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Automotive Compliant Two Terminal Constant Current LED Driver

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The AL5809Q is a constant current linear LED driver and provides a cost-effective two pin solution. It offers an excellent temperature stability 20 ppm/°C and the current accuracy ±3% regulated over a wide voltage range. The AL5809 simplifies the design for linear LED drivers allowing it to be designed as a high or low-side constant current regulator without any external components.

The AL5809Q turns on immediately and its 60V Voltage rating between Input and Output pins swing enables it drive long LED chains.


  • Robust Power Package up to 1.5W for PowerDI123
  • -40°C to +125°C Temperature Range
  • ±3% LED Current Tolerance
  • 15mA, 20mA, 25mA, 30mA, 40mA, 50mA, 60mA, 90mA, 100mA, 120mA, and 150mA Constant Current Options
  • Constant Current with Low Temperature Drift and High Power Supply Rejection Ratio
  • 2.5V to 60V Operating Voltage between Two Terminals


  • Automotive Interior Lamps
  • Automotive Instrument Illumination

Product Specifications

Product Parameters

AEC Qualified Yes
Compliance (Only Automotive supports PPAP) Automotive
Topology Linear LED Driver
Minimum Supply Voltage (V) 2.5 V
Maximum Supply Voltage (V) 60 V
Maximum VOUT (V) 60 V
Number of Channels 1
LED Current Sense Voltage (mV) N/A mV
Output Current (A) Fixed mA
Channel Max. Output Current (mA) 10 to 150 mA
Accuracy (%) 5 %
Dimming Ext PWM
Temperature Range (°C) -40 to 125 °C

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