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.
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
(15mm × 9mm) and low profi le (2.82mm) molded
Land Grid Array (LGA) package suitable for automated
assembly by standard surface mount equipment. The
LTM8040 is Pb-free and RoHS compliant.