BL9165-330BARN 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	Power input voltage. Operating range 1.8V to 5.5V (absolute max -0.3V to +6V). Bypass with a 1μF ceramic capacitor to GND close to the pin.
2	GND	power_in	Device ground reference and current return. Should be tied to the system ground plane.
3	EN	input	Chip Enable input, active high with internal pull-down resistor (suffix 'A'). VIH ≥ 1.2V enables the regulator; VIL ≤ 0.4V shuts it down. Absolute max range -0.3V to VIN.
4	NC	unconnected	No internal connection. May be left floating or tied to GND for mechanical support.
5	VOUT	power_out	Regulated output voltage (3.3V for -330 option, ±2% accuracy, up to 500mA). Requires only a 1μF ceramic output capacitor for stability; features fast output discharge on shutdown.

Key specifications

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

Ordering variants

BL9165-330BARN
BL9165-330BARNURN
BL9165-330BARNDRN

CAD (KiCad official)

Symbol: BL9165-330BARN
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
`bl9165-330barn.step`	85 KB	You want the bare part, or you mark your own boards.
`bl9165-330barn-etched.step`	2.8 MB	You want the part with `BL9165-330BARN` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 661 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 (15 pp, sha256 fa16b8d01534082c, 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