DS8604-33S3 from DSTECH, in a SOT-23-3. 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. Connect to the system ground plane; also serves as the return for input and output decoupling capacitors.
2	VOUT	power_out	Regulated power output. Fixed 3.3V (±1%) for the -33 option, capable of sourcing up to 200mA. Requires a 1µF (or larger) low-ESR ceramic (or tantalum ≥1mΩ ESR, 1-22µF) output capacitor placed close to the pin.
3	VIN	power_in	Power input. Accepts 2.0V to 55V (absolute max 60V). Bypass with a 1µF or larger ceramic capacitor close to the pin. For 3.3V output, VIN should exceed VOUT + VDROP (~0.75V at 100mA).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

DS8604-33S3
DS8604-33S3S5
DS8604-33S3A3

CAD (KiCad official)

Symbol: DS8604-33S3
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

Provenance

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

Datasheet: DSTECH datasheet (11 pp, sha256 94c6447041e97c0e, 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