HCJT1117B-3.3 from HXY MOSFET, in a SOT-223. 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 fixed-output version. Connects to the internal reference/error amplifier return.
2	Vout	power_out	Regulated 3.3 V output (typ; 3.235-3.365 V over 10 mA-1 A, 5.3 V ≤ Vin ≤ 12 V). Requires an output capacitor for stability.
3	Vin	power_in	Unregulated input supply. Recommended range up to 15 V; absolute max 18 V. For 3.3 V output, Vin must be ≥ 5.3 V at full load (dropout ~1.4 V at 1 A). The SOT-223 tab is electrically connected to Vout (substrate).

Key specifications

Parameter	Value
Manufacturer	HXY MOSFET
Package	SOT-223
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

HCJT1117B-3.3

CAD (KiCad official)

Symbol: HCJT1117B-3.3
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HXY MOSFET datasheet (6 pp, sha256 8a493c1ffee2e959, 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