BL1118CS8TRAD33 from BL Shanghai Belling, in a ESOP-8-EP. 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/ADJ	power_in	Channel 1 ground (fixed-output version) or adjust pin (adjustable version). In the adjustable configuration, this pin is tied to the resistor divider midpoint; the regulator forces 1.25V between Vout1 and this pin. Adjust-pin current is typically 55uA (max 120uA).
2	Vin1	power_in	Channel 1 input supply. Operating range up to 12V max. Bypass with a 10uF input capacitor (tantalum, electrolytic, or MLCC) close to the pin.
3	GND/ADJ	power_in	Channel 2 ground (fixed-output version) or adjust pin (adjustable version). In the adjustable configuration this pin is the feedback node driven to 1.25V above the corresponding output.
4	Vin2	power_in	Channel 2 input supply. Operating range up to 12V max. Bypass with a 10uF input capacitor close to the pin. Pin configuration is customizable on demand so both channels can share a single input.
5	Vout2	power_out	Channel 2 regulated output. Tied together with pin 6 to share current up to 1A. Requires a 10uF output capacitor.
6	Vout2	power_out	Channel 2 regulated output (paralleled with pin 5). Fixed at 1.2/1.8/2.5/3.3/5V per ordering code, or set by external divider on the ADJ variant. 1A maximum with typical 1.3V dropout.
7	Vout1	power_out	Channel 1 regulated output (paralleled with pin 8). Requires a 10uF output capacitor. 1A maximum with typical 1.3V dropout.
8	Vout1	power_out	Channel 1 regulated output (paralleled with pin 7). Fixed at 1.2/1.8/2.5/3.3/5V per ordering code, or set by external divider on the ADJ variant.
9	EP	power_in	Exposed thermal pad on the underside of the ESOP-8 package. Solder to a ground copper pour for heat dissipation; theta-JC = 10 C/W, theta-JA = 63 C/W.

Key specifications

Parameter	Value
Manufacturer	BL Shanghai Belling
Package	ESOP-8-EP
Category	PMIC
Pins	9

Ordering variants

BL1118CS8TRAD33
BL1118CS8TRAD33CS8TR3333
BL1118CS8TRAD33CS8TRADAD

CAD (KiCad official)

Symbol: BL1118CS8TRAD33
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
3D model: ESOP-8-EP (KiCad packages3D, STEP)

Provenance

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

Datasheet: BL Shanghai Belling datasheet (8 pp, sha256 85526dbc6c09a729, 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