BL8568CB5ATR18 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-6V (absolute max 8V). Recommend 1uF ceramic decoupling capacitor to Vss.
2	Vss	power_in	Ground return pin for the regulator.
3	CE	input	Chip enable. Drive high (Vceh ≥ 1.5V, up to Vin) to enable the regulator; drive low (Vcel ≤ 0.25V) to enter shutdown (Istandby 0.1uA typ) and activate the 1.5kΩ output discharge path. Internally pulled down through ~5MΩ (Rcepd).
4	NC	unconnected	No internal connection. Leave floating or tie to ground on the PCB.
5	Vout	power_out	Regulated 1.8V output (±2% accuracy, 500mA max, 300mV typ dropout at 300mA). Requires 1uF ceramic output capacitor for stability. Actively discharged through ~1.5kΩ when CE is low.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

BL8568CB5ATR18
BL8568CB5ATR18CA5TR
BL8568CB5ATR18CB3TR
BL8568CB5ATR18CKETR

CAD (KiCad official)

Symbol: BL8568CB5ATR18
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 (8 pp, sha256 87eda87a1304f4a6, 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