LNK364PN from POWER INTEGRATIONS, in a DIP-8B. 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	S	power_in	Power MOSFET source connection. Also the ground reference for the BYPASS and FEEDBACK pins. Multiple SOURCE pins are tied together internally and should be soldered to a sufficient copper area for thermal dissipation (kept at or below 100 °C).
2	S	power_in	Power MOSFET source connection (tied to other SOURCE pins internally). Serves as the ground reference for the BP and FB pins and as the primary thermal path.
3	BP	power_in	BYPASS pin. Connection point for a 0.1 µF external bypass capacitor to the internally generated 5.8 V supply. Undervoltage disables the MOSFET below 4.8 V; a 6.3 V shunt clamps the pin. If an external bias winding is used, current into BP must not exceed 1 mA.
4	FB	input	FEEDBACK pin. ON/OFF control input; MOSFET switching for the next cycle is disabled when the current delivered into this pin exceeds the ~49 µA logic-high threshold (V_FB ≈ 1.63 V for LNK363/364). Sampled at the start of each oscillator cycle.
5	D	power_in	DRAIN pin. High-voltage (700 V BV_DSS) power MOSFET drain connection to the transformer primary. Also supplies internal operating current for both startup and steady-state via an integrated high-voltage current source, eliminating the need for a bias winding.
6	S	power_in	Power MOSFET source connection (tied to other SOURCE pins internally). Note: on the DIP-8B outline, pin 6 is often omitted on Power Integrations parts to provide HV creepage between DRAIN (pin 5) and SOURCE; verify against the package drawing.
7	S	power_in	Power MOSFET source connection (tied to other SOURCE pins internally). Ground reference for BP/FB and primary thermal path.
8	S	power_in	Power MOSFET source connection (tied to other SOURCE pins internally). Ground reference for BP/FB and primary thermal path.

Key specifications

Parameter	Value
Manufacturer	POWER INTEGRATIONS
Package	DIP-8B
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

LNK364PNP
LNK364PN
LNK364PNG
LNK364PNGN
LNK364PND
LNK364PNDN

CAD (KiCad official)

Symbol: LNK364PN
Footprint: Package_DIP:DIP-8_W7.62mm
3D model: DIP-8B (KiCad packages3D, STEP)

Provenance

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

Datasheet: POWER INTEGRATIONS datasheet (16 pp, sha256 650ad03ed20c90e2, 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