BL8078CC3BTR50 from BL Shanghai Belling, 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	VOUT	power_out	Regulated output voltage (5.0V for -50 suffix, ±2%). Requires a 1uF ceramic output capacitor to GND for stability. Maximum output current 150mA; internally current-limited at ~180mA.
2	GND	power_in	Device ground reference. Should be tied to the ground plane; also the thermal path for the SOT-89 tab (pin 2 is fused to the mounting tab).
3	VIN	power_in	Unregulated supply input, 3V to 40V (50V absolute max). Requires a 1uF ceramic input capacitor to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	BL Shanghai Belling
Package	SOT-89-3
Category	PMIC
Pins	3

Ordering variants

BL8078CC3BTR50
BL8078CC3BTR50CC3TR

CAD (KiCad official)

Symbol: BL8078CC3BTR50
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
`bl8078cc3btr50.step`	57 KB	You want the bare part, or you mark your own boards.
`bl8078cc3btr50-etched.step`	2.3 MB	You want the part with `BL8078CC3BTR50` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 574 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: BL Shanghai Belling datasheet (5 pp, sha256 85f4bbd4c457d3ba, 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