CJ6330B33M 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	IN	power_in	Regulator input supply, 2.5V to 18V operating (absolute max 24V). Place a 1µF ceramic input capacitor as close to IN and GND as possible for best transient response.
2	GND	power_in	Regulator ground. Common reference for input, output and enable.
3	EN	input	Active-high enable input. Drive EN high (≥1.5V) to enable the regulator, drive low (≤0.3V) to shut it down (standby current 0.2µA typ). Do not float; tie to IN if unused. Absolute max VEN = 24V.
4	NC	unconnected	No internal connection. May be left floating; connecting to GND improves thermal performance.
5	OUT	power_out	Regulated 3.3V output, up to 300mA. Requires a 1µF ceramic output capacitor between OUT and GND placed as close to the pins as possible to maintain stability and transient response.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

CJ6330B33MBxxM
CJ6330B33MAxxMF
CJ6330B33MAxxMR
CJ6330B33MAxxM
CJ6330B33MAxxMC
CJ6330B33MAxxMY
CJ6330B33MAxxP
CJ6330B33MAxxPT
CJ6330B33MAxxPL
CJ6330B33MAxxG
CJ6330B33MAxxGF

CAD (KiCad official)

Symbol: CJ6330B33M
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
`cj6330b33m.step`	85 KB	You want the bare part, or you mark your own boards.
`cj6330b33m-etched.step`	2.5 MB	You want the part with `CJ6330B33M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 590 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 (35 pp, sha256 ef1dd74aa3b7af80, 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