The EL1848 is a constant current boost regulator specially designed for driving white LEDs. It can drive 3 LEDs in series or up to 9 LEDs in parallel/series configuration and achieves efficiency up to 91%.
The brightness of the LEDs is adjusted through a voltage level on the CNTL pin. When the level falls below 0.1V, the chip goes into shut-down mode and consumes less than 1µA of supply current for VIN less than 5.5V.
The EL1848 is available in 8-pin TSOT and MSOP packages. The TSOT is just 1mm high, compared to 1.45mm for the standard SOT-23 package.

FEATUREs
• 2.6V to 13.2V input voltage
• 14V maximum output voltage
• Drives up to 9 LEDs, 3 in a series
• 1MHz switching frequency
• Up to 91% efficiency
• 1µA maximum shut-down current
• Dimming control
• 8-pin TSOT and MSOP packages
• Pb-free Available

APPLICATIONs
• PDAs
• Cellular phones
• Digital cameras
• White LED backlighting