AL5809-50S1-7 from Diodes Incorporated, in a SOD-123. 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	IN	power_in	LED current input terminal. For low-side LED string applications the LED cathode connects to IN; for high-side applications the input supply connects here. In-to-Out operating voltage range is 2.5V to 60V (abs max 80V), with the device sinking the preset LED current (50mA for the -50S1-7 option) from IN to OUT.
2	OUT	power_out	LED current output terminal. For low-side LED string applications the LED anode connects to OUT; for high-side applications the LED cathode connects here. All chip voltages are referenced to OUT; an external MOSFET pulling OUT to ground provides optional PWM dimming (100-200Hz recommended).

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	SOD-123
Category	LED-drv
Pins	2

Ordering variants

AL5809-50S1-715S1-7
AL5809-50S1-720S1-7
AL5809-50S1-725S1-7
AL5809-50S1-730S1-7
AL5809-50S1-740S1-7
AL5809-50S1-7
AL5809-50S1-715P1-7
AL5809-50S1-720P1-7
AL5809-50S1-725P1-7
AL5809-50S1-730P1-7
AL5809-50S1-740P1-7
AL5809-50S1-750P1-7
AL5809-50S1-760P1-7
AL5809-50S1-790P1-7
AL5809-50S1-7100P1-7
AL5809-50S1-7120P1-7
AL5809-50S1-7150P1-7

CAD (KiCad official)

Symbol: AL5809-50S1-7
Footprint: Diode_SMD:D_SOD-123
3D model: SOD-123 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated datasheet (16 pp, sha256 62d6aa33a04e33b0, 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