HX3608 from HX hengjiaxing, in a SOT-23-6L. 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	SW	output	Switching node. Drain of the internal 4A NMOS power switch; connects to the boost inductor and Schottky rectifier. Carries the high-frequency switching waveform (1.2MHz) and must be routed short and isolated from sensitive nets. Absolute max 28V, RDS(on) ~80mΩ.
2	GND	power_in	Ground reference for the device. Return path for the power switch and internal control circuitry.
3	FB	input	Feedback input to the error amplifier. Connect a resistor divider from VOUT to FB to GND to set output voltage: VOUT = 0.6V x (1 + R1/R2). Internal reference VR = 600mV (588-612mV). R1 recommended in the hundreds-of-kΩ range.
4	EN	input	Chip enable, active high. VENH >= 1.2V enables the converter; VENL <= 0.5V shuts it down (IOFF <= 1µA). Do not leave floating.
5	VIN	power_in	Supply/bias input for internal control circuitry. Operating range 2-24V (UVLO ~1.7-2V). Requires a 1uF ceramic decoupling capacitor to GND close to the pin. May be tied to VIN or to VOUT; when VIN < 5V, tying pin 5 to VOUT is recommended to strengthen gate drive.
6	NC	unconnected	No connect. Leave floating.

Key specifications

Parameter	Value
Manufacturer	HX hengjiaxing
Package	SOT-23-6L
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

HX3608AR
HX3608AL

CAD (KiCad official)

Symbol: HX3608
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`hx3608.step`	97 KB	You want the bare part, or you mark your own boards.
`hx3608-etched.step`	1.6 MB	You want the part with `HX3608` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 390 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: HX hengjiaxing datasheet (6 pp, sha256 c124e6edb58bd1df, 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