SY6280AAC 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	OUT	power_out	Switched output pin. Drain of the internal P-channel MOSFET; delivers current from IN when EN is high. Includes ~150Ω discharge resistance to GND at shutdown. Reverse-blocking (no body diode) so OUT can be forced above IN while disabled.
2	GND	power_in	Ground reference for the device. Also serves as the case position for θJC thermal measurement.
3	ISET	input	Current-limit programming pin. Connect a resistor RSET from ISET to GND to program the switch current limit: Ilim (A) = 6800 / RSET (Ω). Valid range is 0.4A to 2A.
4	EN	input	Active-high ON/OFF control input. Pull high (VEN(H) ≥ 2V) to enable the switch; pull low (VEN(L) ≤ 0.8V) to disable. Must not be left floating. Leakage ≤ 1µA at VEN = 5.5V.
5	IN	power_in	Power input pin, 2.4V to 5.5V. Source of the internal P-channel MOSFET. A 10µF ceramic bypass capacitor to GND is strongly recommended to suppress hot-plug voltage droop and input ringing during output short events. UVLO threshold ~2.3V with 0.1V hysteresis.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SY6280AAC

CAD (KiCad official)

Symbol: SY6280AAC
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
`sy6280aac.step`	85 KB	You want the bare part, or you mark your own boards.
`sy6280aac-etched.step`	2.0 MB	You want the part with `SY6280AAC` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 469 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 (6 pp, sha256 64b2019999864afd, 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