SDH8322STR from Hangzhou Silan Microelectronics, in a SOP-8. 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	SOURCE	power_in	Source of the integrated high-voltage power MOSFET. Tied together with pin 2; connects to the current-sense/return node of the switching converter (typically the return/ground of the power stage in a non-isolated buck-boost topology).
2	SOURCE	power_in	Second SOURCE pin of the integrated high-voltage power MOSFET. Tied with pin 1 to provide the switching converter return path.
3	VSET	input	Output voltage setting input. Three-level select pin that programs the internal reference / feedback divider for 12 V, 15 V or 18 V output. In the reference application it is left open (12 V), tied through a resistor R1 (15 V), or configured for 18 V per the datasheet's typical application diagrams. Internal 2 V EA reference is used with the on-chip VDD divider.
4	VDD	power_in	Chip supply pin. Charged by the internal high-voltage startup current source from the DRAIN pins; then held by an external bypass/auxiliary capacitor. Protected by VDD UVLO (typ. 16.5 V start / 8.8 V stop) and VDD OVP (typ. 26 V).
5	DRAIN	power_in	Drain of the integrated high-voltage power MOSFET. Connects to the switching node (inductor and rectified bulk high-voltage rail via the converter topology). Also feeds the internal high-voltage startup current source that charges VDD.
6	DRAIN	power_in	Drain of the integrated high-voltage power MOSFET. Tied with pins 5, 7 and 8.
7	DRAIN	power_in	Drain of the integrated high-voltage power MOSFET. Tied with pins 5, 6 and 8.
8	DRAIN	power_in	Drain of the integrated high-voltage power MOSFET. Tied with pins 5, 6 and 7. Four DRAIN pins are ganged to handle the switching current and improve thermal dissipation.

Key specifications

Parameter	Value
Manufacturer	Hangzhou Silan Microelectronics
Package	SOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

SDH8322STR

CAD (KiCad official)

Symbol: SDH8322STR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sdh8322str.step`	122 KB	You want the bare part, or you mark your own boards.
`sdh8322str-etched.step`	2.5 MB	You want the part with `SDH8322STR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 597 faces against 147 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: Hangzhou Silan Microelectronics datasheet (5 pp, sha256 407e5698b2c8f07f, 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