DS8561-25S3 from DSTECH, in a SOT23-3. 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	GND	power_in	Ground reference for the regulator. Connect directly to the system ground plane.
2	VOUT	power_out	Regulated voltage output. For the -25 variant the fixed output is 2.5 V, capable of sourcing up to 300 mA. Requires a 1 μF ceramic (or tantalum) output capacitor to GND for stability.
3	VIN	power_in	Power supply input. Accepts 1.2 V to 5.5 V; absolute maximum 7 V relative to GND. Bypass with a 1 μF ceramic capacitor to GND close to the pin.

Key specifications

Parameter	Value
Manufacturer	DSTECH
Package	SOT23-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

DS8561-25S3
DS8561-25S3SS3
DS8561-25S3S5
DS8561-25S3C5
DS8561-25S3D4
DS8561-25S3D6

CAD (KiCad official)

Symbol: DS8561-25S3
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT23-3 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: DSTECH datasheet (19 pp, sha256 b28c6b5e18533c57, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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