Diodes Incorporated

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The DIODES™ AL5819 is 36V Low Dropout Linear LED driver offering excellent temperature stability and adjustable output current handling capability. The AL5819 simplifies the design of linear and isolated or non-isolated LED drivers by setting the LED current with standard value resistors.  It is a simple and elegant solution to deliver constant current for a single LED string.

The AL5819 has an open drain output that can swing up to 36V enabling it drive long LED chains. Its RSET pin is outside of the LED current path and regulated accuracy while minimizing the required overheads to regulate the LED current. This reduces its power dissipation when compared to traditional linear LED drivers. 

The AL5819 is available in the SOT26 (Type SM) package.


  • Up to 36V Vin Open-Drain Output
  • -40°C to +125°C Temperature Range
  • 5kV ESD HBM for VIN Pin, 2kV ESD HBM for All Other Pins
  • No External Capacitor Required for Normal Operation
  • Support LED Dimming Through Power Supply Vin
  • Support LED Dimming Through RSET Control
  • Connect Devices in Parallel to Increase Output Current
  • High LED Current Tolerance: ±5% @ 30mA
  • Low Drop-out Voltage on LED Pin: 250mV Max @ 60mA
  • High Power Supply Rejection
  • Low Temperature Drift
  • Thermal Fold Back
  • Output Current up to 100mA
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative.



  • LED strips
  • LED displays and channel letters
  • Architectural and landscape lighting
  • Retail lighting in fridges, freezer cases and vending machines
  • Signage and decorative LED lighting

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topology Linear LED Driver
Minimum Supply Voltage (V) 5 V
Maximum Supply Voltage (V) 36 V
Maximum VOUT (V) 36 V
Number of Channels 1
Output Current (mA) 100 mA
Accuracy (%) 5 %
Dimming Ext PWM
Temperature Range (°C) -40 to 125 °C

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