HT7133S from UMW, in a SOT-23. 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. Common return for VIN and VOUT bypass capacitors.
2	VIN	power_in	Unregulated input supply. Absolute maximum 30 V; recommended operation up to 30 V with a 10 µF input bypass capacitor to GND. For 3.3 V output, VIN should be at least ~3.4 V (typical 0.1 V dropout at 1 mA).
3	VOUT	power_out	Regulated 3.3 V output (±3% tolerance). Supplies up to ~100 mA (typ) with 10 µF output bypass capacitor to GND. Load regulation typ 100 mV over 1-30 mA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

HT7133SS

CAD (KiCad official)

Symbol: HT7133S
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

Datasheet: UMW datasheet (14 pp, sha256 ae108c17cf1258c8, 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