BL9110-250BPFB from BL Shanghai Belling, in a SOT-223. 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	GND	power_in	Device ground return. Reference for VDD, VOUT and the CE input threshold. Tie to the system ground plane with a low-impedance connection.
2	VOUT	power_out	Regulated output pin, fixed 2.5V nominal (±2% accuracy for the 'B' grade). Sources up to 1A load current; requires a 2.2uF output capacitor to ground for stability. Auto-discharged (~50Ω) when the regulator is disabled.
3	VDD	power_in	Unregulated input supply, 2.5V to 6.0V (absolute max 7V). Decouple with a 2.2uF (10uF recommended) ceramic capacitor to GND close to the pin. Chip Enable (CE) is tied to VDD internally through the application, since this 3-pin SOT-223-3 variant does not expose the CE pin (device is always enabled).

Key specifications

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

Ordering variants

BL9110-250BPFBFA
BL9110-250BPFB
BL9110-250BPFBFC
BL9110-250BPFBFD
BL9110-250BPFBDA
BL9110-250BPFBAA
BL9110-250BPFBBA
BL9110-250BPFBBB
BL9110-250BPFBCA
BL9110-250BPFBEA
BL9110-250BPFBEB
BL9110-250BPFBGA
BL9110-250BPFBGB
BL9110-250BPFBGC
BL9110-250BPFBHA
BL9110-250BPFBIA
BL9110-250BPFBIB
BL9110-250BPFBIC
BL9110-250BPFBJA

CAD (KiCad official)

Symbol: BL9110-250BPFB
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bl9110-250bpfb.step`	64 KB	You want the bare part, or you mark your own boards.
`bl9110-250bpfb-etched.step`	2.5 MB	You want the part with `BL9110-250BPFB` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 623 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 (30 pp, sha256 b94966cd4c52e86b, 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