HT7133H23 from HX hengjiaxing, 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 (0 V). Must be tied to the system single-point ground; also the return for the internal bandgap reference and error amplifier.
2	VIN	power_in	Unregulated supply input, absolute maximum +30 V (recommended operating -0.3 V to +30 V). Bypass with a 10 µF polarized capacitor placed close to the pin.
3	VOUT	power_out	Regulated 3.3 V output (±2%), 100 mA maximum. A ceramic output capacitor >=2.2 µF (10 µF recommended) is required from VOUT to GND for phase compensation via the cap's ESR.

Key specifications

Parameter	Value
Manufacturer	HX hengjiaxing
Package	SOT-23-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

HT7133H23
HT7133-H
HT7133H23HX7133-H
HT7133-92
HT7133H23HX7133

CAD (KiCad official)

Symbol: HT7133H23
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: HX hengjiaxing datasheet (8 pp, sha256 9434b35fbd744a46, 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