ETA3458FSG from etasolution, in a SOT-563. 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	GND	power_in	Ground return for the device. Connect to the system ground plane with low-impedance path close to the input capacitor.
2	SW	output	Switching node. Connect the external power inductor between SW and the regulator output. Internally driven by the high-side and low-side power MOSFETs (RDS(on) ~37mΩ HS / ~25mΩ LS).
3	VIN	power_in	Supply input, 2.5V to 5.5V. Bypass with a 22µF ceramic capacitor to GND placed close to the pin. Absolute maximum 7V.
4	EN	input	Enable input. Drive high (rising threshold typ 1.2V, falling 0.4V) to enable the converter; drive low to shut down (IQ <1µA). For automatic start-up, tie EN to VIN through a pull-up resistor. Absolute maximum 7V.
5	FB	input	Feedback input to the internal error comparator. Connect an external resistor divider from VOUT to FB and GND to set the output voltage: VOUT = 0.6V × (1 + R1/R2). Internal reference 0.6V (±1%); R2 should be 1kΩ-70kΩ.
6	OUT	input	Output sense/feed-forward pin. Connect to VOUT (the regulated output rail) or leave not connected. Used internally by the Adaptive COT control loop.

Key specifications

Parameter	Value
Manufacturer	etasolution
Package	SOT-563
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

ETA3458FSG

CAD (KiCad official)

Symbol: ETA3458FSG
Footprint: Package_TO_SOT_SMD:SOT-563
3D model: SOT-563 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`eta3458fsg.step`	448 KB	You want the bare part, or you mark your own boards.
`eta3458fsg-etched.step`	2.2 MB	You want the part with `ETA3458FSG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 464 faces against 54 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: etasolution datasheet (10 pp, sha256 842e4e68b2a492eb, 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