BL8563-33PRA 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 2.0V to 6V (absolute max 8V). Bypass with a 1uF ceramic capacitor to Vss close to the pin.
2	Vss	power_in	Ground reference for the regulator.
3	CE	input	Chip Enable. Drive high (Vceh ≥ 1.5V, max Vin) to enable the regulator; drive low (Vcel ≤ 0.25V) to shut down (Istandby = 0.1uA typ) and engage the built-in 1.5kΩ output discharge resistor. Internal 500kΩ pull-down (Rcepd) to Vss.
4	NC	unconnected	No internal connection. May be left floating or tied to Vss for mechanical stability.
5	Vout	power_out	Regulated 3.3V output (±2%, Vout ≥ 1.5V accuracy spec). Rated 300mA continuous, current-limited with fold-back short-circuit protection. Bypass with a 1uF ceramic output capacitor to Vss.

Key specifications

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

Ordering variants

BL8563-33PRA
BL8563-33PRAPQ
BL8563-33PRAPRM
BL8563-33PRACKETR
BL8563-33PRACKFTR

CAD (KiCad official)

Symbol: BL8563-33PRA
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: BL Shanghai Belling datasheet (9 pp, sha256 c6fe9ba9214e8e33, 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