want the bare part, or you mark your own boards.
`bl8077cb5tr33-etched.step`	2.6 MB	You want the part with `BL8077CB5TR33` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 622 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 (8 pp, sha256 c075616ed6f58c9f, 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