CJ6376B33M from Changjing, 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	Unregulated power input, 2.5 V to 36 V (absolute max 40 V). A ceramic input capacitor of 1.0 µF or greater is recommended between VIN and VSS.
2	VSS	power_in	Device ground / common return for VIN, VOUT and CE. All voltages in the datasheet are referenced to this pin.
3	CE	input	Active-high chip enable. VCE ≥ 1.5 V (up to VIN) turns the regulator on; VCE ≤ 0.3 V forces standby (ISTBY ≤ 0.5 µA). Absolute-max VCE is −0.3 to 33 V. On the 'B' option this input has an internal pull-down resistor, and when the regulator is disabled an internal ~150 Ω resistor discharges COUT.
4	NC	unconnected	No internal connection. Leave floating or tie to VSS; do not use for signal routing.
5	VOUT	power_out	Regulated 3.3 V output, up to 300 mA continuous (current limit 350-600 mA, short-circuit current typ. 100 mA). Requires an output capacitor of 1.0 µF or greater to VSS for stability.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

CJ6376B33MM
CJ6376B33MMC
CJ6376B33MMY
CJ6376B33MMF
CJ6376B33MMR
CJ6376B33MG
CJ6376B33MGW
CJ6376B33MGL

CAD (KiCad official)

Symbol: CJ6376B33M
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj6376b33m.step`	85 KB	You want the bare part, or you mark your own boards.
`cj6376b33m-etched.step`	2.3 MB	You want the part with `CJ6376B33M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 545 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 (9 pp, sha256 a7cfa923a8e0132f, 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