ETA3512FSG 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	FB	input	Feedback input. Connect an external resistor divider from VOUT to FB and GND to set the output voltage per VOUT = 0.6V x (1 + R1/R2). Internal reference VREF = 0.6V typical (0.594-0.606V at 25 C).
2	GND	power_in	Device ground return. Reference for input, output, and control signals.
3	IN	power_in	Supply voltage input, 2.5V to 5.5V (7.5V abs max). Bypass with a 10uF ceramic capacitor to GND placed as close as possible to the pin.
4	SW	power_out	Switching node, drain connection of the internal high-side and low-side power MOSFETs. Connect a 1uH inductor between SW and the regulator output. High-side Rds(on) = 100 mOhm typ, low-side Rds(on) = 60 mOhm typ; high-side current limit 4.5A typ.
5	EN	input	Enable input. Drive high (>=1.2V rising) to enable the converter, low (<=0.4V falling) to disable/shutdown. EN input current ~1uA at VEN=2V. Do not float.
6	PG	output	Power Good open-drain output. High impedance when the output voltage is within regulation (approximately 90% to 120% of the FB threshold, 5% hysteresis); pulled low otherwise. Requires an external pull-up resistor (e.g. 100k to VIN or logic rail).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

ETA3512FSG

CAD (KiCad official)

Symbol: ETA3512FSG
Footprint: Package_TO_SOT_SMD:SOT-563
3D model: SOT-563 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: etasolution datasheet (10 pp, sha256 cbb8879886b77602, 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