SSP7786A-5.0V from Shanghai Siproin 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	NC	unconnected	No connection. Leave floating.
2	GND	power_in	Ground reference for the device.
3	VOUT	power_out	LDO regulated output voltage (5.0V typ for the -5V variant, 4.9V/5.0V/5.1V min/typ/max). Absolute max -0.3V to 7V. Output current limited to typ 138mA (100-160mA).
4	VDD	power_in	Voltage input supply / energy storage node. Connect a bulk capacitor from VDD to GND (Cvdd ~= 0.01 * Iload in F) to transfer input energy to the LDO stage. VDD_ON turn-on threshold 7.6/7.8/8V; absolute max 9V.
5	Drain	power_in	Internal 650V power MOSFET drain. Connect to rectified AC line; provides energy to the backward stage when the input voltage drops into the charging-window interval. Pins 5, 6, 7, 8 are tied together internally to the same drain node - the PCB layout guide directs the user to connect all four pads together and maximize copper area for heat dissipation.
6	Drain	power_in	Internal 650V power MOSFET drain (paralleled with pins 5, 7, 8). Tie all four Drain pads together on the PCB.
7	Drain	power_in	Internal 650V power MOSFET drain (paralleled with pins 5, 6, 8). Tie all four Drain pads together on the PCB.
8	Drain	power_in	Internal 650V power MOSFET drain (paralleled with pins 5, 6, 7). Tie all four Drain pads together on the PCB.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

SSP7786A-5V
SSP7786A-3.3V
SSP7786A-2.7V

CAD (KiCad official)

Symbol: SSP7786A-5.0V
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
`ssp7786a-5-0v.step`	122 KB	You want the bare part, or you mark your own boards.
`ssp7786a-5-0v-etched.step`	2.5 MB	You want the part with `SSP7786A-5.0V` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 609 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: Shanghai Siproin Microelectronics datasheet (10 pp, sha256 2afb02d06a43da06, 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