DESCRIPTION
The LT®3593 is a step-up DC/DC converter designed to drive up to ten white LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents and eliminates the need for ballast resistors. The device features a unique high side LED current sense that enables the part to function as a “one wire current source” where the low side of the LED string can be returned to ground anywhere.

FEATURES
■ Drives Up to Ten White LEDs from a 3V Supply
■ One Pin Shutdown and Current Programming
■ LEDs Disconnected in Shutdown
■ 32:1 Linear Brightness Control Range
■ VIN Range: 2.7V to 5.5V
■ ±5% Output Current Accuracy at Full Scale
■ Low Shutdown Current: 3μA
■ 1MHz Switching Frequency
■ Requires Only 1μF Output Capacitor
■ Low Profi le 6-Lead DFN (2mm × 2mm × 0.75mm)
   and 6-Lead SOT-23 Packages

APPLICATIONS
■ Cell Phones
■ Digital Cameras
■ PDAs, Handheld Computers
■ MP3 Players
■ GPS Receivers