LNK605DG from POWER INTEGRATIONS, in a SOIC-7. 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 pin. Senses the AC voltage on the transformer bias winding to regulate both output voltage (CV mode) and output current (CC mode) via ON/OFF control of the internal power MOSFET. Internal inductance-correction circuitry also uses the forward voltage on the bias winding to sense bulk-cap voltage.
2	BP/M	power_in	BYPASS / Multi-Functional Programmable pin. Connection for the external 1 uF or 10 uF bypass capacitor that decouples the internally generated 6 V supply; the selected capacitor value also programs the amount of output cable-drop compensation on LNK61x devices.
4	D	power_in	DRAIN pin. Connection to the integrated 700 V power MOSFET drain. Also provides internal operating current for start-up and steady-state via an on-chip high-voltage current source.
5	S	power_in	SOURCE pin. Internally connected to the output MOSFET source; serves as the common return for the high-voltage power path and control circuitry. Multiple SOURCE pins are tied together and act as the IC thermal pad via PCB copper.
6	S	power_in	SOURCE pin (tied to pin 5). Power MOSFET source / signal common; also functions as heat-sinking pad, so ample copper area is recommended to keep source-pin temperature below 90 °C.
7	S	power_in	SOURCE pin (tied to pin 5). Power MOSFET source / signal common.
8	S	power_in	SOURCE pin (tied to pin 5). Power MOSFET source / signal common.

Key specifications

Parameter	Value
Manufacturer	POWER INTEGRATIONS
Package	SOIC-7
Category	PMIC
Pins	7

Ordering variants

Same part, different packaging or reel option.

LNK605DG
LNK605DGPG
LNK605DGGG

CAD (KiCad official)

Symbol: LNK605DG
Footprint: Package_SO:SOIC-8-N7_3.9x4.9mm_P1.27mm
3D model: SOIC-7 (KiCad packages3D, STEP)

Provenance

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

Datasheet: POWER INTEGRATIONS datasheet (18 pp, sha256 885858173fb26a4d, 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