Description
The YB1506 is a step-up(Boost) DC-DC converter; operate as current source to drive up to 5 white LEDs in series. Series connecting of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The light intensity of these LEDs is proportional to the current passing through them. The low off-time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space consideration applications for cellular phone backlighting or other hand held equipment.

FEATUREs
 Internal switch
 Adjustable output voltage up to 22V
 2.2V to 6.5V input range
 0.1uA shutdown current
 Small 5-Lead SOT-23 package
 High efficiency
 Drives 5 white LEDs
 Over voltage protection
 
Applications
 LCD Display Module
 White LED Backlighting
 PDAs
 Digital Cameras
 Portable Application
 Cellular Phone
 Electronic books