XC6219B302MR from UMW, 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	Input supply pin. Accepts 1.8 V to 7 V (absolute max 9 V). Bypass to VSS with a 10 µF ceramic capacitor near the pin.
2	VSS	power_in	Ground / negative supply reference for the regulator.
3	CE	input	Chip enable (active-high). VCEH ≥ 1.6 V enables the regulator; VCEL ≤ 0.5 V disables it (turn-off current typ. 0.1 µA). CE input current is ≤ 0.5 µA over VCE = 0 V to VIN. Do not leave floating.
4	NC	unconnected	No internal connection. Leave floating or tie to VSS.
5	VOUT	power_out	Regulated output pin. For the B302 option, VOUT = 3.0 V ±2.5%, up to 300 mA. Requires a 10 µF ceramic output capacitor for stability.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

XC6219B302MR
XC6219B302MRPR

CAD (KiCad official)

Symbol: XC6219B302MR
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
`xc6219b302mr.step`	85 KB	You want the bare part, or you mark your own boards.
`xc6219b302mr-etched.step`	2.6 MB	You want the part with `XC6219B302MR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 611 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: UMW datasheet (9 pp, sha256 b0229c0bd1c70b57, 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