SY8088IAAC 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 (>1.2V) to turn on the regulator; pull low (<0.4V) to shut down (ISHDN ~0.1µA). Do not leave floating. Absolute max = VIN + 0.6V.
2	GND	power_in	Ground reference for the IC. Also serves as the return for the internal synchronous (low-side) MOSFET. Case position used for θJC measurement is pin 3; GND should have maximized copper for thermal performance.
3	LX	output	Switching node. Connect to the external inductor. Internal top/bottom power MOSFETs (260mΩ / 170mΩ RDS(ON)) drive this node at 1.5MHz. Also provides output auto-discharge via ~50Ω RDIS when disabled. Absolute max −0.3V to 6.0V.
4	IN	power_in	Supply input pin, 2.5V to 5.5V operating range (6.0V absolute max). Decouple to GND with at least a 10µF X5R (or better) ceramic capacitor placed close to the pin.
5	FB	input	Output feedback input. Connect to the center of an external resistor divider (RH/RL) from VOUT to GND to program the output voltage: VOUT = 0.6 × (1 + RH/RL). Internal reference VREF = 0.6V typ. Absolute max = VIN + 0.6V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SY8088IAAC

CAD (KiCad official)

Symbol: SY8088IAAC
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
`sy8088iaac.step`	85 KB	You want the bare part, or you mark your own boards.
`sy8088iaac-etched.step`	2.2 MB	You want the part with `SY8088IAAC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 531 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 (10 pp, sha256 058fdba118f3f436, 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