XC9145B33CMR-G from Torex Semicon, in a SOT-25. 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	CE	input	Chip Enable. H = Active, L = Stand-by. Do not leave open (undefined state). VCEH ≥ 1.50V (max 6.0V); VCEL ≤ 0.30V. Input current ≤ 0.1µA.
2	GND	power_in	Ground reference for the IC. All voltages in the datasheet are referenced to this pin.
3	BAT	power_in	Power Supply Input (battery pin). Operating input voltage VBAT = 0.65V to 5.5V, operation start voltage 1.6V, operation hold voltage 0.65V. Absolute max 6.6V.
4	VOUT	power_out	Regulated boost output (fixed 3.3V for this option). Also serves as the output-voltage sense/feedback node for the internal divider, load-disconnect controller, and VDD MAX selector. Absolute max 6.6V.
5	Lx	output	Switching node connecting to the external boost inductor (typ. 4.7µH). Internal 200mΩ N-ch driver FET low-side and 270mΩ P-ch synchronous rectifier high-side. Max continuous ILx = 2.0A; absolute max voltage 6.6V.

Key specifications

Parameter	Value
Manufacturer	Torex Semicon
Package	SOT-25
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

XC9145B33CMR-G
XC9145B33CMR-GER-G
XC9145B33CMR-G0R-G

CAD (KiCad official)

Symbol: XC9145B33CMR-G
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-25 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`xc9145b33cmr-g.step`	85 KB	You want the bare part, or you mark your own boards.
`xc9145b33cmr-g-etched.step`	2.7 MB	You want the part with `XC9145B33CMR-G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 648 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: Torex Semicon datasheet (29 pp, sha256 4583a91f3e201771, 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