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The AL8805 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 36V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8805 switches at frequency up to 1MHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AL8805 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming.


  • MR16 lamps
  • General illumination lamps


  • LED Driving Current up to 1A
  • Better than 5% Accuracy
  • High Efficiency up to 98%
  • Operating Input Voltage from 6V to 36V
  • High Switching Frequency up to 1MHz
  • PWM/DC Input for Dimming Control
  • Built-In Output Open-Circuit Protection
  • SOT25: Available in “Green” Molding Compound (No Br,Sb) with lead Free Finish/ RoHS Compliant

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
Minimum Input Voltage 6 V
Maximum Input Voltage 36 V
Maximum Output Voltage 36 V
Maximum LED Current 1 A
LED Current Accuracy 5 %
Switching Frequency Maximum 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency 98 %
Operating Temperature Range -40 to 125 °C
Sense Voltage 100 mV
AEC-Q100 Grade No

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Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Countries/Regions
AL8805W5-7 Arrow Electronics Central EU 3000 10/20/2020 Buy Now Europe
AL8805W5-7 Arrow Electronics Central EU 6000 10/20/2020 Buy Now Europe
AL8805W5-7 Digi-Key Electronics 37715 10/20/2020 Buy Now Europe, Asia, North America
AL8805W5-7 Farnell, An Avnet Company 7572 10/20/2020 Buy Now England
AL8805W5-7 Mouser Electronics Inc. 14789 10/20/2020 Buy Now South America, North America, Asia, Europe, Middle East
AL8805W5-7 Rutronik GmbH 3000 10/20/2020 Buy Now Germany
AL8805W5-7 Future Electronics 6000 10/19/2020 Buy Now Canada
AL8805W5-7 Future Electronics - Asia 21000 10/19/2020 Singapore
AL8805W5-7 RS Components 145 10/19/2020 Buy Now England
AL8805W5-7 RS Components Ltd. 100 10/19/2020 Buy Now Japan