LTC3219 Datasheet - Linear Technology

DESCRIPTION
The LTC®3219 is a highly integrated multidisplay LED driver. The device contains a high efficiency, low noise charge pump to provide power to nine universal LED current sources. The LTC3219 requires only five small ceramic capacitors to form a complete LED power supply and current controller.

FEATURES
■ Multimode Charge Pump Provides Up to 91%
   Efficiency
■ Slew Limited Switching Reduces Conducted and
   Radiated Noise (EMI)
■ Up to 250mA Total Output Current
■ Nine 28mA Universal Current Sources with 64-Step
   Linear Brightness Control
■ Independent On/Off, Brightness Level, Blinking and
   Gradation Control for Each Current Source Using
   2-Wire I2CTM Interface
■ Internal Current Reference
■ Confi gurable ENU Pin for Asynchronous LED On/Off
   Control
■ Low Noise Charge Pump Operates in 1x, 1.5x or 2x
   Mode for Optimal Effi ciency*
■ Automatic or Forced Mode Switching
■ Internal Soft-Start Limits Inrush Current
■ Short-Circuit/Thermal Protection
■ 3mm × 3mm 20-Lead QFN Plastic Package

APPLICATIONS
■ Video Phones with QVGA+ Displays