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LNK605DG

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by Ray

POWER INTEGRATIONS AC-DC Controllers and Regulators, SOIC-7. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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LNK605DG

POWER INTEGRATIONS · AC-DC Controllers and Regulators · SOIC-7

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