BL1118CS8TR1833 from BL Shanghai Belling, in a ESOP-8. 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	Channel 1 ground return. On adjustable versions this pin becomes the ADJ (feedback) pin, but on the BL1118CS8TR1833 (fixed 1.8V CH1) it is tied to ground.
2	Vin1	power_in	Channel 1 supply input. Absolute maximum 12V; requires a 10uF bypass capacitor (Cin1) to ground close to the pin.
3	GND	power_in	Channel 2 ground return. On adjustable versions this pin becomes the ADJ (feedback) pin, but on the BL1118CS8TR1833 (fixed 3.3V CH2) it is tied to ground.
4	Vin2	power_in	Channel 2 supply input. Absolute maximum 12V; requires a 10uF bypass capacitor (Cin2) to ground close to the pin.
5	Vout2	power_out	Channel 2 regulated output (3.3V on the -1833 variant, up to 1A). Tie in parallel with pin 6 and bypass with a 10uF output capacitor.
6	Vout2	power_out	Channel 2 regulated output (paralleled with pin 5) for current sharing to the 1A load.
7	Vout1	power_out	Channel 1 regulated output (paralleled with pin 8) for current sharing to the 1A load.
8	Vout1	power_out	Channel 1 regulated output (1.8V on the -1833 variant, up to 1A). Tie in parallel with pin 7 and bypass with a 10uF output capacitor.
9	EP	power_in	Exposed thermal pad on the ESOP-8 package underside. Solder to the PCB ground copper pour for heat dissipation (θJC = 10°C/W, θJA = 63°C/W).

Key specifications

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

Ordering variants

BL1118CS8TR1833

CAD (KiCad official)

Symbol: BL1118CS8TR1833
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`bl1118cs8tr1833.step`	125 KB	You want the bare part, or you mark your own boards.
`bl1118cs8tr1833-etched.step`	3.4 MB	You want the part with `BL1118CS8TR1833` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 802 faces against 152 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 (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