SSP8613 from Shanghai Siproin Microelectronics, in a SOT-23-5. 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	Switch pin. Drain of the internal 36V, 550mA (typ) NPN power switch. Connect the boost inductor and Schottky catch diode here. Minimize trace area at this pin to keep EMI down.
2	GND	power_in	Device ground / power return for the internal switch. Tie directly to the local ground plane; the output capacitor ground should return close to this pin to minimize dI/dt loop area.
3	FB	input	Feedback pin for the internal error amplifier. Internal reference is 1.23V. Connect to the tap of an external resistor divider from VOUT; VOUT = 1.23V x (1 + R1/R2). Typical bias current is 27nA (80nA max). Minimize trace area at this pin.
4	SHDN	input	Active-low shutdown / enable input. Tie to >=1V to enable the converter; pull to GND to shut the device down (quiescent current drops to ~0.01uA). Absolute maximum voltage is 10V.
5	VIN	power_in	Input supply pin. Operating range approximately 1.1V (min operating) to 10V (max operating). Must be locally bypassed with a low-ESR capacitor placed within 5mm of the pin to avoid regulation/oscillation issues.

Key specifications

Parameter	Value
Manufacturer	Shanghai Siproin Microelectronics
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

SSP8613

CAD (KiCad official)

Symbol: SSP8613
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ssp8613.step`	85 KB	You want the bare part, or you mark your own boards.
`ssp8613-etched.step`	1.9 MB	You want the part with `SSP8613` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 444 faces against 102 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 (12 pp, sha256 35784d9cf0f454f9, 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