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The AL8400 is a 5-terminal adjustable Linear LED driver-controller offering excellent temperature stability and output handling capability. The AL8400 simplifies the design of linear and isolated LED drivers. With its low 200mV current sense FB pin, it controls the regulation of LED current with minimal power dissipation when compared to traditional linear LED drivers. This makes it ideal for medium to high current LED driving. 

The AL8400 open-collector output can operate from 0.2V to 18V enabling it to drive external MOSFET and Bipolar transistors. This enables the MOSFET and Bipolar selection to be optimized for the chosen application. It also provides the capability to drive longer LED chains, by tapping VCC from the chain, where the chain voltage may exceed 18V. 

It is available in the space saving low profile SOT353 package. 

The AL8400Q is Automotive Grade and is AEC-Q100 Grade 1 qualified. 


  • Isolated Offline LED Lamps 
  • Linear LED Driver 
  • LED Signs 
  • Instrumentation Illumination 


  • Low Reference Voltage (VFB = 0.2V) 
  • -40 to +125°C Temperature Range 
  • 3% Reference Voltage Tolerance at +25°C 
  • Low Temperature Drift 
  • 0.2V to 18V Open-Collector Output 
  • High Power Supply Rejection:
    • (> 45dB at 300kHz) 
  • AL8400QSE-7 Automotive Grade qualified to AEC-Q100 Grade 1
  • SOT353: Available in “Green” Molding Compound (No Br, Sb) 
  • Lead-Free Finish; RoHS Compliant  
  • Halogen and Antimony Free. “Green” Device 

Product Specifications

Product Parameters

Qualified to AECQ10x Yes
Automotive Compliant PPAP AL8400Q
Topology Linear Controller
Minimum Supply Voltage 2.2 V
Maximum Supply Voltage 18 V
Maximum VOUT 18 V
Number of Channels 1
LED Current Sense Voltage 200 mV
Output Current 15 mA
LED Current Ext Transistor mA
Accuracy 3 %
Dimming Ext
Temperature Range -40 to 125 °C

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Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL8400QEV1 Digi-Key Electronics 5 1/18/2020 Buy Now United States
AL8400QSE-7 Arrow Electronics 3000 1/19/2020 Buy Now United States
AL8400QSE-7 Arrow Electronics 6000 1/19/2020 Buy Now United States
AL8400QSE-7 Arrow Electronics Central EU 159000 1/19/2020 Buy Now Germany
AL8400QSE-7 Mouser Electronics Inc. 2990 1/19/2020 Buy Now United States
AL8400QSE-7 Digi-Key Electronics 6000 1/18/2020 Buy Now United States
AL8400QSE-7 Future Electronics - Asia 9000 1/18/2020 Singapore
AL8400SE-7 Arrow Electronics Central EU 205 1/19/2020 Buy Now Germany
AL8400SE-7 Mouser Electronics Inc. 4868 1/19/2020 Buy Now United States
AL8400SE-7 Digi-Key Electronics 7532 1/18/2020 Buy Now United States
AL8400SE-7 CEAC International Ltd. 20 1/13/2020 China