SY8088AAC from Silergy Corp, 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	EN	input	Enable control input. Pull high (VENH ≥ 1.5V) to turn on the regulator; pull low (VENL ≤ 0.4V) to shut down (ISHDN ≈ 0.1µA). Do not float. Absolute max: VIN + 0.6V.
2	GND	power_in	Ground pin. Return for both power stage and control circuitry. Maximize PCB copper area to this pin for best thermal and noise performance.
3	LX	power_out	Switching node output. Connect to one end of the external inductor (typical 2.2µH). Internal high-side PFET (260mΩ) and low-side NFET (170mΩ) switch this node between VIN and GND at 1.5MHz.
4	IN	power_in	Supply input pin, 2.5V to 5.5V operating range (absolute max 6.0V). Decouple to GND with at least a 4.7µF X7R ceramic capacitor placed close to the pin.
5	FB	input	Output feedback pin. Connect to the mid-point of an external resistor divider from VOUT to GND to program the output voltage: VOUT = 0.6V × (1 + R1/R2), where VREF = 0.6V (±2%). Optional 10-47pF cap across R1 speeds up transient response.

Key specifications

Parameter	Value
Manufacturer	Silergy Corp
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

SY8088AAC

CAD (KiCad official)

Symbol: SY8088AAC
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
`sy8088aac.step`	85 KB	You want the bare part, or you mark your own boards.
`sy8088aac-etched.step`	2.2 MB	You want the part with `SY8088AAC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 508 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: Silergy Corp datasheet (9 pp, sha256 d9ec5bc0d2d97bea, retrieved 2026-08-17, tier: manufacturer)
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