FAN6240M6X from onsemi, in a SOT-23-6. 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	GATE	output	Gate drive output for the external synchronous rectifier MOSFET. Push-pull driver swings between GND (VOL <= 0.25 V) and VDD (VOH ~5 V) with ~10 ns rise/fall time into 3.3 nF load.
2	GND	power_in	Device ground reference. All voltages are specified with respect to this pin.
3	VDD	power_out	Internal 5 V LDO output and gate-drive power-supply rail (typ 5.25 V, recommended 2.8-6 V). Bypass with a 1 uF capacitor to GND.
4	VIN	power_in	LDO input, supports up to 30 V absolute max (recommended 2.8-20 V). Feeds the integrated 5 V LDO that generates the internal VDD rail for the low-voltage control circuitry. UVLO turn-on 3.4 V typ, turn-off 2.9 V typ.
5	SOURCE	input	Synchronous rectifier source sense input. Compared against the DRAIN pin (via VTH_OFF ~10 mV) to detect the SR turn-off point when MOSFET current decreases to near zero. Rated -0.3 V to 1 V.
6	DRAIN	input	Synchronous rectifier drain sense input. Monitors the SR MOSFET drain voltage; when it drops below VTH_ON (~-210 mV) with sufficient slope, the controller triggers the gate turn-on. Rated -1 V to 100 V absolute max.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

FAN6240M6X

CAD (KiCad official)

Symbol: FAN6240M6X
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: onsemi datasheet (10 pp, sha256 a583a7439feba5a6, 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