DESCRIPTION
The LTM®8040 is a fi xed frequency 1A step-down DC/DC μModule™ 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 2.4V to 13V. Unique PWM circuitry allows a dimming range of 400:1, avoiding the color shift normally associated with LED current dimming.

FEATURES
■ True Color PWM™ Delivers Constant Color with 400:1 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 Cathode Connection
■ Small Footprint, Low Profile (15mm × 9mm × 2.82mm) Surface Mount LGA Package

APPLICATIONS
■ Automotive and Avionic Lighting
■ Architectural Detail Lighting
■ Display Backlighting
■ Constant Current Sources