XC6219B252MR from UMW, in a SOT23-5. 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. Operating range 1.8V to 7V, absolute maximum 9V. Bypass to VSS with a 10µF ceramic capacitor close to the pin.
2	VSS	power_in	Device ground reference (0V).
3	CE	input	Chip Enable (active high). VCEH = 1.6V min (up to VIN) enables the regulator; VCEL = 0 to 0.5V places the device in shutdown (turn-off current typ. 0.1µA). CE input current ≤0.5µA. Do not leave floating.
4	NC	unconnected	No internal connection. Leave open or tie as convenient for the PCB layout.
5	VOUT	power_out	Regulated output, fixed 2.5V ±2.5% for XC6219B252MR. Supplies up to 300mA (typ) with a 280mV typ dropout at 100mA. Requires a 10µF ceramic output capacitor for stability.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	SOT23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

XC6219B252MRB152MR
XC6219B252MRB182MR
XC6219B252MR
XC6219B252MRB282MR
XC6219B252MRB302MR
XC6219B252MRB332MR
XC6219B252MRB362MR
XC6219B252MRB502MR
XC6219B252MRB152PR
XC6219B252MRB182PR
XC6219B252PR
XC6219B252MRB282PR
XC6219B252MRB302PR
XC6219B252MRB332PR
XC6219B252MRB362PR
XC6219B252MRB502PR

CAD (KiCad official)

Symbol: XC6219B252MR
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT23-5 (KiCad packages3D, STEP)

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