ADI LTM8040IV#PBF

The LTM8040 is a fixed frequency 1A step-down DC/DC μModule regulator designed to operate as a constant current source. Internal circuitry monitors the output current to provide accurate current regulation, which is ideal for driving high current LEDs. High output current accuracy is maintained over a wide current range, from 35mA to 1A, allowing a wide dimming range over an output voltage range of 2.5V to 13V. Unique PWM circuitry allows a dimming range of 250:1, avoiding the color shift normally associated with LED current dimming. With its wide input range of 4V to 36V, the LTM8040 regulates a broad array of power sources, from 4-cell batteries and 5V logic rails to unregulated wall transformers, lead acid batteries and distributed power supplies. The LTM8040 is packaged in a thermally enhanced, compact (15mmx9mmx4.32mm) molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment. The LTM8040 is Pb-free and RoHS compliant.

• True Color PWM™ Delivers Constant Color with 250:1 Dimming Ratio
• Wide Input Range: 4V to 36V
• Up to 1A LED Current
• Adjustable Control of LED Current
• High Output Current Accuracy is Maintained Over a Wide Range from 35mA to 1A
• Open LED and Short-Circuit Protection
• Grounded LED Cathode Connection
• Small Footprint (15mm×9mm×4.32mm)
• Surface Mount LGA Package

• Automotive and Avionic Lighting
• Architectural Detail Lighting
• Display Backlighting
• Constant Current Sources