CJ6211B33M from Changjing, in a SOT-23-5L. 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	VSS	power_in	Ground reference for the regulator. All voltages are measured with respect to this pin.
2	VOUT	power_out	Regulated 3.3V output pin. Requires a 1µF ceramic COUT to VSS for stability. Supplies up to 700mA typical (500mA min for VOUT≥1.8V) with 55mV dropout at 100mA. Internally discharged through ~60Ω N-channel FET when CE is de-asserted (B variant).
3	VIN	power_in	Unregulated input supply pin, 1.8V to 6.0V operating range (absolute max 7V). Bypass to VSS with a 1µF ceramic CIN capacitor.

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	SOT-23-5L
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

CJ6211B33MM
CJ6211B33MN
CJ6211B33MF

CAD (KiCad official)

Symbol: CJ6211B33M
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj6211b33m.step`	85 KB	You want the bare part, or you mark your own boards.
`cj6211b33m-etched.step`	2.1 MB	You want the part with `CJ6211B33M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 508 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: Changjing datasheet (11 pp, sha256 805289572b9842e1, 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