CJ6211A12N from Changjing, in a SOT-23. 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 / negative supply reference for the regulator.
2	VOUT	power_out	Regulated output. Fixed 1.2V nominal (per '12' MPN suffix); rated 500mA min / 700mA typ output current when VOUT >= 1.8V (300mA min / 500mA typ for VOUT >= 0.8V). Requires a >=1µF ceramic output capacitor. Internally current-limited and short-circuit protected (ISHORT ~= 100mA when VOUT is shorted to VSS).
3	VIN	power_in	Unregulated power input. Operating range 1.8V to 6.0V (absolute max -0.3V to 7V). Requires a >=1µF ceramic input capacitor. Typical dropout 55mV at IOUT=100mA (VOUT=3.3V).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

CJ6211A12NN
CJ6211A12NM
CJ6211A12NF

CAD (KiCad official)

Symbol: CJ6211A12N
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

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